how to get selected column value or name from datagrid in asp.net using c#
<p>My code is like this : Now I have now idea how to get column name of selected row  </p>

<pre><code>protected void gv_imageslist_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
        string status;
        string sts;
        int result;
        lblerror2.Text = "";
        //((label)gv.Rows.FindControl("lbl1")).Text;

        string str = gv_imageslist.c

        if (str  == "Status")
        {
            status = ((Label)gv_imageslist.Rows[e.RowIndex].FindControl("lbl_Status")).Text;
            Gm.Gallery_Id = Convert.ToInt32(gv_imageslist.DataKeys[e.RowIndex].Value.ToString());
            if (status == "True")
            {
                Gm.Is_Active = false;
            }
            else
            {
                Gm.Is_Active = true;
            }
            result = Gm.Change_Image_Status();
            if (result == 1)
            {
                Build_ImageGalleryList();
            }
            else
            {
                lblerror2.Visible = true;
                lblerror2.Text = "Unable to Change Status !";
            }
        }
        else
        //------For Checking of cover pic
        {
            sts = ((Label)gv_imageslist.Rows[e.RowIndex].FindControl("lbl_Cover")).Text;
            Gm.Gallery_Id = Convert.ToInt32(gv_imageslist.DataKeys[e.RowIndex].Value.ToString());

            string sp = ((Label)gv_imageslist.Rows[e.RowIndex].FindControl("lbl_category_Id")).Text;
            Gm.Category_Id = Convert.ToInt32 (sp);
            if (sts == "False")
            {
                Gm.Is_Cover = true;
            }
            else
            {
                Gm.Is_Cover = false;
            }
            result = Gm.Change_Gallery_Cover();
            if (result == 1)
            {
                Build_ImageGalleryList();
            }
            else
            {
                lblerror2.Visible = true;
                lblerror2.Text = "Unable To Change Cover Pic !!";
            }
        }

    }
</code></pre>
