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我有一个简单的 ASP.NET Web 服务：

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Web.Script.Services;
using System.Web.Script.Serialization;
using System.Web.UI.WebControls;
using System.Web.UI;

namespace WebService1
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    [ScriptService]
    public class Service1 : System.Web.Services.WebService
    {
        [WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public string Get()
        {
            member mem = new member();
            mem.hello = "hello hello hello";
            mem.kalon = "fafasdf";
            mem.name = "wfasdfawe";
            return new JavaScriptSerializer().Serialize(mem);
        }

        [WebMethod]
        public string HelloWorld()
        {
            return "Hello World";
        }
    }

    public class member
    {
        public string hello { get; set; }
        public string name { get; set; }
        public string kalon { get; set; }
    }
}

我在使用 WebClient 从 SilverLight 检索字符串时遇到问题。你能启发我吗？我使用下面的代码从 WebService 获取字符串。

WebClient wc = new WebClient();

public MainPage()
{
    InitializeComponent();
    wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);
}

private void button1_Click(object sender, RoutedEventArgs e)
{
    Uri uri = new Uri("http://www.MyWeb.com/Service1.axms/Get");
    wc.DownloadStringAsync(uri);
}

void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
    MessageBox.Show(e.Error.ToString());
    MessageBox.Show(e.Result);
}

我收到错误：

System.Security.SecurityException ---> System.Security.SecurityException：安全错误。在 System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) 在 System.Net.Browser.BrowserHttpWebRequest.<>c_ DisplayClass5.b _4(Object sendState) 在 System.Net.Browser.AsyncHelper.<>c_ DisplayClass4.b _1 (Object sendState) --- 内部异常堆栈跟踪结束 --- 在 System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 在 System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) 在 System. System.Net.WebClient.DownloadBitsResponseCallback（IAsyncResult 结果）处的 Net.WebClient.GetWebResponse（WebRequest 请求，IAsyncResult 结果）

我也试过了，还是一样的错误：

Uri uri = new Uri("http://www.MyWeb.com/Service1.axms?op=Get");
wc.DownloadStringAsync(uri);

还有 1 个问题：这样的 url 是否正确获取字符串？

http://www.MyWeb.com/Service1.axms?op=Get

http://www.MyWeb.com/Service1.axms/Get
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