为什么Web Service无法返回正确的JSON?

时间:2014-03-07 12:58:59

标签: c# jquery json web-services

asmx页面,我调用Web服务,它返回一个JSON字符串,但我的jQuery帖子失败了,我不确定为什么?

                    $.post("/DesktopModules/EastlinkMilestones/MilestonesService.asmx /InsertYear_Decade",
                {   Year: $('#txtYear_Decade').val(),
                    IsDecade: $('#chkIsDecade').prop('checked')
                },
                function (data)
                {
                    Current_Edit_State == EDIT_STATE.UPDATE;
                    successMessage.text('Year/Decade created successfully.');
                    informationMessage.css('display', 'none');
                    successMessage.css('display', 'block');                        
                },
                "json"
                )
                 .done(function(data) {
                    alert( "second success" );
                    alert( JSON.stringify(data));
                    })
                 .fail(function(jqXHR, textStatus, errorThrown) {                     
                     alert( "error" );
                     alert( JSON.stringify(jqXHR));
                     alert(textStatus);
                     alert(errorThrown);
                    })
                 .always(function() {
                    alert( "finished" );
                 });

.ASMX方法

[WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public string InsertYear_Decade()
    { var Request = HttpContext.Current.Request;
        var Response = HttpContext.Current.Response;

                    var js = new JavaScriptSerializer();

                string mileStoneData = js.Serialize(data);

                return mileStoneData; // {"ID": 20, "Year": "2013", "IsDecade": false }
            }
    }

Web方法总是失败,它的textStatus = parsererror和errorThrown =无效字符?

2 个答案:

答案 0 :(得分:1)

您需要不返回值,只需写入响应即可。尝试这样的事情:

JavaScriptSerializer serializer = new JavaScriptSerializer();
Response.ContentType = "application/json";
Response.Write(serializer.Serialize(data));

答案 1 :(得分:-1)

您应该直接返回对象,而不是返回类型字符串。无需使用JavascriptSerializer,并在您的jquery帖子中将您的contentType设置为 application / json