使用JSON将数据传递到ASP.NET webservice

我已成功从JSON格式的ASP.Net webservice（使用不需要参数的服务方法）返回数据，但一直在努力进行需要参数的web服务调用。使用JSON将数据传递到ASP.NET webservice

的Webservice：

<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

的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"}

我明白错误，但似乎无法正确解决如何格式化我的请求。

来源

2010-06-22 Maxim Gershkovich

终于明白了......所以对于任何好奇的人来说，答案都是琐碎的。

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。

来源

2010-06-23 05:54:27

使用JSON将数据传递到ASP.NET webservice

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