如何將帶有$ ajax的JSON參數傳遞給asmx Web服務

Question

我的參數如下：

var pMaster = '{"tid" : "474", "fid":"2"}';
var pDetail = '[{"recid":5618,"tid":"474","itemid":"1435","nar1":""},{"recid":5619,"tid":"474","itemid":"1203","nar1":""},{"recid":5620,"tid":"474","itemid":"1205","nar1":""}]';
var e = '{PurcMast: ' + pMaster  + ', PurDetail: ' + pDetail + '}';

我打電話給ajax如下

$.ajax({
        type: "POST",
        url: "WebService.asmx/saveValue",
        data: e,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (result) {
            alert(result.d);
        },
        error: function (jqXHR) { alert(jqXHR.responseText); }
    });

和WebService.asmx代碼如下：

[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
[WebMethod]    
public void saveValue(string PurcMast, string PurDetail)
{
    System.Data.DataTable purMaster = Common.CommonFunction.convertJSON2Table(Purchase);
    System.Data.DataTable purDetail = Common.CommonFunction.convertJSON2Table(PurchaseDetail);
}

我收到如下錯誤：

未捕獲的錯誤。{“消息”：“沒有為\\ u0027System.String \\ u0027的類型定義無參數構造函數。”，“StackTrace”：“在System.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject（IDictionary 2 dictionary, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary 2 rawParams）中的2 dictionary, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\& convertedObject)\\r\\n at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary \\ r \\ n在System.Web.Script.Script.WebServiceMethodData.CallMethodFromRawParams（對象目標，IDictionary 2 parameters)\\r\\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary 2 parameters)\\r\\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary 2 rawParams）\\ r \\ n在System.Web.Script.Services.RestHandler.ExecuteWebServiceCall（HttpContext context，WebServiceMethodData methodData）“，”ExceptionType“：”System.MissingMethodException“}

伙計們請幫助我，我不明白我在做什么錯。

Answer 1

我在我的網站上這樣做。 這就是我必須要做的......

// remove the outer quotes so they are json objects then json encode.
var pMaster = JSON.stringify({"tid" : "474", "fid":"2"});
var pDetail = JSON.stringify(
    {"[{"recid":5618,"tid":"474","itemid":"1435","nar1":""}, 
    {"recid":5619,"tid":"474","itemid":"1203","nar1":""},
    {"recid":5620,"tid":"474","itemid":"1205","nar1":""}]);
// then create e by stringify a second time

var e = JSON.stringify({PurcMast: pMaster , PurDetail: pDetail });

這對我有用。 您只是創建字符串而不是序列化的json對象。

Answer 2

我猜你是以錯誤的方式傳遞數據。 嘗試這個：

var pMaster = '{"tid" : "474", "fid":"2"}';
var pDetail = '[{"recid":5618,"tid":"474","itemid":"1435","nar1":""},{"recid":5619,"tid":"474","itemid":"1203","nar1":""},{"recid":5620,"tid":"474","itemid":"1205","nar1":""}]';

$.ajax({
        type: "POST",
        url: "WebService.asmx/saveValue",
        data: {PurcMast: pMaster, PurDetail: pDetail },
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (result) {
            alert(result.d);
        },
        error: function (jqXHR) { alert(jqXHR.responseText); }
    });

Answer 3

您的URL是url: "WebService.asmx/saveValue"而方法名稱是savePurchase

$.ajax({
        type: "POST",
        url: "WebService.asmx/savePurchase",
        data: e,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (result) {
            alert(result.d);
        },
        error: function (jqXHR) { alert(jqXHR.responseText); }
    });

我認為這應該有效。