How to get scroll option for pdf file after export to pdf using C# coding.

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C#2.0

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How to get scroll option for pdf file after export to pdf using C# coding.
I am exporting gridview data to pdf. Gridview has more number of coloumns,and as there are more no. of coloumns the data in gridview is getting disturbed and few coloumns breaking and forming as another table. how can i solve this problem,i expect i need to set fontsize of coloumns and adjust gridview size to page or set scroll for the pdf file after exporting.
Can anyone please help how to do it.