Question

I am calling a server side function to return a json format string and parse in client side using javascript and ajax. I got parse error at javascript. I think it is the backslash JavaScriptSerializer adds to serialize object. here is the response I see from firebug: {"d":"{"Item":"Testing"}"} , i understand the backslash is to escape the double quote but how do i get json to fix this problem?? i spend 3 days and do all the search at google. It seems i am doing the same way as others. Thanks for help.

服务器侧边代码 :

[System.Web.Services.WebMethod]
public static string testmethod(string serial)
{ 
    ItemList itemlist = new ItemList();
    itemlist.Item = "Testing";     
    return new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(itemlist);
}

[System.Runtime.Serialization.DataContract]
public class ItemList
{
    [System.Runtime.Serialization.DataMember]
    public string Item { get; set; }
}

侧面 Javascript 客户端, 带有 ajax :

function PassParemeterToAspxUsingJquery(serial)
{               
    var sn = "test";//serial;
    $.ajax({
    type: "POST",
    url: "test.aspx/testmethod",
    contentType: "application/json; charset=utf-8",
    data: "{serial: " + sn+" }" ,
    dataType: "json",
    success: function(msg) {           
       alert(msg.d);             
    },
    error: function(jqXHR, textStatus, errorThrown){
       alert("The following error occured: "+ textStatus, errorThrown);
       alert(jqXHR.responseText);
    }
    });
}

Answer 1

WebMethod 将组合值作为 JSON 文本的一部分。如果您想要它作为 JSON 对象而不是 JSON 字符串序列, 您必须返回一个 < code> Object , 而不是一个 < code> String :

[System.Web.Services.WebMethod]
public static object testmethod(string serial)
{
    ItemList itemlist = new ItemList();
    itemlist.Item = "Testing";
    return itemList;
}

虽然这可能需要.NET3.5和ScriptMethodAttribitte :

[System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public static object testmethod(string serial)
{ ... }

然后就说:

success: function(msg) {
   alert(msg.d.Item);
}

或者,您应该能够与它合作,例如通过剖析 msg.d :

success: function(msg) {
    var data = $.parseJSON(msg.d);

    alert(data.Item);
}

友情链接