CODEWITHSUNDEEP
c#asp.netjquery
Zholen
Zholen

Reputation: 1790

How to return custom exception message to Ajax call?

I want to return a specific message on error of an ajax request.

[WebMethod]
public static AjaxReturnObject SubmitWager(string token, string track, string race, string amount, string pool, string runners)
{
    try
    {
        var serviceReturn = Services.Account.SubmitWager("", track, race, pool, amount, runners);
        return new AjaxReturnObject(serviceReturn.AccountToken, serviceReturn.Payload);
    }
    catch (CustomServiceException<string> e)
    {
        throw new Exception(e.Message);
    }
}

Debugging says that it hits my catch when I need it to, but when I look at the xhr within my jquery ajax call it ALWAYS says "There was an error processing the request."

error: function (xhr, textStatus, errorThrown) {
            log(xhr, textStatus, errorThrown);
}

How can I get my desired message to comeback to the ajax call under xhr.responseText?

Upvotes: 1

Views: 10242

Answers (2)

Pawan
Pawan

Reputation: 605

Try just Throw instead of Throw new in the catch block. and once u parse the XHR.responseText, the exception message will be contained in "Message" For ex:

$.ajax({
       type: "POST",
       //... other parameters
       error: function(XHR, errStatus, errorThrown) {
             var err = JSON.parse(XHR.responseText);
             errorMessage = err.Message;
       }
});

Upvotes: 4

Brenton
Brenton

Reputation: 125

Perhaps the better route would be is to define the success callback of the AJAX request with code that checks a success flag:

c#

[WebMethod]
public static AjaxReturnObject SubmitWager(string token, string track, string race,   string amount, string pool, string runners)
{
try
{
    var serviceReturn = Services.Account.SubmitWager("", track, race, pool, amount, runners);
    return new AjaxReturnObject(serviceReturn.AccountToken, serviceReturn.Payload);
}
catch (CustomServiceException<string> e)
{
    return new AjaxReturnObject(0, e.Message();
}
}

Javascript

$.ajax({
  ...
  success: function (data) {
    if (data.AccountToken == 0) {
      // There was an error 
      log(data.Payload);
    }
    else {
      // your code
    }
  }
});

I offer this alternative because I'm not sure that if you throw an error in the server side code, that the function returns anything back. That error you're receiving, is client side, the error callback really refers to whether or not the request could be made.

Upvotes: 1

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