$ .ajax和webmethod/pagemethods [英] $.ajax and webmethod/pagemethods

问题描述

我正在尝试调用一种没有任何参数的页面方法，而且我似乎无法使其正常工作.

I'm trying to call a pagemethod that doesn't have any parameters, and I can't seem to get it working.

如果我在pagemethod中只有一个参数，则可以正常工作.

If I have a single parameter in the pagemethod it works fine.

$.ajax({
  type: "POST",
  url: "Default.aspx/getLastCallData",
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function(msg) {
    alert(msg.d);
  },
  error: function(XMLHttpRequest, textStatus, errorThrown) {
    alert('Couldnt get call data');
  }
});

任何想法.

推荐答案

由于未传递任何数据，因此仍应添加data参数并传递一个空的JSON对象.

Since you are not passing any data, you should still add the data parameter and pass an empty JSON object.

通过发送一个空的JSON对象，jQuery将正确发送您在$ .ajax调用中定义的contentType.这是jQuery的一个奇怪的怪癖，实际上并没有得到解释.

By sending an empty JSON object, jQuery will correctly send the contentType you defined in the $.ajax call. This is a weird quirk that jQuery has that hasn't really been explained.

添加以下参数:

data: "{}"

因此您的通话应如下所示:

So your call should look like:

$.ajax({
  type: "POST",
  url: "Default.aspx/getLastCallData",
  data: "{}",
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function(msg) {
    alert(msg.d);
  },
  error: function(XMLHttpRequest, textStatus, errorThrown) {
    alert('Couldnt get call data');
  }
});

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