Question

我已经成功地从JSON格式的ASP.Net webservice返回数据（使用不需要参数的服务方法），但是在进行需要参数的webservice调用时却很困难。

web服务：

<WebMethod()> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json, UseHttpGet:=True)> _
Public Function TestWebService(ByVal Description As String) As Stock
    Dim res As New Stock(Guid.NewGuid, Description)
    Return res
End Function

对象：

Public Class Stock

    Public Sub New()
    End Sub

    Public Sub New(ByVal StockID As Guid, ByVal Description As String)
        Me._StockID = StockID
        Me._Description = Description
    End Sub


    Public Property StockID As Guid
    Public Property Description As String

End Class

使用Javascript：

client = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
client.onreadystatechange = DataReturnedFromHttpRequest;
client.open("GET", "/MyWebService.asmx/TestWebService?" + JSON.stringify({"Description":["Test"]}), true); 
client.setRequestHeader("Content-Type", "application/json");
client.send(null);

响应：

{"Message":"Invalid web service call, missing value for parameter: \u0027Description\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"}

我理解错误，但似乎无法确定如何正确格式化我的请求。

Answer 1

终于明白了...所以对于任何好奇的人来说，答案都是微不足道的。

get请求必须采用以下格式

/MyWebService.asmx/MyWebserviceMethod?Param1=%22ParamValue1%22&Param2=%22ParamValue2

然后它就像一个魅力。

使用JSON将数据传递到ASP.NET Webservice

1 个答案: