UpdatePanel异常处理

在使用UpdatePanel时,可以使用脚本管理器(服务器端)上的AsyncPostBackError事件和PageRequestManager(客户端)上的EndRequest事件的组合来完全处理服务器端错误。

这里有几个资源可以帮助您:

Customizing Error Handling for ASP.NET UpdatePanel Controls

Error Handling Customization for ASP.NET UpdatePanel

下面是一个简单的例子:

// Server-side
protected void ScriptManager1_AsyncPostBackError(object sender, 
    AsyncPostBackErrorEventArgs e)  {
    ScriptManager1.AsyncPostBackErrorMessage =
        "An error occurred during the request: " +
        e.Exception.Message; 
}


// Client-side
<script type="text/javascript">
  function pageLoad()  {
    Sys.WebForms.PageRequestManager.getInstance().
        add_endRequest(onEndRequest);  
  }

  function onEndRequest(sender, args)  {
    var lbl = document.getElementById("Label1");
    lbl.innerHTML = args.get_error().message;
    args.set_errorHandled(true);
  }
</script>

如果只想修复浏览器javascript错误并向用户显示异常消息,只需在表单声明之后的某个地方将其添加到母版页:

<!-- This script must be placed after the form declaration -->
<script type="text/javascript">
    Sys.Application.add_load(AppLoad);

    function AppLoad() {
        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequest);
    }

    function EndRequest(sender, args) {
        // Check to see if there's an error on this request.
        if (args.get_error() != undefined) {

            var msg = args.get_error().message.replace("Sys.WebForms.PageRequestManagerServerErrorException: ", "");

            // Show the custom error. 
            // Here you can be creative and do whatever you want
            // with the exception (i.e. call a modalpopup and show 
            // a nicer error window). I will simply use 'alert'
            alert(msg);

            // Let the framework know that the error is handled, 
            //  so it doesn't throw the JavaScript alert.
            args.set_errorHandled(true);
        }
    }
</script>

您不需要捕获OnAsyncPostbackError,即使您不想自定义消息。 Go to my blog post if you want more information about this.

您是否可以重写页级错误方法,捕获异常并处理您认为合适的方式?

protected override void OnError(EventArgs e)
{
    //show error message here
}