dropDownlist
DropDownList   ddlregion=(DropDownList)e.Item.FindControl( "drpregion ");
ddlregion.SelectedIndexChanged   +=   new   EventHandler(this.ddlregion_change);
ViewState[ "thiscountry "]=e.Item.ItemIndex;


public   void   ddlregion_change(object   sender,   System.EventArgs   e)
{
DropDownList   Drp=(DropDownList)sender;
string   region=Drp.SelectedItem.Value;
DataGridItem   item=this.listDG.Items[(int)ViewState[ "thiscountry "]];
item.FindControl( " ");
DropDownList   ddlcountry=(DropDownList)   item.FindControl( "drpcountry ");   //(DropDownList)this.listDG.FindControl();
ddlcountry.DataSource=Components.Region.getCountryGroup(region);
ddlcountry.DataTextField= "code ";
ddlcountry.DataValueField= "region ";
ddlcountry.DataBind();
}

------解决方案--------------------
你想干什么？
------解决方案--------------------
怎么了?