return跳出foreach循环

foreach(DataGridItem oDataGridItem in ExDataGrid1.Items)
            {
                chkExport=(CheckBox)oDataGridItem.FindControl("chkExport");
                if(chkExport.Checked)
                {
                    sID=((HtmlInputHidden)oDataGridItem.FindControl("SelectID")).Value;
                    im.DeleInternalEmail(Convert.ToInt32(sID));
                }
                else
                {
                    Aipetech.Framework.Common.Common.Alert("请选择要 [ 彻底删除 ] 的记录");
                    return;
                }
            }