解析jQuery.ajax错误响应消息

Question

I am posting data from one ASP.NET page to another via jQuery ajax call in a form of JSON.

I am simulating the situation, where is get an error on ajax call. I get a response message in case of an error and I need to assign this html to an element on the page.

Here is what I get in a message:

I have the msg javascript variable, that, when looked up via Chrome debugger shows me that it contains info I need in responseText .

How do I get the value of responseText to display on the page?

Answer 1

In JavaScript variable names are case sensitive. In your example, you were trying to access the responseText field on the msg object, but you had a capital 'R'. Try this instead:

msg['responseText']

Or in much better style:

msg.responseText

Answer 2

Since its an Object use the dot notation to access it like xhr.responseText

error: function(xhr, status, error) {

  var err = eval("(" + xhr.responseText + ")");

  alert(err.Message);

}

Answer 3

您可以在鼠标指针下方的代码中看到-仅使用“ r”，而不使用大写的“ R”：

msg['responseText']

Answer 4

<div id='error'></div>

假设您在msg出现错误

$('#error').html(msg.responseText)