GridView中使用DropDownList的OnSelectedIndexChanged事件

今天遇到了在GridView中使用DropDownList的OnSelectedIndexChanged事件。在此小结下，方便博友们参考哈。

前台代码：

<asp:TemplateField HeaderText="分值" ItemStyle-HorizontalAlign="Center">
                            <ItemTemplate>
                                <asp:DropDownList ID="GradeList"  runat="server" Width="100px" OnSelectedIndexChanged="dd_SelectedIndexChanged"
                                    AutoPostBack="true">
                                    <asp:ListItem></asp:ListItem>
                                    <asp:ListItem>0</asp:ListItem>
                                    <asp:ListItem>10</asp:ListItem>
                                    <asp:ListItem>20</asp:ListItem>
                                    <asp:ListItem>30</asp:ListItem>
                                    <asp:ListItem>40</asp:ListItem>
                                    <asp:ListItem>50</asp:ListItem>
                                    <asp:ListItem>60</asp:ListItem>
                                    <asp:ListItem>70</asp:ListItem>
                                    <asp:ListItem>80</asp:ListItem>
                                    <asp:ListItem>90</asp:ListItem>
                                    <asp:ListItem>100</asp:ListItem>
                                </asp:DropDownList>
                            </ItemTemplate>
</asp:TemplateField>

后台OnSelectedIndexChanged事件：

/// <summary>
    /// 评分
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void dd_SelectedIndexChanged(object sender, EventArgs e)
    {
        GridViewRow gvr = (GridViewRow)((Control)sender).Parent.Parent;
        DropDownList ddl = (DropDownList)sender;//获得GridView1中的DropDownList1控件

        //也可以这样写 
        //GridViewRow row = (GridViewRow)ddl.Parent.Parent;
        //GridViewRow row1 = (GridViewRow)ddl.NamingContainer;//通过ddl控件找到所在的行
        //int aa = Convert.ToInt32(row1.RowIndex.ToString());//获得行的rowindex
        QueryBuilder qb = new QueryBuilder();
        qb.AddFilter("MIS_GradeInfo.SF_UserID", WebCommon.SQL_EQUAL, gvr.Cells[0].Text);
        qb.AddFilter("MIS_GradeInfo.DF_Week", WebCommon.SQL_EQUAL, gvr.Cells[2].Text);
        IList<MIS_GradeInfoModel> MIS_GradeInfoModel = bll.GetMIS_GradeInfoModelByCondition(qb);
        if (MIS_GradeInfoModel.Count > 0)
        {
            model = MIS_GradeInfoModel[0];
            model.DF_UserID = UserNum.Value;
            model.DF_UserName = UserName.Text;
            model.GradeNum = ddl.SelectedValue.ToString();//获得选择的值
            model.DF_Flag = 1;//表示打分标识
            model.DF_Date = DateTime.Now.ToShortDateString();
            model.Up_DF_Date = DateTime.Now.ToShortDateString();
            bll.Update_MIS_GradeInfo(model);
        }
        

    }