怎样把文件传到虚拟目录中

怎样把文件传到虚拟目录中
还有WebClient类怎么用啊
是不是要建一个from窗体啊
急急急 --------------------编程问答-------------------- 大家可以帮哈忙啊，举个例子，写下代码，怎么样把文件传到虚拟目录中  啊
谢谢了 --------------------编程问答-------------------- 直接用FileUpload控件就可以了啊
FileUpload1.SaveAs(Server.MapPath("虚拟路径")); --------------------编程问答--------------------   WebClient myWebClient = new WebClient();
     myWebClient.Credentials = CredentialCache.DefaultCredentials;

// 要上传的文件
       FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
      BinaryReader r = new BinaryReader(fs);
      byte[] postArray = r.ReadBytes((int)fs.Length);
      Stream postStream = myWebClient.OpenWrite(uriString, "PUT");
      if (postStream.CanWrite)
      {
           postStream.Write(postArray, 0, postArray.Length);
           label1.Text = fileName  "上传成功！";
      }
--------------------编程问答-------------------- ftpwebrequest上传文件
fileupload
string uriString = "";
WebClient myWebClient = new WebClient();
string postData = "";
myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded");
byte[] byteArray = Encoding.ASCII.GetBytes(postData);
byte[] responseArray = myWebClient.UploadData(uriString,"POST",byteArray);

WebClient myWebClient = new WebClient();
string fileName = @"";
byte[] responseArray = myWebClient.UploadFile(uriString,"POST",fileName);

补充：.NET技术 ,  C#