how to update row in grid view.

Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles GridView1.RowUpdating nm = CType(GridView1.Rows(e.RowIndex).Cells(2).Controls(0), TextBox).Text sal = Convert.ToDouble(CType(GridView1.Rows(e.RowIndex).Cells(3).Controls(0), TextBox).Text) conn.Open() cmd = New SqlCommand cmd.CommandText = "update emptb set name=@e2,salary=@e3 where code=@e1" cmd.Parameters.Add("@e1", SqlDbType.Int).Value = GridView1.DataKeys(e.RowIndex).Value(0) cmd.Parameters.Add("@e2", SqlDbType.NVarChar).Value = nm cmd.Parameters.Add("@e3", SqlDbType.Money).Value = sal cmd.Connection = conn cmd.ExecuteNonQuery() cmd.Dispose() conn.Close() GridView1.EditIndex = -1 bind() Public Sub bind() adp = New SqlDataAdapter("select * from emptb", str) ds = New DataSet adp.Fill(ds) GridView1.DataSource = ds GridView1.DataBind() ds.Clear() adp.Dispose() End Sub html code is:

i used emptb=table with three fields code,name, salary please tell me solution as soon as posible.