gridviews 和dropdownlist的使用

  有时候需要在gridviews里面嵌套一个dropdownlist，当dropdownlist改变时，把对应改的值更新到数据库，比如性别的选择，评审时的通过还是没有通过都需要用到这个，

　　处理办法：在dropdownlist设置属性keys，通过keys来绑定关键字，

前台代码：

<asp:GridView ID="GridView1" AutoGenerateColumns="False" Width="100%" 
                    runat="server" AllowPaging="True" 
                    onpageindexchanging="GridView1_PageIndexChanging" 
                    style="margin-bottom: 0px"  >
                    <Columns>
                        <asp:BoundField ItemStyle-Width="20%" DataField="C_NewsName" HeaderText="新闻标题" >
<ItemStyle Width="20%"></ItemStyle>
                        </asp:BoundField>
                        <asp:BoundField DataField="C_Publisher" HeaderText="发布者" />
                        <asp:BoundField DataField="C_PublishTime" HeaderText="发布时间" />
                        <asp:BoundField DataField="S_Name" HeaderText="所属部门" />
                        <asp:TemplateField>
                        <ItemTemplate >
                            <asp:HyperLink ID="HyperLink1" NavigateUrl='<%# "../NewsCOntent.aspx?CID="+Eval("C_ID") %>'  runat="server">查看</asp:HyperLink>
                        </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="审核">
                            <ItemTemplate>
                                <asp:DropDownList ID="DropDownList2" runat="server" keys='<%# Eval("C_ID") %>' 
                                    AutoPostBack="true" 
                                    onselectedindexchanged="DropDownList2_SelectedIndexChanged1">
                                <asp:ListItem Value="-1">=请选择=</asp:ListItem>
                                <asp:ListItem Value="1">通过</asp:ListItem>
                                <asp:ListItem Value="2">未通过</asp:ListItem>
                                </asp:DropDownList>
                            </ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>

后台代码：

protected void DropDownList2_SelectedIndexChanged1(object sender, EventArgs e)
    {
        DropDownList dr = sender as DropDownList;
        
        int CID = Convert.ToInt32(dr.Attributes["keys"]);
        int state = Convert.ToInt32(dr.SelectedValue);
        if (disgnose.SetNewsState(CID, state))
        {
            Common.Dialog.OpenDialog(Response, "审核成功！", "NewsDignose.aspx");
        }
        else
        {
            Common.Dialog.OpenDialog(Response, "审核失败！", "NewsDignose.aspx");
        }
    }