You have VB.NET so this may not help you, but here is some code that I used in the past for PDFSharp to merge Multiple files if you want to switch to C# or use this to compare to yours or rewrite in VB.NET:
Inputs:
[inputPaths] (DataTable) expecting either just one column or one of the columns to be named "Path".
[newFileName] (Text)
[outputFolderPath] (Text)
Outputs:
[outputFilePath] (Text)
External References:
System
System.Data.dll
System.Drawing.dll
PdfSharp.dll
System.Linq.dll
System.Collections.dll
System.Core.dll
Namespace Imports:
System
System.Drawing
System.Data
System.Diagnostics
System.IO
PdfSharp.Pdf
PdfSharp.Pdf.IO
System.Linq
System.Collections
System.Collections.Generic
System.Threading.Tasks
System.Text.RegularExpressions
System.Text
PdfSharp.Pdf.Content
PdfSharp.Pdf.Content.Objects
PdfSharp.Pdf.Advanced
// set up some variables
string[] files;
if (inputPaths.Columns.Count > 1)
{
// get a string array out of the Path column
files = inputPaths.Rows.OfType<DataRow>().Select(k => k["Path"].ToString()).ToArray();
}
else
{
// get a string array out of a DataTable regardless of the Field Name
files = inputPaths.Rows.OfType<DataRow>().Select(k => k[0].ToString()).ToArray();
}
if (string.IsNullOrEmpty(newFileName))
{
newFileName = Path.GetFileNameWithoutExtension(files[0]) + "_merged";
}
else
{
newFileName = Path.GetFileNameWithoutExtension(newFileName);
}
if (string.IsNullOrEmpty(outputFolderPath))
{
outputFolderPath = Directory.GetParent(files[0]).ToString();
}
outputPath = Path.Combine(outputFolderPath, newFileName + ".pdf");
// Open the output document
PdfDocument outputDocument = new PdfDocument();
// Iterate files
foreach (string file in files)
{
// Open the document to import pages from it.
PdfDocument inputDocument = PdfReader.Open(file, PdfDocumentOpenMode.Import);
// Iterate pages
int count = inputDocument.PageCount;
for (int idx = 0; idx < count; idx++)
{
// Get the page from the external document...
PdfPage page = inputDocument.Pages[idx];
// ...and add it to the output document.
outputDocument.AddPage(page);
}
}
// Save the document...
outputDocument.Save(outputPath);
Dave Morris, 3Ci at Southern Company
