错误:
指定的参数已超出有效值的范围。
参数名: index register.U_Id = Convert.ToInt32(((TextBox)row.Cells[0].Controls[0]).Text.ToString());程序:    protected void GVregister_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        BNU_register note = new BNU_register();
        U_register register = new U_register();        GridViewRow row = this.GVregister.Rows[e.RowIndex];        register.U_Id = Convert.ToInt32(((TextBox)row.Cells[0].Controls[0]).Text.ToString());        //bool state;
        // state = note.BN_GetDatetime(qdt, edt, GVregister);
        //GVregister.DeleteRow(e.RowIndex);
        //GVorder.EditIndex = -1;
    }请高手指点!