gridview中添加模版绑定dropdownlist控件,,然后点编辑控件时,如何把我的部门表的数据绑定到dropdownlist上

gridview中添加模版绑定dropdownlist控件,,然后点编辑控件时,如何把我的部门表的数据绑定到dropdownlist上,请大家帮忙!谢谢! --------------------编程问答--------------------  protected void gidview_RowDataBound(object sender, GridViewRowEventArgs e)
        {          
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                DropDownList ddl= (DropDownList)(e.Row.FindControl("对应id"));
                ddl.DataSource = 数据源;
                ddl.DataTextField = xxx;
                ddl.DataValueField = xxx;
                ddl.DataBind();
                ddl.SelectedValue = ....
             {
} --------------------编程问答-------------------- 给你个思路
你先绑定好了，你点模板列的时候，你再显示出来就可以了 --------------------编程问答-------------------- 先将GridView进入编辑模版状态，然后放一个ObjectDataSource把数据源绑定到Dropdownlist上，aspx页面代码

<asp:TemplateField HeaderText="属性分类">

    <ItemTemplate>

        <asp:Label ID="Label1" runat="server" Text='<%# Eval("iPropertySortID") %>'></asp:Label>

    </ItemTemplate>

    <EditItemTemplate>

        <asp:DropDownList ID="DDLPropertySortID" runat="server" DataSourceID="ObjectDataSourcePropertySortName" 

                DataTextField="nPropertySortName" DataValueField="iPropertySortID" ></asp:DropDownList>

        <asp:TextBox ID="txtPropertySortID" runat="server" Text='<%# Bind("iPropertySortID") %>' Visible="false"></asp:TextBox>

    </EditItemTemplate>

</asp:TemplateField>

然后在将Dropdownlist初始选择的项为当前row中所显示的项。
asp.cs代码

    //编辑状态

    protected void GridView3_RowEditing(object sender, GridViewEditEventArgs e)

    {

//转换为DDL

        string s = ((TextBox)GridView3.Rows[e.NewEditIndex].FindControl("txtPropertySortID")).Text;

        ((DropDownList)GridView3.Rows[e.NewEditIndex].FindControl("DDLPropertySortID")).SelectedValue = s;

    }

--------------------编程问答-------------------- protected void gidview_RowDataBound(object sender, GridViewRowEventArgs e) 
        {          
            if (e.Row.RowType == DataControlRowType.DataRow) 
            { 
                DropDownList ddl= (DropDownList)(e.Row.FindControl("对应id")); 
                ddl.DataSource = 数据源; 
                ddl.DataTextField = xxx; 
                ddl.DataValueField = xxx; 
                ddl.DataBind(); 
                ddl.SelectedValue = .... 
            { 
} --------------------编程问答-------------------- ddl.SelectedValue =这后面的该如何写呢? --------------------编程问答-------------------- protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {        
if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string sql = "select * from depName";
            DropDownList ddl = ((DropDownList)e.Row.FindControl("ddlyytto"));
            ddl.DataSource = this.da.getDataSet(sql);
            ddl.DataTextField = "depName";
            ddl.DataValueField = "depID";
            ddl.DataBind();
            ddl.SelectedValue = ((HiddenField)e.Row.FindControl("HiddenField")).Value;
        }

    }
我这样写报错...
      

补充：.NET技术 ,  ASP.NET