彈出錯誤對話框

StringBuilder sb = new StringBuilder(); 
sb.Append("<script language=\"javascript\"> \n"); 
sb.Append("alert(\"" + str.Trim() + "\"); \n"); 
sb.Append("</script>"); 
System.Web.HttpContext.Current.Response.Write(sb.ToString()); 


如果要關閉目前頁面的話在script中間加入


"window.close();\n"