Hi Ressal M N R,
Thank you for posting here.
According to your description, if you want to import excel to gridview, you could refer to the example in the following links.
http://www.c-sharpcorner.com/UploadFile/75a48f/read-excel-sheet-data-and-bind-with-asp-net-gridview/
https://www.aspsnippets.com/Articles/Import-data-from-Excel-to-GridView-in-ASPNet.aspx
Per my understanding, the issue is related to gridview. To solve it ASAP, you can post it with the gridview aspx code in the ASP.NET forum.
ASP.NET forum: https://forums.asp.net/
Best Regards,
Wendy
MSDN Community Support
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