WebMethod无法捕获通过ajax发送的对象

本文关键字:ajax 对象 WebMethod | 更新日期: 2023-09-27 18:00:41

我一直在尝试用JavaScript从客户端获取一个对象,并将其发送到C#WebMethod进行处理。到目前为止,我还无法获得WebMethod来成功处理传入的json对象。

我的JavaScript:

var _Messages;
function callData() {
    var timeNow = new Date;
    $.ajax({
        type: "POST",
        url: "Default.aspx/All",
        data: '{}',
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {_Messages = data.d; Render(data.d); $('#updated_time').html("<p class='text'>Last Updated: " + ("0" + timeNow.getHours()).slice(-2) + ":" + ("0" + timeNow.getMinutes()).slice(-2) + ":" + ("0" + timeNow.getSeconds()).slice(-2) + "</p>") },
        failure: function (response) {
            alert(response.d);
        }
    });
}
function printFunction() {
    var listofmsg = $.grep(_Messages, function(a) {
        return a.Text.trim().replace(/'r'n|'r|'n/g, ' ') == $('#navigate tr td').eq(active*2-1).text().trim().replace(/'r'n|'r|'n/g, ' ');
    });
    listofmsg[0].Text = listofmsg[0].Text.replace(/'r'n|'r|'n/g, ' ');
    var msg = listofmsg[0];
    //var input = {TimeStamp: msg.Text, TimeSet: msg.TimeSet, Text: msg.Text, Type: msg.Type, IsGreen: msg.IsGreen}    
    console.log(JSON.stringify({'message':msg}));
    $.ajax({
        type: "POST",
        url: "Default.aspx/PrintMessage",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        data: JSON.stringify({ 'message' : msg}),
        success: function (data) { console.log(data.d);},
        failure: function (response) {
            alert(response.d);
        }
    });
}

我的目标:

public class Message
    {
        public string TimeStamp { get; set; }
        public DateTime TimeSet { get; set; }
        public string Text { get; set; }
        public string Type { get; set; }
        public bool IsGreen { get; set; }
        public Message(string timestamp, DateTime timeset, string text, string type, bool isgreen)
        {
            TimeStamp = timestamp;
            TimeSet = timeset;
            Text = text;
            Type = type;
            IsGreen = isgreen;
        }
    }

我的网络方法:

[WebMethod]
        public static bool PrintMessage(Message message)
        {
            try
            {
             ...
             return true
            }
            catch (Exception ex)
            {
             ...
             return false
            }
         }

我的错误是,当我到达WebMethod时,消息对象为null。尽管它在客户端是这样填写的:

{"message":[{"TimeStamp":"08:39:28","TimeSet":"/Date(1398727057151)/","Text":"TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST ","Type":"spc","IsGreen":true}]} 

有什么问题吗?我的最佳猜测是我没有正确格式化json对象,

WebMethod无法捕获通过ajax发送的对象

Linting您提供的JSON对象(使用http://jsonlint.com/)并且它看起来好像"message"是一个数组/集合,因此取消序列化将有点困难。您应该将方法中的类型更改为:

public static bool PrintMessage(List<Message> message)

或者删除JSON对象声明中的数组声明([]括号)并保留相同的签名,即

public static bool PrintMessage(Message message)

JSON对象修改为:

{ "message": { "TimeStamp": "08:39:28", "TimeSet": "/Date(1398727057151)/", "Text": "TEST TEST TEST TEST TEST", "Type": "spc", "IsGreen": true } }

我想知道是否真的需要属性"消息"。

调整您的ajax帖子以使用

$.ajax({
    type: "POST",
    url: "/PrintMessage",
    contentType: "application/json",
    data: JSON.stringify({ 'message' : msg}),
    success: function (data) { console.log(data.d);},
    failure: function (response) {
        alert(response.d);
    }
});