problem in updating the gridview in asp.net 2005 with c# language

[priyamsc]

hi, i have used gridview in asp.net 2005 wit c#.i need to update my datas.in tat i hv placed dropdownlist,checkbox controls.but its not updating the datas.when i edit the row,we have dropdownlist but not tat database value.so when i edit the row the database value should be in dropdown list.when i click update link i got this error.The GridView 'GridView1' fired event RowUpdating which wasn't handled.so pls help me to do this. this is coding ----------------- protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e) { GridViewRow gv = null; string k = string.Format(GridView1.Rows[gv.RowIndex].Cells[4].Text); Response.Write(k); TextBox t1, t2, t3, t4, t5,t6,t7,t8,t9,t10,t11; DropDownList d1, d2, d3, d4,d5; CheckBox cdr, cdrw, cdvdr, cdvdrw, cfdd, cinter, cwa; t1 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[5].Controls[1]; t2 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[6].Controls[1]; t3 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[7].Controls[1]; t4 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[8].Controls[1]; t5 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[9].Controls[1]; t6 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[10].Controls[1]; t7 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[11].Controls[1]; t8 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[18].Controls[1]; t9 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[20].Controls[1]; t10 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[21].Controls[1]; t11 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[22].Controls[1]; d1 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[0].Controls[0]; d2 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[1].Controls[0]; d3 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[2].Controls[0]; d4 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[3].Controls[0]; d5 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[23].Controls[0]; cdr = (CheckBox)GridView1.Rows[gv.RowIndex].Cells[12].Controls[2]; cdrw = (CheckBox)GridView1.Rows[gv.RowIndex].Cells[13].Controls[2]; cdvdr =(CheckBox)GridView1.Rows[gv.RowIndex].Cells[14].Controls[2]; cdvdrw=(CheckBox)GridView1.Rows[gv.RowIndex].Cells[15].Controls[2]; cfdd = (