FtpWebRequest.ServicePoint 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取用于连接 FTP 服务器的 ServicePoint 对象。
public:
property System::Net::ServicePoint ^ ServicePoint { System::Net::ServicePoint ^ get(); };public System.Net.ServicePoint ServicePoint { get; }member this.ServicePoint : System.Net.ServicePointPublic ReadOnly Property ServicePoint As ServicePoint属性值
可用于自定义连接行为的 ServicePoint 对象。
示例
下面的代码示例从请求中检索服务点，并将最大连接数设置为 1。
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;
}
注解
如果不存在 ServicePoint 对象，则为 FTP 服务器创建一个对象。 若要设置可为 FTP 服务器打开的最大连接数，请设置 ConnectionLimit 此属性返回的 ServicePoint 实例的 属性。
