DataGrid中添加DropdownList时的数据绑定

在HTML中，指定DropDownList的数据源是哪个函数提供：

<asp:TemplateColumn HeaderText="发送人">
<ItemTemplate>
<asp:Label id=lblMan runat="server" Width="88px" Text='<%#DataBinder.Eval(Container,"DataItem.DManCode") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList id=dplMan2 runat="server" Width="88px" Datasource="<%#DplDatasource()%>"
DataValueField="ManCode" DataTextField="ManName" Enabled="true" AutoPostBack="True">
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateColumn>
同时在对应的C#文件中，实现DplDatasource()方法：

1protected DataSet DplDatasource()
2 {
3 DeliveryManBLL dmanBll = new DeliveryManBLL();
4 ArrayList availlist = dmanBll.GetAvailMan();
5 DataTable tb = new DataTable();
6 tb.Columns.Add("ManCode",typeof(string));
7 tb.Columns.Add("ManName",typeof(string));
8 DataRow dr = tb.NewRow();
9 dr[0] = "";
10 dr[1] = "";
11 tb.Rows.Add(dr);
12 for(int i=0;i<availlist.Count;i++)
13 {
14 dr = tb.NewRow();
15 dr[0] = ((DeliveryManInfo)availlist[i]).ManCode;
16 dr[1] = ((DeliveryManInfo)availlist[i]).ManName;
17 tb.Rows.Add(dr);
18 }
19 DataSet dset = new DataSet();
20 dset.Tables.Add(tb);
21 return dset;
22 }