Control 'grdstudent' of type 'GridView' must be placed inside a form tag with runat=server

Introduction: in this artcile I will explain how to resolve the problem Control 'grdstudent' of type 'GridView' must be placed inside a form tag with runat=server when Export Data from Data controls i.e. Gridview, Datalist etc.

Description:

In the last article i have explained A page can have only one server-side Form tag.

Error occur when we try to Export the Data from Controls to Pdf, Excel, Word, CSV. To resolve this problem add one function:

public override void VerifyRenderingInServerForm(Control control)

    {

        /* Verifies that the control is rendered */

    }

After adding this fuction in code behind the problem has been resolved. It would solve you problem.