FtpWebResponse.Close 方法

定義

命名空間:

System.Net

組件:

netstandard.dll, System.Net.Requests.dll

來源:

FtpWebResponse.cs

釋放了回應所持有的資源。

public:
 override void Close();

public override void Close();

override this.Close : unit -> unit

Public Overrides Sub Close ()

範例

以下程式碼範例是從伺服器下載資料，讀取回應串流的資料，然後關閉它。

public static bool DownloadFileFromServer(Uri serverUri, string localFileName)
{
    // The serverUri parameter should start with the ftp:// scheme.
    if (serverUri.Scheme != Uri.UriSchemeFtp)
    {
        return false;
    }
    // Get the object used to communicate with the server.
    // Note that the cast to FtpWebRequest is done only
    // for the purposes of illustration. If your application
    // does not set any properties other than those defined in the
    // System.Net.WebRequest class, you can use the following line instead:
    // WebRequest request = WebRequest.Create(serverUri);
    //
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
    request.Method = WebRequestMethods.Ftp.DownloadFile;

    FtpWebResponse response = (FtpWebResponse) request.GetResponse();

    Stream responseStream = null;
    StreamReader readStream = null;
    StreamWriter writeStream = null;
    try
    {
        responseStream = response.GetResponseStream();
        readStream = new StreamReader(responseStream, System.Text.Encoding.UTF8);
        // Display information about the data received from the server.
        Console.WriteLine("Bytes received: {0}",response.ContentLength);

        Console.WriteLine("Message from server: {0}", response.StatusDescription);
        Console.WriteLine("Resource: {0}", response.ResponseUri);

        // Write the bytes received from the server to the local file.
        if (readStream != null)
        {
            writeStream = new StreamWriter(localFileName, false);
            writeStream.Write(readStream.ReadToEnd());
        }
    }
    finally
    {
        if (readStream != null)
        {
            readStream.Close();
        }
        if (response != null)
        {
            response.Close();
        }
        if (writeStream != null)
        {
            writeStream.Close();
        }
    }
    return true;
}

備註

Close若該方法回傳的資料流為 false，則KeepAlive該方法會關閉該方法回傳GetResponseStream的資料流。 在關閉過程中，資料可能會傳送到控制連線上的伺服器。

備註

當您在應用程式中啟用網路追蹤時，此成員會輸出追蹤資訊。 欲了解更多資訊，請參閱 .NET Framework 中的網路追蹤。

另請參閱

• FtpWebRequest
• FtpStatusCode
• WebRequestMethods.Ftp
• WebRequest
• WebResponse
• WebClient