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从 WebMethod 返回时,我正在努力正确处理对象。条件(我之后的研究):

保存属性的简单类:

    public class memberLogin
    {
    public string Username {get; set;}
    public string Password {get; set;}
    }

序列化方法:

        public static string JsonSerializer<T>(T t)
        {
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            MemoryStream ms = new MemoryStream();
            ser.WriteObject(ms, t);
            string jsonString = Encoding.UTF8.GetString(ms.ToArray());
            ms.Close();
            return jsonString;
        }

(为清楚起见进行了简化)Webmethod

    [WebMethod(EnableSession = true)]
    public static string getCredentials()
        {
            memberLogin ml = new memberLogin();
            ml.Username = "user";
            ml.Password = "pass";
            string json = JsonHelper.JsonSerializer<memberLogin>(ml);
            return json;
        }
        return null;
    }

和 JavaScript

$("#element").live("click", function (e) { 

$.ajax({
    type: "POST",
    url: "Default.aspx/getCredentials",
    data: "{}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    async: false,
    cache: false,
    success: post_to_url
});
});
function post_to_url(params) {
method = "post";
path = "http://example";

var form = document.createElement("form");
form.setAttribute("method", method);
form.setAttribute("action", path);

for(var key in params) {
    if(params.hasOwnProperty(key)) {
        var hiddenField = document.createElement("input");
        hiddenField.setAttribute("type", "hidden");
        hiddenField.setAttribute("name", key);
        hiddenField.setAttribute("value", params[key]);

        form.appendChild(hiddenField);
     }
}
document.body.appendChild(form);
form.submit();
}

调试时,WebMethod 返回"{\"Password\":\"pass\",\"Username\":\"user\"}",所以它似乎是我想要的(键,值 par),\但它是如何序列化的。但是,当使用 ajax 检索时,我无法从中获取任何值。alert(params)object Object, 调用 params.Username 给undefined. 有什么我想念的吗?某种演员?我认为如果对象被序列化,那么就没有这样的需要。很抱歉发了很长的帖子,但我试图提供尽可能多的信息。

4

1 回答 1

4

您必须将 JSON 字符串解析为 JSON 对象。在 Javascript 中:

var user = JSON.parse(params.responseText);
var username = user.Username;
var password = user.Password;
于 2013-02-26T18:30:54.050 回答