FtpWebRequest.ServicePoint 屬性
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得用來連接到 FTP 伺服器的 ServicePoint 物件。
public:
property System::Net::ServicePoint ^ ServicePoint { System::Net::ServicePoint ^ get(); };C#
public System.Net.ServicePoint ServicePoint { get; }member this.ServicePoint : System.Net.ServicePointPublic ReadOnly Property ServicePoint As ServicePoint可以用來自訂連接行為的 ServicePoint 物件。
下列程式代碼範例會從要求擷取服務點，並將連線數目上限設定為一。
static bool ListFilesOnServer( Uri^ serverUri )
{
// The serverUri should start with the ftp:// scheme.
if ( serverUri->Scheme != Uri::UriSchemeFtp )
{
return false;
}
// Get the object used to communicate with the server.
FtpWebRequest^ request = dynamic_cast<FtpWebRequest^>(WebRequest::Create( serverUri ));
request->Method = WebRequestMethods::Ftp::ListDirectory;
// Get the ServicePoint object used for this request, and limit it to one connection.
// In a real-world application you might use the default number of connections (2),
// or select a value that works best for your application.
ServicePoint^ sp = request->ServicePoint;
Console::WriteLine( "ServicePoint connections = {0}.", sp->ConnectionLimit );
sp->ConnectionLimit = 1;
FtpWebResponse^ response = dynamic_cast<FtpWebResponse^>(request->GetResponse());
// The following streams are used to read the data returned from the server.
Stream^ responseStream = nullptr;
StreamReader^ readStream = nullptr;
try
{
responseStream = response->GetResponseStream();
readStream = gcnew StreamReader( responseStream,System::Text::Encoding::UTF8 );
if ( readStream != nullptr )
{
// Display the data received from the server.
Console::WriteLine( readStream->ReadToEnd() );
}
Console::WriteLine( "List status: {0}", response->StatusDescription );
}
finally
{
if ( readStream != nullptr )
{
readStream->Close();
}
if ( response != nullptr )
{
response->Close();
}
}
return true;
}
C#
public static bool ListFilesOnServer(Uri serverUri)
{
// The serverUri should start with the ftp:// scheme.
if (serverUri.Scheme != Uri.UriSchemeFtp)
{
return false;
}
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
request.Method = WebRequestMethods.Ftp.ListDirectory;
// Get the ServicePoint object used for this request, and limit it to one connection.
// In a real-world application you might use the default number of connections (2),
// or select a value that works best for your application.
ServicePoint sp = request.ServicePoint;
Console.WriteLine("ServicePoint connections = {0}.", sp.ConnectionLimit);
sp.ConnectionLimit = 1;
FtpWebResponse response = (FtpWebResponse) request.GetResponse();
// The following streams are used to read the data returned from the server.
Stream responseStream = null;
StreamReader readStream = null;
try
{
responseStream = response.GetResponseStream();
readStream = new StreamReader(responseStream, System.Text.Encoding.UTF8);
if (readStream != null)
{
// Display the data received from the server.
Console.WriteLine(readStream.ReadToEnd());
}
Console.WriteLine("List status: {0}",response.StatusDescription);
}
finally
{
if (readStream != null)
{
readStream.Close();
}
if (response != null)
{
response.Close();
}
}
return true;
}
ServicePoint如果沒有物件存在，則會為 FTP 伺服器建立一個物件。 若要設定 FTP 伺服器可開啟的連線數目上限，請設定 ConnectionLimit 這個屬性所傳回之實例的 ServicePoint 屬性。
| 產品 | 版本 |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
