ServicePoint.ConnectionLeaseTimeout 屬性

定義

取得或設定作用中 ServicePoint 連接關閉前的毫秒數。

public:
 property int ConnectionLeaseTimeout { int get(); void set(int value); };
public int ConnectionLeaseTimeout { get; set; }
member this.ConnectionLeaseTimeout : int with get, set
Public Property ConnectionLeaseTimeout As Integer

屬性值

Int32

Int32,指定作用中 ServicePoint 連接維持開啟的毫秒數。 預設值為 -1,這允許作用中 ServicePoint 連接無限期保持連接。 將這個屬性設為 0,可以強制 ServicePoint 連接在服務要求之後關閉。

例外狀況

為設定作業指定的值是小於 -1 的負數。

範例

下列程式碼範例會設定這個屬性的值。

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::Net::Sockets;
using namespace System::IO;
using namespace System::Threading;

namespace SystemNetExamples
{
    public ref class ServicePointExample
    {
    public:

        // Pass in the name of the Web page to retrieve.    
        static void PrintResponse(String^ page)
        {

            // Create the request.
            HttpWebRequest^ request;
            Uri^ uri;
            
 

            try
            {
                uri = gcnew Uri(page);
            }
            catch (UriFormatException^ ex) 
            {
                Console::WriteLine(ex->Message);
            }

            request = (HttpWebRequest^) WebRequest::Create(uri); 

            // Get the service point that handles the request's 
            // socket connection.
            ServicePoint^ point = request->ServicePoint;

            // Set the receive buffer size on the underlying socket.
            point->ReceiveBufferSize = 2048;

            // Set the connection lease timeout to infinite.
            point->ConnectionLeaseTimeout = Timeout::Infinite;

            // Send the request.
            HttpWebResponse^ response = 
                (HttpWebResponse^) request->GetResponse();
            Stream^ responseStream = response->GetResponseStream();
            StreamReader^ streamReader = 
                gcnew StreamReader(responseStream);
            try
            {
                // Display the response.
                Console::WriteLine(streamReader->ReadToEnd());
                responseStream->Close();
                response->Close();
            }
            finally
            {
                streamReader->Close();
            }
        }
    };
}
using System;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;

namespace Examples.System.Net
{
    public class ServicePointExample
    {
        // Pass in the name of the Web page to retrieve.
        public static void Main(string[] args)
        {
            string page;
            if (args == null || args.Length == 0 || args[0].Length == 0)
            {
                page = "http://www.contoso.com/default.html";
            }
            else
            {
                page = args[0];
            }
            // Create the request.
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(page);
            // Get the service point that handles the request's socket connection.
            ServicePoint point = request.ServicePoint;
            // Set the receive buffer size on the underlying socket.
            point.ReceiveBufferSize = 2048;
            // Set the connection lease timeout to infinite.
            point.ConnectionLeaseTimeout = Timeout.Infinite;
            // Send the request.
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream responseStream = response.GetResponseStream();
            StreamReader s = new StreamReader(responseStream);
            // Display the response.
            Console.WriteLine(s.ReadToEnd());
            s.Close();
            responseStream.Close();
            response.Close();
        }
    }
}
Imports System.Net
Imports System.Net.Sockets
Imports System.IO
Imports System.Threading

Public Class ServicePointExample

    ' Pass in the name of the Web page to retrieve.
    Public Shared Sub Main(ByVal args() As String)
        Dim page As String
        If args Is Nothing OrElse args.Length = 0 OrElse args(0).Length = 0 Then
            page = "http://www.contoso.com/default.html"
        Else
            page = args(0)
        End If

        Dim request As HttpWebRequest = CType(WebRequest.Create(page), HttpWebRequest)
        ' Get the service point that handles the request's socket connection.
        Dim point As ServicePoint = request.ServicePoint
        ' Set the receive buffer size on the underlying socket.
        point.ReceiveBufferSize = 2048
        ' Set the connection lease timeout to infinite.
        point.ConnectionLeaseTimeout = Timeout.Infinite
        ' Send the request.
        Dim response As HttpWebResponse = CType(request.GetResponse(), HttpWebResponse)
        Dim responseStream As Stream = response.GetResponseStream()
        Dim s As New StreamReader(responseStream)
        ' Display the response.
        Console.WriteLine(s.ReadToEnd())
        responseStream.Close()
        response.Close()
    End Sub
End Class

備註

您可以使用這個屬性來確保 ServicePoint 物件的使用中連接不會無限期保持開啟。 此屬性適用于應該定期卸載和重新建立連線的案例,例如負載平衡案例。

根據預設,當 為 true 要求時 KeepAliveMaxIdleTime 屬性會設定因為閒置而關閉 ServicePoint 連線的逾時。 如果 具有作用中的 ServicePoint 連線,則沒有任何作用, MaxIdleTime 且連線會無限期保持開啟。

ConnectionLeaseTimeout當 屬性設定為 -1 以外的值,並在指定的時間經過之後,在服務要求之後關閉作用 ServicePoint 中的連線,方法是在該要求中設定 KeepAlivefalse

設定此值會影響物件所 ServicePoint 管理的所有連線。

適用於

另請參閱