Question

VS2010，C＃,. NET 4

我创建了2个应用程序：Web服务和Windows窗体应用程序（两者都在同一台PC上运行）。这是代码：

WEBSERVICE：

public class Service1 : System.Web.Services.WebService
{

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

WINDOWS APPLICATION：

HttpWebRequest req =(HttpWebRequest)WebRequest.Create("http://localhost:20848/Service1.asmx/HelloWorld");

req.Credentials = CredentialCache.DefaultCredentials;
req.Method = "POST";                
//Set the content type of the data being posted.
req.ContentType = "application/text";

WebResponse res = req.GetResponse();

StreamReader sr = new StreamReader(res.GetResponseStream());
string txtOutput = sr.ReadToEnd();
Console.WriteLine(sr.ReadToEnd());

这项工作非常精细。我从包含消息的webservice获得响应。现在我将应用程序2的应用程序更改为：

WEB服务：

public class Service1 : System.Web.Services.WebService
{

    [WebMethod]
    public string HelloWorld(string message)
    {
        return message;
    }
}

WINDOWS FORMS APPLICATION：

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:20848/Service1.asmx/HelloWorld");

req.Credentials = CredentialCache.DefaultCredentials;
req.Method = "POST";
string inputData = "sample webservice";
string postData = "message=" + inputData;

byte[] byte1 = System.Text.ASCIIEncoding.ASCII.GetBytes(postData);
req.ContentLength = byte1.Length;
Stream postdataStream = req.GetRequestStream();

//Set the content type of the data being posted.
req.ContentType = "application/text";

postdataStream.Write(byte1, 0, byte1.Length);

WebResponse res = req.GetResponse();

StreamReader sr = new StreamReader(res.GetResponseStream());
string txtOutput = sr.ReadToEnd();
Console.WriteLine(sr.ReadToEnd());

此失败在req.GetResponse（）; “它说基础连接已经关闭”。谁能告诉我这里的代码有什么问题。注意 - 我必须只使用WebRequests访问WebMethods。我不想添加Web引用。

Answer 1

我注意到在调用GetResponse（）之前不要关闭请求流。我没有测试过，但docs中的示例关闭了请求流。无论哪种方式，这都是很好的做法，所以先尝试一下。

即

postdataStream.Write(byte1, 0, byte1.Length);
postDataStream.Close();
WebResponse res = req.GetResponse();

WebRequest和WebMethods互操作

1 个答案: