1、绑定在DataList中的DropDownList

private void dlistOrder_EditCommand(object source, System.Web.UI.WebControls.DataListCommandEventArgs e)
{
 //绑定订单状态
 for(int i=0;i<((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items.Count;i++)
 {
  if(((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items[i].Value == dv.Table.Rows[0]["OrStatus"].ToString())
  {
   ((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items[i].Selected = true;
  }
 }
}

2、另一种绑定方式

//绑定送货方式
    DataView shipType = OrderSO.GetShipTypeList();
    DropDownList ddlShipType = (DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlShipType");
    ddlShipType.DataSource = shipType;
    ddlShipType.DataTextField = "StName";
    ddlShipType.DataValueField = "StId";
    ddlShipType.DataBind();
    ddlShipType.SelectedIndex = ddlShipType.Items.IndexOf(ddlShipType.Items.FindByValue(dv.Table.Rows[0]["OrShipType"].ToString()));

3、在编辑嵌套在Datalist内的Datagrid某条记录时定位它所在的Datalist行

protected void MyList_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
  {
   if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
   {
    HtmlInputHidden odid  = (HtmlInputHidden) e.Item.Cells[0].FindControl("odid");

    DataListItem item = (DataListItem)e.Item.Parent.Parent.Parent;
    DropDownList flag = (DropDownList)item.FindControl("ddlFlag");
    if(flag.SelectedIndex == 0)
    {
     if(e.CommandName == "Delete")
     {
      int iOdId = Convert.ToInt32(odid.Value);
      //删除订单明细方法
      OrderSO.DeleteOrderDetail(iOdId);
     }
    }
    else
    {
     GDCIC.Framework.Utility.MessageBox(this,"modifyError","经过确认的订单不能再修改!!");
     return;
    }

    dlistOrder.EditItemIndex = -1;
    BindData();
   }
  }

4、DataBinding绑定表达式：

1) 普通的绑定表达式
<%# DataBinder.Eval(Container.DataItem, "ContactName") %>

2) 文本+绑定表达式
<asp:Label id=lblDate runat="server" Text='<%# "[" + DataBinder.Eval(Container, "DataItem.NewsCreatedate") + "]" %>' ForeColor="Red"></asp:Label>

3) 同时带有显示格式的绑定表达式
<%# DataBinder.Eval(Container,"DataItem.USActiveDate","{0:yyyy-MM-dd}") %>

4) 结合绑定表达式和模态框
<A href='<%# ShowModalWin(Convert.ToString(DataBinder.Eval(Container.DataItem, "PictureImage")),Convert.ToString(DataBinder.Eval(Container.DataItem, "DetailID")),Convert.ToString(DataBinder.Eval(Container.DataItem, "PictureID")))%>'>

其中：后台代码文件中ShowModalWin()方法的定义如下：
protected string ShowModalWin(string PictureImage,string DetailID,string PictureID)
{
 return " window.showModalDialog(\"Customers/ShowPictureInfo.aspx?pid="+PictureImage+"&did="+DetailID+"&id="+PictureID+"\",\"\",\"dialogHeight:320px;dialogWidth:480px;center:yes;help:no;status:no;scroll:no\");";
}

或者将参数提取出来