从C＃返回ajax错误

Question

When one WebMethod it's called from ajax, if I return a simple string, the ajax code go to success method without errors, something like this:

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static string Hello()
{
    return "Hello World";
}

This is right, but, how is the correct way to make the WebMethod for return a error and this will be captured in ajax Error method instead of success method?

Thanks

Answer 1

Change your Response status Code :

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static string Hello()
{
    Response.StatusCode = 400 ; // Will be captured on ajax error method 
    return "Hello World";
}