PDFsharp & MigraDoc Foundation

public void Save(string savePath)
{
try
{
if (pdfRenderer != null)
pdfRenderer = null;

// Create a PDF renderer and render the MigraDoc document to it.
pdfRenderer = new PdfDocumentRenderer()
{
Document = reportDocument.Clone()
};

pdfRenderer.RenderDocument();

if (!File.Exists(savePath))
{
// Save the PDF document to a file.
pdfRenderer.PdfDocument.Save(savePath);
}

pdfRenderer.PdfDocument.Close();
pdfRenderer.PdfDocument.Dispose();

}
catch(Exception ex)
{
}
}

I need help for pdfRenderer.RenderDocument() , i got the following error:

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=MigraDoc.DocumentObjectModel
StackTrace:
at MigraDoc.DocumentObjectModel.Visitors.VisitorBase.VisitHeaderFooter(HeaderFooter headerFooter)
at MigraDoc.DocumentObjectModel.HeaderFooter.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
at MigraDoc.DocumentObjectModel.HeadersFooters.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
at MigraDoc.DocumentObjectModel.Section.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
at MigraDoc.DocumentObjectModel.Sections.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
at MigraDoc.DocumentObjectModel.Document.MigraDoc.DocumentObjectModel.Visitors.IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, Boolean visitChildren)
at MigraDoc.DocumentObjectModel.Visitors.VisitorBase.Visit(DocumentObject documentObject)
at MigraDoc.Rendering.DocumentRenderer.PrepareDocument()
at MigraDoc.Rendering.PdfDocumentRenderer.PrepareDocumentRenderer(Boolean prepareCompletely)
at MigraDoc.Rendering.PdfDocumentRenderer.PrepareRenderPages()
at MigraDoc.Rendering.PdfDocumentRenderer.RenderDocument()
at ReportGenerator.LatestAttachDieSummaryReport.Save(String savePath) in C:\Users\Desktop\Create PDF using PDFSharp\SummaryReport\ReportGenerator\LatestAttachDieSummaryReport.cs:line 797

Cannot reproduce.

See also:
http://forum.pdfsharp.net/viewtopic.php?f=2&t=832

_________________
Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

I found out that the root cause is because of Table.SetEdge(int clm, int row, int clms, int rows, Edge edge, BorderStyle style, Unit width).

The error below will prompt during save the document as pdf when Table.SetEdge(int clm, int row, int clms, int rows, Edge edge, BorderStyle style, Unit width) is executed after i add the table to the section. I am wondering why?

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=MigraDoc.DocumentObjectModel

Error Code:
private void DefineTableForCustomerInfo()
{
// Add an empty paragraph for spacing.
section.AddParagraph();

//Add a paragraph for the Customer Information
tableCustomerInfo = section.AddTable();
tableCustomerInfo.Format.Font.Name = ReportDocumentFontName; // Font name
tableCustomerInfo.Format.Font.Size = 9; // Adjust the font size as needed

// Create and populate the table for Customer Information
CreateAndPopulateTable(tableCustomerInfo, 5, 7, tableCustomerInfo.Format.Font.Size.Centimeter, ColumnWidthCM, false);

//Predefine the column width
double[] columnWidths = { 3.75, 0.25, 5.25, 0.5, 3.75, 0.25, 5.25 };

for (int i = 0; i < columnWidths.Length; i++)
{
FormatColumn(tableCustomerInfo.Rows[0].Cells[i], columnWidths[i]);
}

tableCustomerInfo.Rows[0].Cells[0].MergeRight = 6;
tableCustomerInfo.Rows[0].Format.Font.Bold = true;
tableCustomerInfo.Rows[0].Format.Alignment = ParagraphAlignment.Center;
tableCustomerInfo.Rows[0].Cells[0].Shading.Color = Colors.Silver;
tableCustomerInfo.Rows[0].Cells[0].AddParagraph("CUSTOMER INFORMATION");

tableCustomerInfo.SetEdge(0, 0, 1, 1, Edge.Box, BorderStyle.Single, 1);
tableCustomerInfo.SetEdge(0, 0, tableCustomerInfo.Columns.Count, tableCustomerInfo.Rows.Count, Edge.Box, BorderStyle.Single, 1);
}

Pass Code:
private void DefineTableForCustomerInfo()
{
// Add an empty paragraph for spacing.
section.AddParagraph();

//tableCustomerInfo = section.AddTable();

tableCustomerInfo = new Table();
tableCustomerInfo.Format.Font.Name = ReportDocumentFontName; // Font name
tableCustomerInfo.Format.Font.Size = 9; // Adjust the font size as needed

// Create and populate the table for Customer Information
CreateAndPopulateTable(tableCustomerInfo, 5, 7, tableCustomerInfo.Format.Font.Size.Centimeter, ColumnWidthCM, false);

//Predefine the column width
double[] columnWidths = { 3.75, 0.25, 5.25, 0.5, 3.75, 0.25, 5.25 };

for (int i = 0; i < columnWidths.Length; i++)
{
FormatColumn(tableCustomerInfo.Rows[0].Cells[i], columnWidths[i]);
}


tableCustomerInfo.SetEdge(0, 0, 1, 1, Edge.Box, BorderStyle.Single, 1);
tableCustomerInfo.SetEdge(0, 0, tableCustomerInfo.Columns.Count, tableCustomerInfo.Rows.Count, Edge.Box, BorderStyle.Single, 1);

tableCustomerInfo.Rows[0].Cells[0].MergeRight = 6;
tableCustomerInfo.Rows[0].Format.Font.Bold = true;
tableCustomerInfo.Rows[0].Format.Alignment = ParagraphAlignment.Center;
tableCustomerInfo.Rows[0].Cells[0].Shading.Color = Colors.Silver;
tableCustomerInfo.Rows[0].Cells[0].AddParagraph("CUSTOMER INFORMATION");

section.Add(tableCustomerInfo);

}

Thanks for the feedback. Still I just see code snippets.
Are you using version 6.0.0?

Cannot reproduce.

See also:
http://forum.pdfsharp.net/viewtopic.php?f=2&t=832

_________________
Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

I m using PDFsharp-MigraDoc-gdi, version 1.50.5147 as i m dealing with winform and .Net framework 4.7.2