Updated readme and bumped version

Added resolve-path and tests. #627; Commented out write-warning

AddConditionalFormatting.ps1

@@ -1,4 +1,9 @@
-Function Add-ConditionalFormatting {
+try   {
+    #ensure that color and font lookups are available
+    [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
+}
+catch {}
+Function Add-ConditionalFormatting {
     <#
       .Synopsis
         Adds conditional formatting to all or part of a worksheet.
@@ -105,7 +110,7 @@
         [OfficeOpenXml.ConditionalFormatting.eExcelConditionalFormattingRuleType]$RuleType ,
         #Text color for matching objects
         [Parameter(ParameterSetName = "NamedRule")]
-        [Alias("ForegroundColour")]
+        [Alias("ForegroundColour","FontColor")]
         $ForegroundColor,
         #Color for databar type charts
         [Parameter(Mandatory = $true, ParameterSetName = "DataBar")]

ColorCompletion.ps1

@@ -27,6 +27,10 @@ if (Get-Command -Name register-argumentCompleter -ErrorAction SilentlyContinue)
     Register-ArgumentCompleter -CommandName New-ConditionalText        -ParameterName PatternColor           -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName New-ConditionalText        -ParameterName BackgroundColor        -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName New-ConditionalText        -ParameterName ConditionalTextColor   -ScriptBlock $Function:ColorCompletion
+    Register-ArgumentCompleter -CommandName New-ExcelStyle             -ParameterName BackgroundColor        -ScriptBlock $Function:ColorCompletion
+    Register-ArgumentCompleter -CommandName New-ExcelStyle             -ParameterName FontColor              -ScriptBlock $Function:ColorCompletion
+    Register-ArgumentCompleter -CommandName New-ExcelStyle             -ParameterName BorderColor            -ScriptBlock $Function:ColorCompletion
+    Register-ArgumentCompleter -CommandName New-ExcelStyle             -ParameterName PatternColor           -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRange             -ParameterName BackgroundColor        -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRange             -ParameterName FontColor              -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRange             -ParameterName BorderColor            -ScriptBlock $Function:ColorCompletion
@@ -37,5 +41,4 @@ if (Get-Command -Name register-argumentCompleter -ErrorAction SilentlyContinue)
     Register-ArgumentCompleter -CommandName Set-ExcelRow               -ParameterName BackgroundColor        -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRow               -ParameterName FontColor              -ScriptBlock $Function:ColorCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRow               -ParameterName PatternColor           -ScriptBlock $Function:ColorCompletion
-
 }

Examples/Charts/ChartAndTrendlines.ps1

@@ -0,0 +1,21 @@
+# Creates a worksheet, addes a chart and then a Linear trendline
+
+$xlfile = "$env:TEMP\trendLine.xlsx"
+Remove-Item $xlfile -ErrorAction SilentlyContinue
+
+$data = ConvertFrom-Csv @"
+Region,Item,TotalSold
+West,screws,60
+South,lemon,48
+South,apple,71
+East,screwdriver,70
+East,kiwi,32
+West,screwdriver,1
+South,melon,21
+East,apple,79
+South,apple,68
+South,avocado,73
+"@
+
+$cd = New-ExcelChartDefinition -XRange Region -YRange TotalSold -ChartType ColumnClustered -ChartTrendLine Linear
+$data | Export-Excel $xlfile -ExcelChartDefinition $cd -AutoNameRange -Show

Examples/Charts/NumberOfVisitors.ps1

@@ -0,0 +1,27 @@
+$xlfile = "$env:TEMP\visitors.xlsx"
+Remove-Item $xlfile -ErrorAction SilentlyContinue
+
+$data = ConvertFrom-Csv @"
+Week, TotalVisitors
+1,11916
+2,11665
+3,13901
+4,15444
+5,21592
+6,15057
+7,26187
+8,20662
+9,28935
+10,32443
+"@
+
+$cd = New-ExcelChartDefinition `
+    -XRange Week `
+    -YRange TotalVisitors `
+    -Title "No. Of Visitors" `
+    -ChartType ColumnClustered `
+    -NoLegend `
+    -ChartTrendLine Linear
+
+$data | Export-Excel $xlfile -Show -AutoNameRange -AutoSize -TableName Visitors -ExcelChartDefinition $cd
+

Examples/CustomReporting/CustomReport.ps1

@@ -1,6 +1,6 @@
 try {. $PSScriptRoot\..\..\LoadPSD1.ps1} catch {}
 
-$f = ".\dashboard.xlsx"
+$f = "$env:temp\dashboard.xlsx"
 Remove-Item $f -ErrorAction Ignore
 
 $data = @"
@@ -69,4 +69,4 @@ Set-Format -Address $sheet1.Cells["I10"] -Formula "=Sum(I3:I8)" -Bold
 Set-Format -Address $sheet1.Cells["M10"] -Formula "=Sum(M3:M8)" -Bold
 Set-Format -Address $sheet1.Cells["O10"] -Formula "=Sum(O3:O8)" -Bold
 
-Close-ExcelPackage $excel -Show
+Close-ExcelPackage $excel -Show

Examples/Styles/MultipleStyles.ps1

@@ -0,0 +1,35 @@
+try { . $PSScriptRoot\..\..\LoadPSD1.ps1 } catch { }
+
+$xlfile = "$env:TEMP\test.xlsx"
+Remove-Item $xlfile -ErrorAction SilentlyContinue
+
+$data = ConvertFrom-Csv @"
+Region,Item,TotalSold
+North,melon,38
+South,screwdriver,21
+South,peach,33
+South,saw,81
+South,kiwi,70
+North,orange,59
+North,avocado,25
+South,lime,48
+South,nail,83
+North,apple,2
+"@
+
+$styleParams = @{
+    FontSize = 13
+    Bold     = $true
+}
+
+$styles = $(
+    New-ExcelStyle -BackgroundColor LightBlue -FontSize 14 -Bold -Range "A1:H1" -HorizontalAlignment Center -Merge
+
+    New-ExcelStyle -BackgroundColor LimeGreen -Range "B10" @styleParams
+    New-ExcelStyle -BackgroundColor PeachPuff -Range "B5" @styleParams
+    New-ExcelStyle -BackgroundColor Orange -Range "B8" @styleParams
+    New-ExcelStyle -BackgroundColor Red -Range "B12" @styleParams
+)
+
+$reportTitle = "This is a report Title"
+$data | Export-Excel $xlfile -Show -AutoSize -AutoFilter -Title $reportTitle -Style $styles

Examples/Styles/NewExcelStyle.ps1

@@ -0,0 +1,23 @@
+# https://raw.githubusercontent.com/dfinke/ImportExcel/master/images/NewExcelStyle.png
+try { . $PSScriptRoot\..\..\LoadPSD1.ps1 } catch { }
+
+$xlfile = "$env:TEMP\test.xlsx"
+Remove-Item $xlfile -ErrorAction SilentlyContinue
+
+$data = ConvertFrom-Csv @"
+Region,Item,TotalSold
+North,melon,38
+South,screwdriver,21
+South,peach,33
+South,saw,81
+South,kiwi,70
+North,orange,59
+North,avocado,25
+South,lime,48
+South,nail,83
+North,apple,2
+"@
+
+$reportTitle = "This is a report Title"
+$style = New-ExcelStyle -BackgroundColor LightBlue -FontSize 14 -Bold -Range "A1:H1" -HorizontalAlignment Center -Merge
+$data | Export-Excel $xlfile -Show -AutoSize -AutoFilter -Title $reportTitle -Style $style

Examples/VBA/HelloWorldVBA.ps1

@@ -0,0 +1,38 @@
+$xlfile = "$env:temp\test.xlsm"
+Remove-Item $xlfile -ErrorAction SilentlyContinue
+
+$Excel = ConvertFrom-Csv @"
+Region,Item,TotalSold
+West,screwdriver,98
+West,kiwi,19
+North,kiwi,47
+West,screws,48
+West,avocado,52
+East,avocado,40
+South,drill,61
+North,orange,92
+South,drill,29
+South,saw,36
+"@ | Export-Excel $xlfile -PassThru -AutoSize
+
+$wb = $Excel.Workbook
+$sheet = $wb.Worksheets["Sheet1"]
+$wb.CreateVBAProject()
+
+$code = @"
+Public Function HelloWorld() As String
+    HelloWorld = "Hello World"
+End Function
+
+Public Function DoSum() As Integer
+    DoSum = Application.Sum(Range("C:C"))
+End Function
+"@
+
+$module = $wb.VbaProject.Modules.AddModule("PSExcelModule")
+$module.Code = $code
+
+Set-Format -WorkSheet $sheet -Range "h7" -Formula "HelloWorld()" -AutoSize
+Set-Format -WorkSheet $sheet -Range "h8" -Formula "DoSum()" -AutoSize
+
+Close-ExcelPackage $Excel -Show

Export-Excel.ps1

@@ -499,6 +499,7 @@
         [Switch]$AutoNameRange,
         [Int]$StartRow = 1,
         [Int]$StartColumn = 1,
+        [alias('PT')]
         [Switch]$PassThru,
         [String]$Numberformat = 'General',
         [string[]]$ExcludeProperty,
@@ -507,6 +508,7 @@
         [String[]]$NoNumberConversion,
         [Object[]]$ConditionalFormat,
         [Object[]]$ConditionalText,
+        [Object[]]$Style,
         [ScriptBlock]$CellStyleSB,
         #If there is already content in the workbook the sheet with the PivotTable will not be active UNLESS Activate is specified
         [switch]$Activate,
@@ -1022,7 +1024,10 @@
             }
             catch {throw "Error applying conditional formatting to worksheet $_"}
         }
-
+        foreach ($s in $Style) {
+            if (-not $s.Range) {$s["Range"] = $ws.Dimension.Address }
+            Set-ExcelRange -WorkSheet $ws @s
+        }
         if ($CellStyleSB) {
             try {
                 $TotalRows = $ws.Dimension.Rows

ImportExcel.psd1

@@ -4,7 +4,7 @@
     RootModule        = 'ImportExcel.psm1'
 
     # Version number of this module.
-    ModuleVersion     = '6.1.0'
+    ModuleVersion     = '6.2.2'
 
     # ID used to uniquely identify this module
     GUID              = '60dd4136-feff-401a-ba27-a84458c57ede'
@@ -103,6 +103,7 @@ Check out the How To Videos https://www.youtube.com/watch?v=U3Ne_yX4tYo&list=PL5
         'New-ConditionalFormattingIconSet',
         'New-ConditionalText',
         'New-ExcelChartDefinition',
+        'New-ExcelStyle',
         'New-PivotTableDefinition',
         'New-Plot',
         'New-PSItem',

ImportExcel.psm1

@@ -48,7 +48,7 @@ if ($PSVersionTable.PSVersion.Major -ge 5) {
     . $PSScriptRoot\plot.ps1
 
     Function New-Plot {
-        [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '', Justification='New-Plot does not change system state')]
+        [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '', Justification = 'New-Plot does not change system state')]
         Param()
 
         [PSPlot]::new()
@@ -269,7 +269,6 @@ function Import-Excel {
         [Parameter(ParameterSetName = "PathA", Mandatory, ValueFromPipelineByPropertyName, ValueFromPipeline, Position = 0 )]
         [Parameter(ParameterSetName = "PathB", Mandatory, ValueFromPipelineByPropertyName, ValueFromPipeline, Position = 0 )]
         [Parameter(ParameterSetName = "PathC", Mandatory, ValueFromPipelineByPropertyName, ValueFromPipeline, Position = 0 )]
-        [ValidateScript( {(Test-Path -Path $_ -PathType Leaf) -and ($_ -match '.xls$|.xlsx$|.xlsm$')})]
         [String]$Path,
         [Parameter(ParameterSetName = "PackageA", Mandatory)]
         [Parameter(ParameterSetName = "PackageB", Mandatory)]
@@ -300,12 +299,13 @@ function Import-Excel {
     )
     begin {
         $sw = [System.Diagnostics.Stopwatch]::StartNew()
+
         Function Get-PropertyNames {
             <#
             .SYNOPSIS
                 Create objects containing the column number and the column name for each of the different header types.
             #>
-            [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseSingularNouns', '', Justification="Name would be incorrect, and command is not exported")]
+            [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseSingularNouns', '', Justification = "Name would be incorrect, and command is not exported")]
             Param (
                 [Parameter(Mandatory)]
                 [Int[]]$Columns,
@@ -318,13 +318,13 @@ function Import-Excel {
                     $i = 0
                     foreach ($C in $Columns) {
                         $i++
-                        $C | Select-Object @{N = 'Column'; E = {$_}}, @{N = 'Value'; E = {'P' + $i}}
+                        $C | Select-Object @{N = 'Column'; E = { $_ } }, @{N = 'Value'; E = { 'P' + $i } }
                     }
                 }
                 elseif ($HeaderName) {
                     $i = 0
                     foreach ($H in $HeaderName) {
-                        $H | Select-Object @{N = 'Column'; E = {$Columns[$i]}}, @{N = 'Value'; E = {$H}}
+                        $H | Select-Object @{N = 'Column'; E = { $Columns[$i] } }, @{N = 'Value'; E = { $H } }
                         $i++
                     }
                 }
@@ -334,7 +334,7 @@ function Import-Excel {
                     }
 
                     foreach ($C in $Columns) {
-                        $Worksheet.Cells[$StartRow, $C] | Where-Object {$_.Value} | Select-Object @{N = 'Column'; E = {$C}}, Value
+                        $Worksheet.Cells[$StartRow, $C] | Where-Object { $_.Value } | Select-Object @{N = 'Column'; E = { $C } }, Value
                     }
                 }
             }
@@ -345,41 +345,57 @@ function Import-Excel {
     }
 
     process {
-        if      ($Path -and  $Password)  {$ExcelPackage = Open-ExcelPackage -Path $Path -Password $Password}
-        elseif ($Path)                   {$ExcelPackage = Open-ExcelPackage -Path $Path}
+        if ($path) {
+            $extension = [System.IO.Path]::GetExtension($Path)
+            if ($extension -notmatch '.xlsx$|.xlsm$') {
+                throw "Import-Excel does not support reading this extension type $($extension)"
+            }
+
+            $resolvedPath = (Resolve-Path $Path -ErrorAction SilentlyContinue)
+            if ($resolvedPath) {
+                $Path = $resolvedPath.ProviderPath
+            }
+            else {
+                throw "'$($Path)' file not found"
+            }
+
+            $stream = New-Object -TypeName System.IO.FileStream -ArgumentList $Path, 'Open', 'Read', 'ReadWrite'
+            if ($Password) { $ExcelPackage = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $stream , $Password }
+            else { $ExcelPackage = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $stream }
+        }
         try {
             #Select worksheet
             if (-not  $WorksheetName) { $Worksheet = $ExcelPackage.Workbook.Worksheets[1] }
-            elseif(-not ($Worksheet = $ExcelPackage.Workbook.Worksheets[$WorkSheetName])) {
-                    throw "Worksheet '$WorksheetName' not found, the workbook only contains the worksheets '$($ExcelPackage.Workbook.Worksheets)'. If you only wish to select the first worksheet, please remove the '-WorksheetName' parameter." ; return
+            elseif (-not ($Worksheet = $ExcelPackage.Workbook.Worksheets[$WorkSheetName])) {
+                throw "Worksheet '$WorksheetName' not found, the workbook only contains the worksheets '$($ExcelPackage.Workbook.Worksheets)'. If you only wish to select the first worksheet, please remove the '-WorksheetName' parameter." ; return
             }
 
             Write-Debug $sw.Elapsed.TotalMilliseconds
             #region Get rows and columns
             #If we are doing dataonly it is quicker to work out which rows to ignore before processing the cells.
-            if (-not $EndRow   ) {$EndRow = $Worksheet.Dimension.End.Row    }
-            if (-not $EndColumn) {$EndColumn = $Worksheet.Dimension.End.Column }
+            if (-not $EndRow   ) { $EndRow = $Worksheet.Dimension.End.Row }
+            if (-not $EndColumn) { $EndColumn = $Worksheet.Dimension.End.Column }
             $endAddress = [OfficeOpenXml.ExcelAddress]::TranslateFromR1C1("R[$EndRow]C[$EndColumn]", 0, 0)
             if ($DataOnly) {
                 #If we are using headers startrow will be the header-row so examine data from startRow + 1,
-                if ($NoHeader) {$range = "A" + ($StartRow     ) + ":" + $endAddress }
-                else {$range = "A" + ($StartRow + 1 ) + ":" + $endAddress }
+                if ($NoHeader) { $range = "A" + ($StartRow     ) + ":" + $endAddress }
+                else { $range = "A" + ($StartRow + 1 ) + ":" + $endAddress }
                 #We're going to look at every cell and build 2 hash tables holding rows & columns which contain data.
                 #Want to Avoid 'select unique' operations & large Sorts, becuse time time taken increases with square
                 #of number of items (PS uses heapsort at large size). Instead keep a list of what we have seen,
                 #using Hash tables: "we've seen it" is all we need, no need to worry about "seen it before" / "Seen it many times".
-                $colHash = @{}
-                $rowHash = @{}
+                $colHash = @{ }
+                $rowHash = @{ }
                 foreach ($cell in $Worksheet.Cells[$range]) {
-                    if ($null -ne $cell.Value ) {$colHash[$cell.Start.Column] = 1; $rowHash[$cell.Start.row] = 1 }
+                    if ($null -ne $cell.Value ) { $colHash[$cell.Start.Column] = 1; $rowHash[$cell.Start.row] = 1 }
                 }
-                $rows = (   $StartRow..$EndRow   ).Where( {$rowHash[$_]})
-                $columns = ($StartColumn..$EndColumn).Where( {$colHash[$_]})
+                $rows = (   $StartRow..$EndRow   ).Where( { $rowHash[$_] })
+                $columns = ($StartColumn..$EndColumn).Where( { $colHash[$_] })
             }
             else {
-                $Columns = $StartColumn .. $EndColumn  ; if ($StartColumn -gt $EndColumn) {Write-Warning -Message "Selecting columns $StartColumn to $EndColumn might give odd results."}
-                if ($NoHeader) {$Rows =  $StartRow..$EndRow ; if ($StartRow -gt $EndRow) {Write-Warning -Message "Selecting rows $StartRow to $EndRow might give odd results."} }
-                else {$Rows = (1 + $StartRow)..$EndRow ; if ($StartRow -ge $EndRow) {Write-Warning -Message "Selecting $StartRow as the header with data in $(1+$StartRow) to $EndRow might give odd results."}}
+                $Columns = $StartColumn .. $EndColumn  ; if ($StartColumn -gt $EndColumn) { Write-Warning -Message "Selecting columns $StartColumn to $EndColumn might give odd results." }
+                if ($NoHeader) { $Rows = $StartRow..$EndRow ; if ($StartRow -gt $EndRow) { Write-Warning -Message "Selecting rows $StartRow to $EndRow might give odd results." } }
+                else { $Rows = (1 + $StartRow)..$EndRow } # ; if ($StartRow -ge $EndRow) { Write-Warning -Message "Selecting $StartRow as the header with data in $(1+$StartRow) to $EndRow might give odd results." } }
             }
             #endregion
             #region Create property names
@@ -399,7 +415,7 @@ function Import-Excel {
                 foreach ($R in $Rows) {
                     #Disabled write-verbose for speed
                     #  Write-Verbose "Import row '$R'"
-                    $NewRow = [Ordered]@{}
+                    $NewRow = [Ordered]@{ }
 
                     foreach ($P in $PropertyNames) {
                         $NewRow[$P.Value] = $Worksheet.Cells[$R, $P.Column].Value
@@ -414,7 +430,7 @@ function Import-Excel {
         }
         catch { throw "Failed importing the Excel workbook '$Path' with worksheet '$Worksheetname': $_"; return }
         finally {
-            if ($Path) {Close-ExcelPackage -ExcelPackage $ExcelPackage -NoSave }
+            if ($Path) { $stream.close(); $ExcelPackage.Dispose() }
         }
     }
 }
@@ -460,9 +476,9 @@ function ConvertFrom-ExcelSheet {
     $xl = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $Stream
     $workbook = $xl.Workbook
 
-    $targetSheets = $workbook.Worksheets | Where-Object {$_.Name -like $SheetName}
+    $targetSheets = $workbook.Worksheets | Where-Object { $_.Name -like $SheetName }
 
-    $params = @{} + $PSBoundParameters
+    $params = @{ } + $PSBoundParameters
     $params.Remove("OutputPath")
     $params.Remove("SheetName")
     $params.Remove('Extension')
@@ -493,7 +509,7 @@ function Export-MultipleExcelSheets {
         [Switch]$AutoSize
     )
 
-    $parameters = @{} + $PSBoundParameters
+    $parameters = @{ } + $PSBoundParameters
     $parameters.Remove("InfoMap")
     $parameters.Remove("Show")
 
@@ -506,17 +522,17 @@ function Export-MultipleExcelSheets {
         & $entry.Value | Export-Excel @parameters
     }
 
-    if ($Show) {Invoke-Item $Path}
+    if ($Show) { Invoke-Item $Path }
 }
 
 Function WorksheetArgumentCompleter {
     param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)
     $xlPath = $fakeBoundParameter['Path']
     if (Test-Path -Path $xlPath) {
-        $xlpkg = Open-ExcelPackage -Path $xlPath
+        $xlpkg = Open-ExcelPackage -ReadOnly -Path $xlPath
         $WorksheetNames = $xlPkg.Workbook.Worksheets.Name
         Close-ExcelPackage -nosave -ExcelPackage $xlpkg
-        $WorksheetNames.where( {$_ -like "*$wordToComplete*"}) | foreach-object {
+        $WorksheetNames.where( { $_ -like "*$wordToComplete*" }) | foreach-object {
             New-Object -TypeName System.Management.Automation.CompletionResult -ArgumentList "'$_'",
             $_ , ([System.Management.Automation.CompletionResultType]::ParameterValue) , $_
         }

New-ConditionalText.ps1

@@ -39,7 +39,7 @@ function New-ConditionalText {
         "Finish Position". The range could be written -Range "C:C" to specify a
         named column, or -Range "C2:C102" to specify certain cells in the column.
       .Link
-        Add-Add-ConditionalFormatting
+        Add-ConditionalFormatting
         New-ConditionalFormattingIconSet
     #>
     [cmdletbinding()]

New-ExcelChart.ps1

@@ -97,11 +97,12 @@
     #>
     [Alias("New-ExcelChart")] #This was the former name. The new name reflects that we are defining a chart, not making one in the workbook.
     [cmdletbinding()]
-    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '',Justification='Does not change system State')]
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '', Justification = 'Does not change system State')]
     param(
         $Title = "Chart Title",
         $Header,
         [OfficeOpenXml.Drawing.Chart.eChartType]$ChartType = "ColumnStacked",
+        [OfficeOpenXml.Drawing.Chart.eTrendLine[]]$ChartTrendLine,
         $XRange,
         $YRange,
         $Width = 500,
@@ -138,11 +139,12 @@
         $YMinValue,
         [OfficeOpenXml.Drawing.Chart.eAxisPosition]$YAxisPosition
     )
-    if ( $Header ) {Write-Warning "The header parameter is ignored."} #Nothing was done with it when creating a chart.
+    if ( $Header ) { Write-Warning "The header parameter is ignored." } #Nothing was done with it when creating a chart.
     #might be able to do [PSCustomObject]$PsboundParameters,   the defaults here match those in Add-Excel Chart
     [PSCustomObject]@{
         Title              = $Title
         ChartType          = $ChartType
+        ChartTrendLine     = $ChartTrendLine
         XRange             = $XRange
         YRange             = $YRange
         Width              = $Width
@@ -151,14 +153,14 @@
         RowOffSetPixels    = $RowOffSetPixels
         Column             = $Column
         ColumnOffSetPixels = $ColumnOffSetPixels
-        LegendPosition      = $LegendPosition
+        LegendPosition     = $LegendPosition
         LegendSize         = $LegendSize
         Legendbold         = $LegendBold
-        NoLegend           = $NoLegend     -as [Boolean]
+        NoLegend           = $NoLegend -as [Boolean]
         ShowCategory       = $ShowCategory -as [Boolean]
-        ShowPercent        = $ShowPercent  -as [Boolean]
+        ShowPercent        = $ShowPercent -as [Boolean]
         SeriesHeader       = $SeriesHeader
-        TitleBold          = $TitleBold    -as [Boolean]
+        TitleBold          = $TitleBold -as [Boolean]
         TitleSize          = $TitleSize
         XAxisTitleText     = $XAxisTitleText
         XAxisTitleBold     = $XAxisTitleBold -as [Boolean]
@@ -170,7 +172,7 @@
         XMinValue          = $XMinValue
         XAxisPosition      = $XAxisPosition
         YAxisTitleText     = $YAxisTitleText
-        YAxisTitleBold     = $YAxisTitleBold  -as [Boolean]
+        YAxisTitleBold     = $YAxisTitleBold -as [Boolean]
         YAxisTitleSize     = $YAxisTitleSize
         YAxisNumberformat  = $YAxisNumberformat
         YMajorUnit         = $YMajorUnit
@@ -326,24 +328,25 @@ function Add-ExcelChart {
         and is marked off in units of 0.25 shown to two decimal places.
         The key will for the chart will be at the bottom in 8 point bold type and the line will be named "Sin(x)".
     #>
-    [cmdletbinding(DefaultParameterSetName='Worksheet')]
+    [cmdletbinding(DefaultParameterSetName = 'Worksheet')]
     [OutputType([OfficeOpenXml.Drawing.Chart.ExcelChart])]
     param(
-        [Parameter(ParameterSetName='Workshet',Mandatory=$true)]
+        [Parameter(ParameterSetName = 'Workshet', Mandatory = $true)]
         [OfficeOpenXml.ExcelWorksheet]$Worksheet,
-        [Parameter(ParameterSetName='PivotTable',Mandatory=$true)]
+        [Parameter(ParameterSetName = 'PivotTable', Mandatory = $true)]
         [OfficeOpenXml.Table.PivotTable.ExcelPivotTable]$PivotTable ,
         [String]$Title,
         #$Header,   Not used but referenced previously
         [OfficeOpenXml.Drawing.Chart.eChartType]$ChartType = "ColumnStacked",
+        [OfficeOpenXml.Drawing.Chart.eTrendLine[]]$ChartTrendLine,
         $XRange,
         $YRange,
-        [int]$Width              = 500,
-        [int]$Height             = 350,
-        [int]$Row                =   0,
-        [int]$RowOffSetPixels    =  10,
-        [int]$Column             =   6,
-        [int]$ColumnOffSetPixels =   5,
+        [int]$Width = 500,
+        [int]$Height = 350,
+        [int]$Row = 0,
+        [int]$RowOffSetPixels = 10,
+        [int]$Column = 6,
+        [int]$ColumnOffSetPixels = 5,
         [OfficeOpenXml.Drawing.Chart.eLegendPosition]$LegendPosition,
         $LegendSize,
         [Switch]$LegendBold,
@@ -372,11 +375,11 @@ function Add-ExcelChart {
         $YMinValue,
         [OfficeOpenXml.Drawing.Chart.eAxisPosition]$YAxisPosition,
         [Switch]$PassThru
-        )
+    )
     try {
         if ($PivotTable) {
             $Worksheet = $PivotTable.WorkSheet
-            $chart     = $Worksheet.Drawings.AddChart(("Chart" + $PivotTable.Name ),$ChartType,$PivotTable)
+            $chart = $Worksheet.Drawings.AddChart(("Chart" + $PivotTable.Name ), $ChartType, $PivotTable)
         }
         else {
             $ChartName = 'Chart' + (Split-Path -Leaf ([System.IO.path]::GetTempFileName())) -replace 'tmp|\.', ''
@@ -384,75 +387,85 @@ function Add-ExcelChart {
             $chartDefCount = @($YRange).Count
             if ($chartDefCount -eq 1) {
                 $Series = $chart.Series.Add($YRange, $XRange)
-                if ($SeriesHeader) { $Series.Header = $SeriesHeader}
-                else { $Series.Header = 'Series 1'}
+                if ($ChartTrendLine) {
+                    if ($ChartType -notmatch "stacked|3D$|pie|Doughnut|Cone|Cylinder|Pyramid") {
+                        foreach ($trendLine in $ChartTrendLine) {
+                            $null = $Series.TrendLines.Add($trendLine)
+                        }
+                    }
+                    else {
+                        Write-Warning "Chart trend line is not supported for chart type: $ChartType"
+                    }
+                }
+                if ($SeriesHeader) { $Series.Header = $SeriesHeader }
+                else { $Series.Header = 'Series 1' }
             }
             else {
                 for ($idx = 0; $idx -lt $chartDefCount; $idx += 1) {
                     if ($Yrange.count -eq $xrange.count) {
-                      $Series = $chart.Series.Add($YRange[$idx], $XRange[$idx])
+                        $Series = $chart.Series.Add($YRange[$idx], $XRange[$idx])
                     }
                     else {
-                      $Series = $chart.Series.Add($YRange[$idx], $XRange)
+                        $Series = $chart.Series.Add($YRange[$idx], $XRange)
                     }
                     if ($SeriesHeader.Count -gt 0) {
-                      if ($SeriesHeader[$idx] -match '^=') {$Series.HeaderAddress = $SeriesHeader[$idx] -replace '^=',''}
-                      else                                 {$Series.Header        = $SeriesHeader[$idx] }
+                        if ($SeriesHeader[$idx] -match '^=') { $Series.HeaderAddress = $SeriesHeader[$idx] -replace '^=', '' }
+                        else { $Series.Header = $SeriesHeader[$idx] }
                     }
-                    else { $Series.Header = "Series $($idx)"}
+                    else { $Series.Header = "Series $($idx)" }
                 }
             }
         }
         if ($Title) {
             $chart.Title.Text = $Title
-            if ($TitleBold) {$chart.Title.Font.Bold = $true}
-            if ($TitleSize) {$chart.Title.Font.Size = $TitleSize}
+            if ($TitleBold) { $chart.Title.Font.Bold = $true }
+            if ($TitleSize) { $chart.Title.Font.Size = $TitleSize }
         }
         if ($NoLegend) { $chart.Legend.Remove() }
         else {
-            if ($PSBoundParameters.ContainsKey('LegendPosition')) {$chart.Legend.Position  = $LegendPosition}
-            if ($PSBoundParameters.ContainsKey('LegendBold'))     {$chart.Legend.Font.Bold = [boolean]$LegendBold}
-            if ($LegendSize)                                      {$chart.Legend.Font.Size = $LegendSize}
+            if ($PSBoundParameters.ContainsKey('LegendPosition')) { $chart.Legend.Position = $LegendPosition }
+            if ($PSBoundParameters.ContainsKey('LegendBold')) { $chart.Legend.Font.Bold = [boolean]$LegendBold }
+            if ($LegendSize) { $chart.Legend.Font.Size = $LegendSize }
         }
 
-        if ($XAxisTitleText)      {
+        if ($XAxisTitleText) {
             $chart.XAxis.Title.Text = $XAxisTitleText
-            if ($PSBoundParameters.ContainsKey('XAxisTitleBold'))  {
-                                   $chart.XAxis.Title.Font.Bold = [boolean]$XAxisTitleBold
+            if ($PSBoundParameters.ContainsKey('XAxisTitleBold')) {
+                $chart.XAxis.Title.Font.Bold = [boolean]$XAxisTitleBold
             }
-            if ($XAxisTitleSize)  {$chart.XAxis.Title.Font.Size = $XAxisTitleSize}
+            if ($XAxisTitleSize) { $chart.XAxis.Title.Font.Size = $XAxisTitleSize }
         }
-        if ($XAxisPosition)       {Write-Warning "X-axis position is not being set propertly at the moment, parameter ignored" }
-                                   #$chart.ChartXml.chartSpace.chart.plotArea.catAx.axPos.val = $XAxisPosition.ToString().substring(0,1)}
-        if ($XMajorUnit)          {$chart.XAxis.MajorUnit       = $XMajorUnit}
-        if ($XMinorUnit)          {$chart.XAxis.MinorUnit       = $XMinorUnit}
-        if ($null -ne $XMinValue) {$chart.XAxis.MinValue        = $XMinValue}
-        if ($null -ne $XMaxValue) {$chart.XAxis.MaxValue        = $XMaxValue}
-        if ($XAxisNumberformat)   {$chart.XAxis.Format          = (Expand-NumberFormat $XAxisNumberformat)}
+        if ($XAxisPosition) { Write-Warning "X-axis position is not being set propertly at the moment, parameter ignored" }
+        #$chart.ChartXml.chartSpace.chart.plotArea.catAx.axPos.val = $XAxisPosition.ToString().substring(0,1)}
+        if ($XMajorUnit) { $chart.XAxis.MajorUnit = $XMajorUnit }
+        if ($XMinorUnit) { $chart.XAxis.MinorUnit = $XMinorUnit }
+        if ($null -ne $XMinValue) { $chart.XAxis.MinValue = $XMinValue }
+        if ($null -ne $XMaxValue) { $chart.XAxis.MaxValue = $XMaxValue }
+        if ($XAxisNumberformat) { $chart.XAxis.Format = (Expand-NumberFormat $XAxisNumberformat) }
 
-       if ($YAxisTitleText)     {
+        if ($YAxisTitleText) {
             $chart.YAxis.Title.Text = $YAxisTitleText
             if ($PSBoundParameters.ContainsKey('YAxisTitleBold')) {
-                                  $chart.YAxis.Title.Font.Bold = [boolean]$YAxisTitleBold
+                $chart.YAxis.Title.Font.Bold = [boolean]$YAxisTitleBold
             }
-            if ($YAxisTitleSize) {$chart.YAxis.Title.Font.Size = $YAxisTitleSize}
+            if ($YAxisTitleSize) { $chart.YAxis.Title.Font.Size = $YAxisTitleSize }
         }
-        if ($YAxisPosition)      {Write-Warning "Y-axis position is not being set propertly at the moment, parameter ignored" }
-                                  #$chart.ChartXml.chartSpace.chart.plotArea.valAx.axPos.val= $YAxisPosition.ToString().substring(0,1)}
-        if ($YMajorUnit)         {$chart.YAxis.MajorUnit       = $YMajorUnit}
-        if ($YMinorUnit)         {$chart.YAxis.MinorUnit       = $YMinorUnit}
-        if ($null -ne $YMinValue){$chart.YAxis.MinValue        = $YMinValue}
-        if ($null -ne $YMaxValue){$chart.YAxis.MaxValue        = $YMaxValue}
-        if ($YAxisNumberformat)  {$chart.YAxis.Format          = (Expand-NumberFormat $YAxisNumberformat)}
+        if ($YAxisPosition) { Write-Warning "Y-axis position is not being set propertly at the moment, parameter ignored" }
+        #$chart.ChartXml.chartSpace.chart.plotArea.valAx.axPos.val= $YAxisPosition.ToString().substring(0,1)}
+        if ($YMajorUnit) { $chart.YAxis.MajorUnit = $YMajorUnit }
+        if ($YMinorUnit) { $chart.YAxis.MinorUnit = $YMinorUnit }
+        if ($null -ne $YMinValue) { $chart.YAxis.MinValue = $YMinValue }
+        if ($null -ne $YMaxValue) { $chart.YAxis.MaxValue = $YMaxValue }
+        if ($YAxisNumberformat) { $chart.YAxis.Format = (Expand-NumberFormat $YAxisNumberformat) }
         if ($null -ne $chart.Datalabel) {
-                                  $chart.Datalabel.ShowCategory = [boolean]$ShowCategory
-                                  $chart.Datalabel.ShowPercent  = [boolean]$ShowPercent
+            $chart.Datalabel.ShowCategory = [boolean]$ShowCategory
+            $chart.Datalabel.ShowPercent = [boolean]$ShowPercent
         }
 
         $chart.SetPosition($Row, $RowOffsetPixels, $Column, $ColumnOffsetPixels)
         $chart.SetSize($Width, $Height)
 
-        if ($PassThru) {return $chart}
+        if ($PassThru) { return $chart }
     }
-    catch {Write-Warning -Message "Failed adding Chart to worksheet '$($WorkSheet).name': $_"}
+    catch { Write-Warning -Message "Failed adding Chart to worksheet '$($WorkSheet).name': $_" }
 }

README.md

@@ -53,6 +53,26 @@ Install-Module ImportExcel -scope CurrentUser
 Install-Module ImportExcel
 ```
 
+# What's new 6.2.1
+
+- Added requested feature, chart trendlines.
+    - [Example PowerShell script](https://github.com/dfinke/ImportExcel/blob/master/Examples/Charts/NumberOfVisitors.ps1)
+
+![](/images/ChartTrendlines.png)
+
+# What's new 6.2.2
+
+- Fixed Import-Excel and relative path issue, added unit tests.
+
+# What's new 6.2.0
+Thank you to [James O'Neill](https://github.com/jhoneill)
+
+- Fixed, Import-Excel can read xlsx files even if already open in Excel
+- Added `New-ExcelStyle`, plus `-Style` to `Export-Excel` and `-Merge` to `Set-ExcelRange`
+- Added [Style Examples](https://github.com/dfinke/ImportExcel/tree/master/Examples/Styles)
+
+![](https://raw.githubusercontent.com/dfinke/ImportExcel/master/images/NewExcelStyle.png)
+
 # What's new 6.1.0
 
 Thank you to [James O'Neill](https://github.com/jhoneill)

SetFormat.ps1

@@ -1,4 +1,4 @@
-Function Set-ExcelRange {
+function Set-ExcelRange {
     <#
       .SYNOPSIS
         Applies number, font, alignment and/or color formatting, values or formulas to a range of Excel cells.
@@ -56,6 +56,7 @@
         #Style for the right border.
         [OfficeOpenXml.Style.ExcelBorderStyle]$BorderRight,
         #Colour for the text - if none is specified it will be left as it is.
+        [Alias('ForegroundColor')]
         $FontColor,
         #Value for the cell.
         $Value,
@@ -107,7 +108,9 @@
         #Hide a row or column  (not a range); use -Hidden:$false to unhide.
         [Switch]$Hidden,
         #Locks cells. Cells are locked by default use -locked:$false on the whole sheet and then lock specific ones, and enable protection on the sheet.
-        [Switch]$Locked
+        [Switch]$Locked,
+        #Merges cells - it is recommended that you explicitly set -HorizontalAlignment
+        [Switch]$Merge
     )
     process {
         if  ($Range -is [Array])  {
@@ -168,6 +171,9 @@
             if ($PSBoundParameters.ContainsKey('VerticalAlignment')) {
                 $Range.Style.VerticalAlignment   = $VerticalAlignment
             }
+            if ($PSBoundParameters.ContainsKey('Merge')) {
+                $Range.Merge   = [boolean]$Merge
+            }
             if ($PSBoundParameters.ContainsKey('Value')) {
                 if ($Value -match '^=')      {$PSBoundParameters["Formula"] = $Value -replace '^=','' }
                 else {
@@ -251,7 +257,7 @@
     }
 }
 
-Function NumberFormatCompletion {
+function NumberFormatCompletion {
     param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)
     $numformats = [ordered]@{
         "General"       = "General"      # format ID  0
@@ -294,6 +300,7 @@ Function NumberFormatCompletion {
 if (Get-Command -ErrorAction SilentlyContinue -name Register-ArgumentCompleter) {
     Register-ArgumentCompleter -CommandName Add-ConditionalFormatting  -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
     Register-ArgumentCompleter -CommandName Export-Excel               -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
+    Register-ArgumentCompleter -CommandName New-ExcelStyle             -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRange             -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelColumn            -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
     Register-ArgumentCompleter -CommandName Set-ExcelRow               -ParameterName NumberFormat        -ScriptBlock $Function:NumberFormatCompletion
@@ -305,7 +312,27 @@ if (Get-Command -ErrorAction SilentlyContinue -name Register-ArgumentCompleter)
     Register-ArgumentCompleter -CommandName Add-ExcelChart             -ParameterName YAxisNumberformat   -ScriptBlock $Function:NumberFormatCompletion
 }
 
-Function Expand-NumberFormat {
+function ListFonts {
+    param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameter)
+    if (-not $script:FontFamilies) {
+        $script:FontFamilies = @("","")
+        try {
+            $script:FontFamilies = (New-Object System.Drawing.Text.InstalledFontCollection).Families.Name
+        }
+        catch {}
+    }
+    $script:FontFamilies.where({$_ -Gt "" -and $_ -like "$wordToComplete*"} ) | ForEach-Object {
+        New-Object -TypeName System.Management.Automation.CompletionResult -ArgumentList "'$_'" , $_ ,
+        ([System.Management.Automation.CompletionResultType]::ParameterValue) , $_
+    }
+}
+if (Get-Command -ErrorAction SilentlyContinue -name Register-ArgumentCompleter) {
+    Register-ArgumentCompleter -CommandName New-ExcelStyle   -ParameterName FontName        -ScriptBlock $Function:ListFonts
+    Register-ArgumentCompleter -CommandName Set-ExcelColumn  -ParameterName FontName        -ScriptBlock $Function:ListFonts
+    Register-ArgumentCompleter -CommandName Set-ExcelRange   -ParameterName FontName        -ScriptBlock $Function:ListFonts
+    Register-ArgumentCompleter -CommandName Set-ExcelRow     -ParameterName FontName        -ScriptBlock $Function:ListFonts
+}
+function Expand-NumberFormat {
     <#
       .SYNOPSIS
         Converts short names for number formats to the formatting strings used in Excel
@@ -381,3 +408,81 @@ Function Expand-NumberFormat {
         Default         {return  $NumberFormat}
     }
 }
+
+function New-ExcelStyle {
+    param (
+        [Alias("Address")]
+        $Range ,
+        #Number format to apply to cells e.g. "dd/MM/yyyy HH:mm", "£#,##0.00;[Red]-£#,##0.00", "0.00%" , "##/##" , "0.0E+0" etc.
+        [Alias("NFormat")]
+        $NumberFormat,
+        #Style of border to draw around the range.
+        [OfficeOpenXml.Style.ExcelBorderStyle]$BorderAround,
+        #Color of the border.
+        $BorderColor=[System.Drawing.Color]::Black,
+        #Style for the bottom border.
+        [OfficeOpenXml.Style.ExcelBorderStyle]$BorderBottom,
+        #Style for the top border.
+        [OfficeOpenXml.Style.ExcelBorderStyle]$BorderTop,
+        #Style for the left border.
+        [OfficeOpenXml.Style.ExcelBorderStyle]$BorderLeft,
+        #Style for the right border.
+        [OfficeOpenXml.Style.ExcelBorderStyle]$BorderRight,
+        #Colour for the text - if none is specified it will be left as it is.
+        [Alias('ForegroundColor')]
+        $FontColor,
+        #Value for the cell.
+        $Value,
+        #Formula for the cell.
+        $Formula,
+        #Specifies formula should be an array formula (a.k.a CSE [ctrl-shift-enter] formula).
+        [Switch]$ArrayFormula,
+        #Clear Bold, Italic, StrikeThrough and Underline and set color to Black.
+        [Switch]$ResetFont,
+        #Make text bold; use -Bold:$false to remove bold.
+        [Switch]$Bold,
+        #Make text italic;  use -Italic:$false to remove italic.
+        [Switch]$Italic,
+        #Underline the text using the underline style in -UnderlineType;  use -Underline:$false to remove underlining.
+        [Switch]$Underline,
+         #Specifies whether underlining should be single or double, normal or accounting mode. The default is "Single".
+        [OfficeOpenXml.Style.ExcelUnderLineType]$UnderLineType = [OfficeOpenXml.Style.ExcelUnderLineType]::Single,
+        #Strike through text; use -Strikethru:$false to remove Strike through
+        [Switch]$StrikeThru,
+        #Subscript or Superscript (or none).
+        [OfficeOpenXml.Style.ExcelVerticalAlignmentFont]$FontShift,
+        #Font to use - Excel defaults to Calibri.
+        [String]$FontName,
+        #Point size for the text.
+        [float]$FontSize,
+        #Change background color.
+        $BackgroundColor,
+        #Background pattern - Solid by default.
+        [OfficeOpenXml.Style.ExcelFillStyle]$BackgroundPattern = [OfficeOpenXml.Style.ExcelFillStyle]::Solid ,
+        #Secondary color for background pattern.
+        [Alias("PatternColour")]
+        $PatternColor,
+        #Turn on Text-Wrapping; use -WrapText:$false to turn off wrapping.
+        [Switch]$WrapText,
+        #Position cell contents to Left, Right, Center etc. default is 'General'.
+        [OfficeOpenXml.Style.ExcelHorizontalAlignment]$HorizontalAlignment,
+        #Position cell contents to Top, Bottom or Center.
+        [OfficeOpenXml.Style.ExcelVerticalAlignment]$VerticalAlignment,
+        #Degrees to rotate text. Up to +90 for anti-clockwise ("upwards"), or to -90 for clockwise.
+        [ValidateRange(-90, 90)]
+        [int]$TextRotation ,
+        #Autofit cells to width  (columns or ranges only).
+        [Alias("AutoFit")]
+        [Switch]$AutoSize,
+        #Set cells to a fixed width (columns or ranges only), ignored if Autosize is specified.
+        [float]$Width,
+        #Set cells to a fixed height  (rows or ranges only).
+        [float]$Height,
+        #Hide a row or column  (not a range); use -Hidden:$false to unhide.
+        [Switch]$Hidden,
+        #Locks cells. Cells are locked by default use -locked:$false on the whole sheet and then lock specific ones, and enable protection on the sheet.
+        [Switch]$Locked,
+        [Switch]$Merge
+    )
+    $PSBoundParameters
+}

__tests__/AddTrendlinesToAChart.tests.ps1

@@ -0,0 +1,49 @@
+Describe "Test adding trendlines to charts" {
+    BeforeAll {
+        $script:data = ConvertFrom-Csv @"
+Region,Item,TotalSold
+West,screws,60
+South,lemon,48
+South,apple,71
+East,screwdriver,70
+East,kiwi,32
+West,screwdriver,1
+South,melon,21
+East,apple,79
+South,apple,68
+South,avocado,73
+"@
+
+    }
+
+    BeforeEach {
+        $xlfile = "$env:TEMP\trendLine.xlsx"
+        Remove-Item $xlfile -ErrorAction SilentlyContinue
+    }
+
+    It "Should add a linear trendline" {
+
+        $cd = New-ExcelChartDefinition -XRange Region -YRange TotalSold -ChartType ColumnClustered -ChartTrendLine Linear
+        $data | Export-Excel $xlfile -ExcelChartDefinition $cd -AutoNameRange
+
+        $excel = Open-ExcelPackage -Path $xlfile
+        $ws = $excel.Workbook.Worksheets["Sheet1"]
+
+        $ws.Drawings[0].Series.TrendLines.Type | Should Be 'Linear'
+
+        Close-ExcelPackage $excel
+    }
+
+    It "Should add a MovingAvgerage trendline" {
+
+        $cd = New-ExcelChartDefinition -XRange Region -YRange TotalSold -ChartType ColumnClustered -ChartTrendLine MovingAvgerage
+        $data | Export-Excel $xlfile -ExcelChartDefinition $cd -AutoNameRange
+
+        $excel = Open-ExcelPackage -Path $xlfile
+        $ws = $excel.Workbook.Worksheets["Sheet1"]
+
+        $ws.Drawings[0].Series.TrendLines.Type | Should Be 'MovingAvgerage'
+
+        Close-ExcelPackage $excel
+    }
+}

__tests__/ConvertFromExcelToSQLInsert.tests.ps1

@@ -1,6 +1,6 @@
 Import-Module $PSScriptRoot\..\ImportExcel.psd1 -Force
 
-$xlFile = ".\testSQL.xlsx"
+$xlFile = "$env:TEMP\testSQL.xlsx"
 
 Describe "ConvertFrom-ExcelToSQLInsert" {
 

__tests__/Path.tests.ps1

@@ -0,0 +1,38 @@
+Describe "Test reading relative paths" {
+    BeforeAll {
+        $script:xlfileName = "TestR.xlsx"
+        @{data = 1 } | Export-Excel "$pwd\TestR.xlsx"
+    }
+
+    AfterAll {
+        Remove-Item "$pwd\$($script:xlfileName)"
+    }
+
+    It "Should read local file" {
+        $actual = Import-Excel -Path ".\$($script:xlfileName)"
+        $actual | Should Not Be $null
+        $actual.Count | Should Be 1
+    }
+
+    It "Should read with pwd" {
+        $actual = Import-Excel -Path "$pwd\$($script:xlfileName)"
+        $actual | Should Not Be $null
+    }
+
+    It "Should read with just a file name and resolve to cwd" {
+        $actual = Import-Excel -Path "$($script:xlfileName)"
+        $actual | Should Not Be $null
+    }
+
+    It "Should fail for not found" {
+        { Import-Excel -Path "ExcelFileDoesNotExist.xlsx" } | Should Throw "'ExcelFileDoesNotExist.xlsx' file not found"
+    }
+
+    It "Should fail for xls extension" {
+        { Import-Excel -Path "ExcelFileDoesNotExist.xls" } | Should Throw "Import-Excel does not support reading this extension type .xls"
+    }
+
+    It "Should fail for xlsxs extension" {
+        { Import-Excel -Path "ExcelFileDoesNotExist.xlsxs" } | Should Throw "Import-Excel does not support reading this extension type .xlsxs"
+    }
+}

azure-pipelines.yml

@@ -12,4 +12,4 @@ steps:
 trigger:
   paths:
     exclude:
-    - README.md
+      - README.md