当method有参数时,Ajax回调失败

Question

我有以下javascript:

<script type="text/javascript">
    $(document).ready(function() {
        $.ajax({
            type: "POST",
            url: "WebForm3.aspx/sayHello",
            contentType: "application/json; charset=utf-8",
            data: "{}",
            dataType: "json",
            success: AjaxSucceeded,
            error: AjaxFailed
        }); 
    });
    function AjaxSucceeded(result) {
        alert(result.d);
    }
    function AjaxFailed(result) {
        alert(result.status + ' ' + result.statusText);
    }  
</script>  

我的代码背后有以下内容.

[WebMethod]
public static string sayHello() 
{
    return "hello";
}

这工作并显示你好.

现在,如果我这样做:

[WebMethod]
public static string sayHello(string args) 
{
    return "hello";
}

然后我得到内部服务器错误500作为回复.

如何更改此设置以允许我将实际数据发送到服务器端？

Answer 1

data: {
    args: "hello world"
},

此外,同时删除contentType并dataType为好.
另外,请添加traditional: true.您的结果请求将是:

$.ajax({
    type: "POST",
    url: "WebForm3.aspx/sayHello",
    traditional: true,
    data: {
        args: "hello world"
    },
    success: AjaxSucceeded,
    error: AjaxFailed
});