Ajax GET requests to an ASP.NET Page Method?

A situation I ran across this week: we have a jQuery Ajax call that goes back to the server to get data

$.ajax(
{
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: fullMethodPath,
    data: data,
    dataType: "json",
    success: function(response) {
        successCallback(response);
    },
    error: errorCallback,
    complete: completeCallback
});

fullMethodPath is a link to a static method on a page (let’s say /MyPage.aspx/MyMethod).

public partial class MyPage : Page
{
    // snip

    [WebMethod]
    public static AjaxData MyMethod(string param1, int param2)
    {
        // return some data here
    }
}

This works, no problem.

A colleague had attempted to replace this call with one where type was “GET”. It broke, I had to fix it. Eventually, I went back to POST because we needed the fix quick, but it has been bugging me because semantically a GET is more “correct” in this case.

As I understand it, jQuery translates an object in data to a Query String: /MyPage.aspx/MyMethod?param1=value1&param2=value2 but all I could get back was the content of the page MyPage.aspx.

Is that just a “feature” of Page methods, or is there a way of making a GET request work?

Answers:

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Method 1

For security reasons, ASP.Net AJAX page methods only support POST requests.

Method 2

It is true that ASP.NET AJAX page methods only support POST requests for security reasons but you can override this behavior by decorating your WebMethod with this these both attribute:

[WebMethod]
[ScriptMethod(UseHttpGet = true)]

I felt that the accepted answer was incomplete without pointing out a work around.

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