Selecting a value in a GridView

foreach (GridViewRow item in GridView1.Rows)
       {
           string str= item.Cells[i].Text;
       }

Or
you can add a ItemTemplate to Rows and add a Button to Template.Add Bind the parameter "CommandName " and "CommandArgument".

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "Detail")
            {
                e.CommandArgument.ToString();
            }
}

Use rowcommand event

int index = Convert.ToInt32(e.CommandArgument);
               GridViewRow row = GridView1.Rows[index];
               lblassinmentno.Text = row.Cells[1].Text;

Hiiiii !!!!!!

I can understand your question. But think about what is the purpose of updatepanel?
Updatepanel is ajax control. So ajax control not post back any data to server. That's why your button does not work. if you are not using updatepanel that your gridview event should be fire and data post back to server.

Your simply answer is that you should fine some java script for call update panel event.









Thank You.
Patel Azharuddin
Software Engineer.
India
Phone: +919998392908