jQuery AJAX不断调用ASP.NET WebMethod错误

Question

I have a really simple AJAX method inside my Default.aspx.cs and it looks like this: 我的Default.aspx.cs中有一个非常简单的AJAX方法，它看起来像这样：

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    [WebMethod]
    public static string GetDate()
    {
        return DateTime.Now.ToString();
    }
}

And the Default.aspx looks like this: 而Default.aspx看起来像这样：

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
    <script type="text/javascript" src="http://192.168.1.2/tizma.com/js/jquery-1.3.2.min.js"></script>
    <script type="text/javascript">   
        $(document).ready(function() {
          // Add the page method call as an onclick handler for the div.
          $("#Result").click(function() {
            $.ajax({
              type: "POST",
              url: "Default.aspx/GetDate",
              data: "{}",
              contentType: "application/json; charset=utf-8",
              dataType: "json",
              success: AjaxSucceeded,
              error: AjaxFailed
            });
          });
        });

        function AjaxSucceeded(result)
        {
            alert(result.d);
        }

        function AjaxFailed(result)
        {
            alert(result.status + " " + result.statusText);
        }
    </script>
</head>
<body>
    <div id="Result">Click me</div>
</body>
</html>

The problem is when I click the div the ajax error function is all that is ever called with a 200 status. 问题是，当我单击div时，ajax错误函数就是状态为200的所有函数。

What am I doing wrong? 我究竟做错了什么？

Answer 1

Not sure if it's causing the problem but you have a line which reads: 不知道这是否是导致问题的原因，但是您有一行显示：

data: "{}",

it should read: 它应显示为：

data: {},

or you can omit the line altogether as it's an optional parameter to the method call. 或者您可以完全省略该行，因为它是方法调用的可选参数。 You are currently setting it to a string value when it actually expects parameters for the webmethod which might cause problems. 当前，当您实际上希望使用webmethod的参数（可能会导致问题）时，将其设置为字符串值。

Also, the lines reading: 另外，这些行显示为：

contentType: "application/json; charset=utf-8",
dataType: "json",

seem unnecessary to me because for starters, it isn't obvious that your webmethod is actually returning json. 对我来说似乎不必要，因为对于初学者来说，您的web方法实际上并不返回json并不明显。 I think it's just returning a string. 我认为这只是返回一个字符串。 Try removing those three lines alltogether and see if it doesn't just start working. 尝试一起删除这三行，看看它是否还不开始工作。

jQuery AJAX不断调用ASP.NET WebMethod错误

问题描述

1 个解决方案

解决方案1
-2 2009-08-30 09:31:16

jQuery AJAX不断调用ASP.NET WebMethod错误

问题描述

1 个解决方案

解决方案1 -2 2009-08-30 09:31:16

解决方案1
-2 2009-08-30 09:31:16