ExcelFileHandling

Install-Dependencies.ps1

@@ -53,14 +53,14 @@ catch {
     1. Microsoft Excel 2013 or newer
     2. PowerShell must run in STA mode
     Run the main script like this:
-    powershell.exe -STA -File .\MainForm.ps1
+    pwsh -STA -File .\MainForm.ps1
 "@ -ForegroundColor Red
     exit 1
 }
 
 Write-Host @"
 Installation complete! Run the main application with:
-powershell.exe -STA -File .\MainForm.ps1
+pwsh -STA -File .\MainForm.ps1
 
 Note: First run might take longer while modules load
 "@ -ForegroundColor Green

README.md

@@ -6,9 +6,29 @@ This tool allows you to convert legacy `.xls` files stored in SharePoint to the
 
 ### Step 1: Install PowerShell 7.5
 
+**Option 1: Manual Installation**
 1. Visit the [PowerShell GitHub releases page](https://github.com/PowerShell/PowerShell/releases)
 2. Download the appropriate installer for your system (e.g., `PowerShell-7.5.0-win-x64.msi` for 64-bit Windows)
 3. Run the installer and follow the on-screen instructions
+
+**Option 2: Install using winget (Windows 10/11)**
+1. Open a command prompt or PowerShell window
+2. Run the following command:
+   ```
+   winget install --id Microsoft.PowerShell
+   ```
+
+**Option 3: Install using PowerShell script**
+1. Open Windows PowerShell as administrator
+2. Run the following commands:
+   ```powershell
+   # Download the installation script
+   Invoke-WebRequest -Uri https://aka.ms/install-powershell.ps1 -OutFile install-powershell.ps1
+
+   # Install PowerShell 7.5
+   .\install-powershell.ps1 -UseMSI -Quiet
+   ```
+
 4. Verify the installation by opening PowerShell 7 from the Start menu
 
 ### Step 2: Install Required Dependencies
@@ -17,7 +37,7 @@ This tool allows you to convert legacy `.xls` files stored in SharePoint to the
 2. Right-click on PowerShell 7 in the Start menu and select "Run as administrator"
 3. Navigate to the folder containing the converter files:
    ```
-   cd C:\path\to\XLS_to_XLSX
+   cd C:\path\to\SharepointXLS_to_XLSX
    ```
 4. Run the dependency installer script:
    ```
@@ -37,7 +57,7 @@ This tool allows you to convert legacy `.xls` files stored in SharePoint to the
 1. Open PowerShell 7 as administrator
 2. Navigate to the application folder:
    ```
-   cd C:\path\to\XLS_to_XLSX
+   cd C:\path\to\SharepointXLS_to_XLSX
    ```
 3. Run the application in STA mode:
    ```

SharePointFunctions.ps1

@@ -473,7 +473,7 @@ function Convert-Files {
                 try {
                     # Create a safe temporary path without spaces
                     $safeTempDir = Join-Path $env:TEMP "XLSConversion"
-                    if (-not (Test-Path $safeTempDir)) {
+                    if (-not (Test-Path -Path $safeTempDir)) {
                         New-Item -ItemType Directory -Path $safeTempDir -Force | Out-Null
                     }
                     
@@ -494,8 +494,16 @@ function Convert-Files {
                     }
                     
                     $script:txtStatus.Text += "Opening workbook from: $safeOriginalPath`n"
+                    try {
+                        # Try opening with different recovery options
                         try {
                             $workbook = $excel.Workbooks.Open($safeOriginalPath)
+                        }
+                        catch {
+                            $script:txtStatus.Text += "Standard open failed, trying with OpenAndRepair...`n"
+                            $workbook = $excel.Workbooks.OpenAndRepair($safeOriginalPath)
+                        }
+                        
                         $script:txtStatus.Text += "Workbook opened successfully`n"
                         
                         # Create safe XLSX path
@@ -505,17 +513,74 @@ function Convert-Files {
                         
                         $script:txtStatus.Text += "Attempting to save as XLSX: $safeXlsxPath`n"
                         
+                        # Try multiple SaveAs approaches with progressive fallbacks
+                        $saveSuccess = $false
+                        
+                        # Approach 1: Standard SaveAs with explicit format
                         try {
-                            # Try different SaveAs approaches
-                            try {
-                                # Approach 1: Use FileFormat property
-                                $excel.DefaultSaveFormat = 51  # xlOpenXMLWorkbook
-                                $workbook.SaveAs($safeXlsxPath)
+                            $script:txtStatus.Text += "Trying standard SaveAs method...`n"
+                            $excel.DisplayAlerts = $false
+                            $workbook.SaveAs([string]$safeXlsxPath, [int]51) # 51 = xlOpenXMLWorkbook
+                            $saveSuccess = $true
                         }
                         catch {
-                                $script:txtStatus.Text += "First save attempt failed, trying alternate method...`n"
-                                # Approach 2: Use explicit FileFormat
+                            $script:txtStatus.Text += "Standard SaveAs failed: $($_.Exception.Message)`n"
+                        }
+                        
+                        # Approach 2: Try with compatibility options disabled
+                        if (-not $saveSuccess) {
+                            try {
+                                $script:txtStatus.Text += "Trying SaveAs with compatibility options disabled...`n"
+                                $excel.DisplayAlerts = $false
+                                if ($workbook.PSObject.Properties.Name -contains "CheckCompatibility") {
+                                    $workbook.CheckCompatibility = $false
+                                }
                                 $workbook.SaveAs([string]$safeXlsxPath, [int]51)
+                                $saveSuccess = $true
+                            }
+                            catch {
+                                $script:txtStatus.Text += "Compatibility SaveAs failed: $($_.Exception.Message)`n"
+                            }
+                        }
+                        
+                        # Approach 3: Try with Excel 2007-2013 format
+                        if (-not $saveSuccess) {
+                            try {
+                                $script:txtStatus.Text += "Trying SaveAs with Excel 2007-2013 format...`n"
+                                $excel.DisplayAlerts = $false
+                                $workbook.SaveAs([string]$safeXlsxPath, [int]52) # 52 = xlExcel12 (Excel 2007-2013)
+                                $saveSuccess = $true
+                            }
+                            catch {
+                                $script:txtStatus.Text += "Excel 2007-2013 SaveAs failed: $($_.Exception.Message)`n"
+                            }
+                        }
+                        
+                        # Approach 4: Last resort - try with Excel binary format then convert again
+                        if (-not $saveSuccess) {
+                            try {
+                                $script:txtStatus.Text += "Trying intermediate binary format conversion...`n"
+                                $excel.DisplayAlerts = $false
+                                
+                                # First save as Excel Binary Workbook
+                                $safeBinaryPath = [System.IO.Path]::ChangeExtension($safeXlsxPath, ".xlsb")
+                                $workbook.SaveAs([string]$safeBinaryPath, [int]50) # 50 = xlExcel12 (Excel Binary)
+                                $workbook.Close($false)
+                                
+                                # Then open the binary and save as XLSX
+                                $binaryWorkbook = $excel.Workbooks.Open($safeBinaryPath)
+                                $binaryWorkbook.SaveAs([string]$safeXlsxPath, [int]51)
+                                $binaryWorkbook.Close($false)
+                                
+                                $saveSuccess = $true
+                            }
+                            catch {
+                                $script:txtStatus.Text += "Binary conversion failed: $($_.Exception.Message)`n"
+                            }
+                        }
+                        
+                        if (-not $saveSuccess) {
+                            throw "All conversion methods failed. Unable to convert file."
                         }
                         
                         Start-Sleep -Seconds 2  # Give the file system time to catch up
@@ -535,19 +600,12 @@ function Convert-Files {
                         $script:txtStatus.Text += "Successfully saved XLSX file`n"
                     }
                     catch {
-                            $script:txtStatus.Text += "Error during SaveAs: $($_.Exception.Message)`n"
-                            if ($_.Exception.HResult) {
-                                $script:txtStatus.Text += "Error HResult: $($_.Exception.HResult)`n"
-                            }
-                            throw
-                        }
-                    }
-                    catch {
-                        $script:txtStatus.Text += "Error opening workbook: $($_.Exception.Message)`n"
+                        $script:txtStatus.Text += "Error during Excel operations: $($_.Exception.Message)`n"
                         throw
                     }
                 }
                 finally {
+                    # Thorough cleanup of Excel objects
                     if ($workbook) {
                         try {
                             $workbook.Close($false)
@@ -556,6 +614,14 @@ function Convert-Files {
                         catch { }
                         $workbook = $null
                     }
+                    if ($binaryWorkbook) {
+                        try {
+                            $binaryWorkbook.Close($false)
+                            [System.Runtime.Interopservices.Marshal]::ReleaseComObject($binaryWorkbook) | Out-Null
+                        }
+                        catch { }
+                        $binaryWorkbook = $null
+                    }
                     if ($excel) {
                         try {
                             $excel.Quit()