有什么方法可以在jQueryAJAX错误消息中显示自定义异常消息作为警报吗?
例如,如果我想通过抛出新的ApplicationException(“用户名已经存在”),通过Struts在服务器端抛出异常;,我想在jQueryAJAX错误消息中捕获此消息(“用户名已存在”)。
jQuery("#save").click(function () {
if (jQuery('#form').jVal()) {
jQuery.ajax({
type: "POST",
url: "saveuser.do",
dataType: "html",
data: "userId=" + encodeURIComponent(trim(document.forms[0].userId.value)),
success: function (response) {
jQuery("#usergrid").trigger("reloadGrid");
clear();
alert("Details saved successfully!!!");
},
error: function (xhr, ajaxOptions, thrownError) {
alert(xhr.status);
alert(thrownError);
}
});
}
});
在错误回调中的第二个警报中,我向thrownError发出警报,我得到了未定义,xhr.status代码为500。
我不知道我错在哪里。我可以做什么来解决这个问题?
$("#fmlogin").submit(function(){
$("#fmlogin").ajaxError(function(event,xhr,settings,error){
$("#loading").fadeOut('fast');
$("#showdata").fadeIn('slow');
$("#showdata").html('Error please, try again later or reload the Page. Reason: ' + xhr.status);
setTimeout(function() {$("#showdata").fadeOut({"opacity":"0"})} , 5500 + 1000); // delays 1 sec after the previous one
});
});
如果有任何表单,请提交并验证
只需使用代码的其余部分
$("#fmlogin").validate({...
......});
这就是我所做的,它目前在MVC 5应用程序中运行。
控制器的返回类型为ContentResult。
public ContentResult DoSomething()
{
if(somethingIsTrue)
{
Response.StatusCode = 500 //Anything other than 2XX HTTP status codes should work
Response.Write("My Message");
return new ContentResult();
}
//Do something in here//
string json = "whatever json goes here";
return new ContentResult{Content = json, ContentType = "application/json"};
}
在客户端,这是ajax函数的样子
$.ajax({
type: "POST",
url: URL,
data: DATA,
dataType: "json",
success: function (json) {
//Do something with the returned json object.
},
error: function (xhr, status, errorThrown) {
//Here the status code can be retrieved like;
xhr.status;
//The message added to Response object in Controller can be retrieved as following.
xhr.responseText;
}
});
jQuery.parseJSON对于成功和错误都很有用。
$.ajax({
url: "controller/action",
type: 'POST',
success: function (data, textStatus, jqXHR) {
var obj = jQuery.parseJSON(jqXHR.responseText);
notify(data.toString());
notify(textStatus.toString());
},
error: function (data, textStatus, jqXHR) { notify(textStatus); }
});
控制器:
public class ClientErrorHandler : FilterAttribute, IExceptionFilter
{
public void OnException(ExceptionContext filterContext)
{
var response = filterContext.RequestContext.HttpContext.Response;
response.Write(filterContext.Exception.Message);
response.ContentType = MediaTypeNames.Text.Plain;
filterContext.ExceptionHandled = true;
}
}
[ClientErrorHandler]
public class SomeController : Controller
{
[HttpPost]
public ActionResult SomeAction()
{
throw new Exception("Error message");
}
}
查看脚本:
$.ajax({
type: "post", url: "/SomeController/SomeAction",
success: function (data, text) {
//...
},
error: function (request, status, error) {
alert(request.responseText);
}
});