Accessing gridview's header controls in ASP.Net, C#

Question

I have Gridview and the headers are having textboxs and labels, I have a search button out side of the gridview and when a user clicks on search I need to filter gridview's data by respective column's texbox values.

Answer 1

Try this

TextBox textBox = (TextBox)gridView1.HeaderRow.FindControl("contorlId");

to specifically search within a column identify the cell by the index

TextBox textBox = (TextBox)gridView1.HeaderRow.Cells[0].FindControl("contorlId");