How to Export Gridview to pdf with out using third party tool

[newtodotnet]

Hi,
How to Export Gridview to pdf in asp.net
I searched in many forums. but many of them said to use third party tools.
I don't want any third party tools.
Suggest me any sample for without using third party tool and export Gridview to pdf
The Below code is working, When I open the Pdf file the error is showing that " Adobe reader could not open test.pdf. because the file type hasbeen damaged"

How to Resolve this?
Thanks in advance

Dim FilePath As String = "c:\test.pdf"
response.ContentType = "application/pdf"
response.AddHeader("Content-Type", "application/pdf")
response.AddHeader("Content-Disposition", "attachment; filename=" + FilePath)
response.WriteFile(FilePath)
response.end()

[debasisdas]

Hi,
How to Export Gridview to pdf in asp.net
I searched in many forums. but many of them said to use third party tools.
I don't want any third party tools.
Suggest me any sample for without using third party tool and export Gridview to pdf

develop your own component.

[Plater]

Then you will have to learn the pdf format yourself and implement it.
As far as we're aware, there is no direct .NET implementation of the PDF format, so that makes everything a third party tool if you want to do it.

Also, these lines are redundant, as they do the same thing.

response.ContentType = "application/pdf"
response.AddHeader("Content-Type", "application/pdf")