asp.net web表单json返回结果

[WebMethod]
    public String GetSomething()
    {
      // avoid circual reference(parent child)
      List<RetUsers> res = repo.GetAllUser().SELEct(c => new RetUsers {user_iD = c.user_iD,user_Name = c.user_Name,Date_Expire = c.Date_Expire }).ToList();
      String res1 = res.ToJson();
      // extension methods
      return res.ToJson();
    }

[
    {"user_iD":1,"user_Name":"Test 1","Date_Expire":null},{"user_iD":2,"user_Name":"Test 2","Date_Expire":null}
]

返回列表，并使用[ScriptMethod(ResponseFormat = ResponseFormat.Json)]属性 – 它将创建JSON对象作为自动返回：

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)] 
public List<RetUsers> GetSomething()
{
  // avoid circual reference(parent child)
  List<RetUsers> res = repo.GetAllUser().SELEct(c => new RetUsers {user_iD = c.user_iD,Date_Expire = c.Date_Expire }).ToList();

  return res;
}

在JS方面：

$.ajax(
{
    type: "POST",async: true,url: YourMethodUrl,data: {some data},contentType: "application/json; charset=utf-8",dataType: "json",success: function(msg)
    {
        var resultAsJson = msg.d // your return result is JS array
        // Now you can loop over the array to get each object
        for(var i in resultAsJson)
        {
            var user = resultAsJson[i]
            var user_name = user.user_Name
            // Here you append that value to your label
        }
    }
})