GridView中使用DropDownList的OnSelectedIndexChanged事件

<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>

/// <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);
}

}