delete confirmatoin in gridview cause stop working edit common field

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C#

ASP.NET

i add delete confirmation in grid view delte common field by acessing it by the code below in row data bound event. but after that buy common fied edit stoped working .. what i have to do it to correct that

if (e.Row.RowType == DataControlRowType.DataRow)
       {
           string id = ((Label)(e.Row.FindControl("lblproname"))).Text;

           //cast the ShowDeleteButton link to linkbutton


           LinkButton lb = (LinkButton)e.Row.Cells[4].Controls[0];

           if (lb != null)
           {

               //attach the JavaScript function with the ID as the paramter

               lb.Attributes.Add("onclick", "return ConfirmOnDelete('" + id + "');");

           }