Refined fix for #419

Export-Excel.ps1

@@ -464,6 +464,7 @@
     )
 
     Begin {
+        $numberRegex = [Regex]'\d'
         function Add-CellValue {
             <#
               .SYNOPSIS
@@ -530,7 +531,7 @@
                 Default {
                     #Save a value as a number if possible
                     $number = $null
-                    if (($_ -match '[0-9]')-and [Double]::TryParse($_, [System.Globalization.NumberStyles]::Any, [System.Globalization.NumberFormatInfo]::CurrentInfo, [Ref]$number)) {
+                    if ($numberRegex.IsMatch($_) -and [Double]::TryParse($_, [System.Globalization.NumberStyles]::Any, [System.Globalization.NumberFormatInfo]::CurrentInfo, [Ref]$number)) {
                         # as simpler version using [Double]::TryParse( $_ , [ref]$number)) was found to cause problems reverted back to the longer version
                         $TargetCell.Value = $number
                         if ($setNumformat) {$targetCell.Style.Numberformat.Format = $Numberformat }

README.md

@@ -51,7 +51,8 @@ Install-Module ImportExcel -scope CurrentUser
 ```PowerShell
 Install-Module ImportExcel
 ```
-# New to Aug 13th
+# New to Aug 14th
+- In Export-Excel improved the catch-all handler for insering values to cope better with nested objects and reduce the number of parse operations 
 - Added -Calculate switch to Export-Excel and Close-Excel Package; EPPlus needs formulas to OMIT the leading = sign so where formula is set it now strips a leading =  
 - Added -PivotTotals parameter where there was already -NoTotalsInPivot new one allows None, Both, Rows, Columns. (#415)
 - When appending Export-Excel only extended tables and ranges if they were explicitly specified. It now does it automatically.