使用Jquery调用.Net webservice在尝试发布数据时会造成祸患

Question

当数据键没有要发送的数据时,以下代码正确执行,即数据:"{}"空JSON对象,而webservice不带参数.我想将一些数据发布到网络服务,但我遇到了麻烦.

当我尝试将其设置为数据时:"{'name':'Niall','surname':'Smith'}",我收到错误

{"Message":"Invalid web service call, missing value for parameter: \u0027json\u0027.","StackTrace":"   at System.Web.Script.Services.WebServiceMethodData.CallMethod(Object target, IDictionary`2 parameters)\r\n   at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)\r\n   at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)\r\n   at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.InvalidOperationException"}

Web服务未执行.

这是我的Jquery调用,将我的数据发布回服务器.

    $.ajax({
        type: "POST",
        url: "/WebServices/BasketServices.asmx/AddItemToBasket",
        data: "{'name':'niall'}", // Is this Correct??
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: OnItemAddedSuccess
    });
function OnItemAddedSuccess(result,eventArgs) {
    //deserialize the JSON and use it to update the Mini Basket
    var response = JSON.parse(result.d);
}

这是我的WebService

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
[System.Web.Script.Services.ScriptService]
public class BasketServices : System.Web.Services.WebService
{
    [WebMethod(true)]
    public string AddItemToBasket(string json)
    {
       //do stuff
       return myString.toJSON();
    }
}

问题是什么？是要发布的JSON数据的格式吗？可能是我没有在我的WebService上设置正确的属性.Dave Ward的帖子中提到的问题怎么样？

我已经尝试了我能想到的一切.有没有人有任何想法？

Answer 1

我认为webservice期望设置参数json.试试这个AJAX调用:

var data = {'name':'niall'};

$.ajax({
    type: "POST",
    url: "/WebServices/BasketServices.asmx/AddItemToBasket",
    data: "json=" + JSON.stringify(data),
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: OnItemAddedSuccess
});

哪种JSON.stringify()方法类似于"官方"实现中的方法:http://json.org/js.html

Answer 2

上面的解决方案对我不起作用.所以相反,我做了以下.1.)确保javascript对象属性(此处为ID和Quantity)具有相同的名称和相同的类型(在本例中为number == int)作为webservice的参数2.)不要将对象包装到一个数据传输对象(DTO),但只是字符串化他们感谢Yasin Tarim给了我需要的提示让它工作

// javascript object
var cartItem = {"ID": 123, "Quantity": 2}

$.ajax({
    type: "POST",
    url: "/WebServices/BasketServices.asmx/AddItemToBasket",
    data: JSON.stringify(cartItem),
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (data) { OnSuccess(cartItem, data); },
});

    // ASMX Server Side Code
    [WebMethod(Description = "Add item to ShoppingCart")]
    [ScriptMethod(UseHttpGet = false, ResponseFormat = ResponseFormat.Json)]        
    public string AddItemToBasket(int ID, int Quantity) 
    {            
        CartItem cI = new CartItem();
        cI.iD = ID;
        cI.qty = Quantity;
        CartItem.SaveToDatabase(ci);
        return "foo from Webservice - it worked";
    }