添加OnItemDataBound="myDataGrid_ItemDataBound"事件CS中加代码
public void myDataGrid_ItemDataBound(Object sender, DataGridItemEventArgs e) 
{
DropDownList ddl=new DropDownList();
DataRowView drv = (DataRowView) e.Item.DataItem;

if(e.Item.ItemType==ListItemType.EditItem)
{
try
{
string CurrentSelectItem; //语言范围
ddl=(DropDownList)e.Item.FindControl("edit_ddllang");
ddl.Items.Add("中文");
ddl.Items.Add("英文");
ddl.Items.Add("日文"); CurrentSelectItem=drv["lang"].ToString();
ddl.SelectedIndex=ddl.Items.IndexOf(ddl.Items.FindByValue(CurrentSelectItem));
}
catch
{
}
}
}