Question

C# Windows Form - Export DataGridView rows to a certain file format - perhaps using Excel

Asked by: knowlton

I need sample code that shows how to take the data content of a DataGridView, pass that data into an IN MEMORY excel spreadsheet  (managed by C# code) and then EXPORT that data using the Excel engine out to a file format:

TAB delimited format
Comma Seperated Value (CSV)
<whatever delimiter> ---> export to text file.

or

Export as an Excel spreadsheet file  (XLS or XLSX)



Thank you,


Tom

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Asked On
2009-10-19 at 09:38:25ID24824151
Topic

C# Programming Language

Participating Experts
1
Points
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Comments
7

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Answers

 

by: TheLearnedOnePosted on 2009-10-20 at 06:24:05ID: 25613800

Tom,

The first thing that is useful is the DataGridView.GetClipboardContent.

"Retrieves the formatted values that represent the contents of the selected cells for copying to the Clipboard."

Are you using Excel interop to work with Excel?

 

by: knowltonPosted on 2009-10-20 at 22:33:03ID: 25620996

>>>>Are you using Excel interop to work with Excel?

Yes.


Since I first posted, I have been able to successfully export delimited files, and XLS.


But I still cannot create  XLSX files  (Office / Excel 2007).


Let's focus on that, if that is okay.  :)

 

by: TheLearnedOnePosted on 2009-10-21 at 03:53:43ID: 25622545

Excel 2007 files are a little troublesome, because they are compressed XML files.  If they were just text files, you could just use an XmlTextWriter, and create files.  

I haven't used anything to create .xslx files, but you might look at this:

How to read and write Open XML files (MS Office 2007)
http://www.gemboxsoftware.com/Excel2007/DemoApp.htm

 

by: knowltonPosted on 2009-10-21 at 08:46:07ID: 25625149

How can I convert this code to C#?

Dim app As New Excel.Application
Dim book As Excel.Workbook = app.Workbooks.Add()
book.SaveAs(Filename:="C:\Book1.xlsx", FileFormat:=51)
book.Close()
app.Quit()


Particularly this line:

book.SaveAs(Filename:="C:\Book1.xlsx", FileFormat:=51)


FileFormat = 51?????

 

by: TheLearnedOnePosted on 2009-10-21 at 09:27:59ID: 25625578

I forgot that you are using Excel Interop (d'oh).

Until you get C# 2010, which will support optional parameters like VB.NET, you will have to get all the arguments:



           Application app = new Application();
            Workbook book = app.Workbooks.Add(null);
            book.SaveAs(@"C:\Book1.xlsx", XlFileFormat.xlExcel12, Missing.Value, Missing.Value, Missing.Value, 
                Missing.Value, XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
            book.Close(true, Missing.Value, Missing.Value);
            app.Quit();
                                              
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Select allOpen in new window

 

by: knowltonPosted on 2009-10-21 at 14:35:10ID: 25628754

This extension can not be used with the selected file type. Change the file extension in the File name text box or select a different file type by changing the Save as type.

When using XlFileFormat.xlExcel12

 

by: knowltonPosted on 2009-10-21 at 14:41:09ID: 25628807

Apparently this works:

Microsoft.Office.Interop.Excel.XlFileFormat.xlOpenXMLWorkbook

as in:

theWorkbook.SaveAs(path, Microsoft.Office.Interop.Excel.XlFileFormat.xlOpenXMLWorkbook, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

20120131-EE-VQP-002

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