FileWebRequest.EndGetResponse-Methode
Beendet eine asynchrone Anforderung einer Dateisystemressource.
Namespace: System.Net
Assembly: System (in system.dll)
Syntax
'Declaration
Public Overrides Function EndGetResponse ( _
asyncResult As IAsyncResult _
) As WebResponse
'Usage
Dim instance As FileWebRequest
Dim asyncResult As IAsyncResult
Dim returnValue As WebResponse
returnValue = instance.EndGetResponse(asyncResult)
public override WebResponse EndGetResponse (
IAsyncResult asyncResult
)
public:
virtual WebResponse^ EndGetResponse (
IAsyncResult^ asyncResult
) override
public WebResponse EndGetResponse (
IAsyncResult asyncResult
)
public override function EndGetResponse (
asyncResult : IAsyncResult
) : WebResponse
Parameter
- asyncResult
Ein IAsyncResult, das auf die ausstehende Anforderung einer Antwort verweist.
Rückgabewert
Eine WebResponse mit der Antwort der Dateisystemressource.
Ausnahmen
| Ausnahmetyp | Bedingung |
|---|---|
asyncResult ist NULL (Nothing in Visual Basic). |
Hinweise
Die EndGetResponse-Methode schließt eine asynchrone Anforderung einer Dateisystemressource ab, die durch die BeginGetResponse-Methode gestartet wurde.
Beispiel
Im folgenden Codebeispiel wird die EndGetResponse-Methode zum Beenden einer asynchronen Anforderung einer Dateisystemressource verwendet.
Public Class RequestDeclare
Public myFileWebRequest As FileWebRequest
Public Sub New()
myFileWebRequest = Nothing
End Sub ' New
End Class ' RequestDeclare
Class FileWebRequest_resbeginend
Public Shared allDone As New ManualResetEvent(False)
' Entry point which delegates to C-style main Private Function.
Public Overloads Shared Sub Main()
Main(GetCommandLineArgs())
End Sub
Overloads Shared Sub Main(args() As String)
If args.Length < 2 Then
Console.WriteLine(ControlChars.Cr + "Please enter the file name as command line parameter:")
Console.WriteLine("Usage:FileWebRequest_resbeginend " + ChrW(60) + "systemname" + ChrW(62) + "/" + ChrW(60) + "sharedfoldername" + ChrW(62) + "/" + ChrW(60) + "filename" + ChrW(62) + ControlChars.Cr + "Example:FileWebRequest_resbeginend shafeeque/shaf/hello.txt")
Else
Try
' Place a webrequest.
Dim myWebRequest As WebRequest = WebRequest.Create(("file://" + args(1)))
' Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.
Dim myRequestDeclare As New RequestDeclare()
myRequestDeclare.myFileWebRequest = CType(myWebRequest, FileWebRequest)
' Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.
Dim asyncResult As IAsyncResult = CType(myRequestDeclare.myFileWebRequest.BeginGetResponse(AddressOf RespCallback, myRequestDeclare), IAsyncResult)
allDone.WaitOne()
Catch e As ArgumentNullException
Console.WriteLine(("ArgumentNullException is :" + e.Message))
Catch e As UriFormatException
Console.WriteLine(("UriFormatException is :" + e.Message))
End Try
End If
End Sub ' Main
Private Shared Sub RespCallback(ar As IAsyncResult)
' State of request is asynchronous.
Dim requestDeclare As RequestDeclare = CType(ar.AsyncState, RequestDeclare)
Dim myFileWebRequest As FileWebRequest = requestDeclare.myFileWebRequest
' End the Asynchronus request by calling the 'EndGetResponse()' method.
Dim myFileWebResponse As FileWebResponse = CType(myFileWebRequest.EndGetResponse(ar), FileWebResponse)
' Reade the response into Stream.
Dim streamReader As New StreamReader(myFileWebResponse.GetResponseStream())
Dim readBuffer(256) As [Char]
Dim count As Integer = streamReader.Read(readBuffer, 0, 256)
Console.WriteLine("The contents of the file are :"+ControlChars.Cr)
While count > 0
Dim str As New [String](readBuffer, 0, count)
Console.WriteLine(str)
count = streamReader.Read(readBuffer, 0, 256)
End While
streamReader.Close()
' Release the response object resources.
myFileWebResponse.Close()
allDone.Set()
Console.WriteLine("File reading is over.")
End Sub ' RespCallback
End Class ' FileWebRequest_resbeginend
public class RequestDeclare
{
public FileWebRequest myFileWebRequest;
public RequestDeclare()
{
myFileWebRequest = null;
}
}
class FileWebRequest_resbeginend
{
public static ManualResetEvent allDone = new ManualResetEvent(false);
static void Main(string[] args)
{
if (args.Length < 1)
{
Console.WriteLine("\nPlease enter the file name as command line parameter:");
Console.WriteLine("Usage:FileWebRequest_resbeginend <systemname>/<sharedfoldername>/<filename>\nExample:FileWebRequest_resbeginend shafeeque/shaf/hello.txt");
}
else
{
try
{
// Place a 'Webrequest'.
WebRequest myWebRequest= WebRequest.Create("file://"+args[0]);
// Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.
RequestDeclare myRequestDeclare = new RequestDeclare();
myRequestDeclare.myFileWebRequest = (FileWebRequest)myWebRequest;
// Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.
IAsyncResult asyncResult =(IAsyncResult) myRequestDeclare.myFileWebRequest.BeginGetResponse(new AsyncCallback(RespCallback),myRequestDeclare);
allDone.WaitOne();
}
catch(ArgumentNullException e)
{
Console.WriteLine("ArgumentNullException is :"+e.Message);
}
catch(UriFormatException e)
{
Console.WriteLine("UriFormatException is :"+e.Message);
}
}
}
private static void RespCallback(IAsyncResult ar)
{
// State of request is asynchronous.
RequestDeclare requestDeclare=(RequestDeclare) ar.AsyncState;
FileWebRequest myFileWebRequest=requestDeclare.myFileWebRequest;
// End the Asynchronus request by calling the 'EndGetResponse()' method.
FileWebResponse myFileWebResponse = (FileWebResponse) myFileWebRequest.EndGetResponse(ar);
// Reade the response into Stream.
StreamReader streamReader= new StreamReader(myFileWebResponse.GetResponseStream());
Char[] readBuffer = new Char[256];
int count = streamReader.Read( readBuffer, 0, 256 );
Console.WriteLine("The contents of the file are :\n");
while (count > 0)
{
String str = new String(readBuffer, 0, count);
Console.WriteLine(str);
count = streamReader.Read(readBuffer, 0, 256);
}
streamReader.Close();
// Release the response object resources.
myFileWebResponse.Close();
allDone.Set();
Console.WriteLine("File reading is over.");
}
}
public ref class RequestDeclare
{
public:
FileWebRequest^ myFileWebRequest;
RequestDeclare()
{
myFileWebRequest = nullptr;
}
};
ref class FileWebRequest_resbeginend
{
public:
static ManualResetEvent^ allDone = gcnew ManualResetEvent( false );
static void RespCallback( IAsyncResult^ ar )
{
// State of request is asynchronous.
RequestDeclare^ requestDeclare = dynamic_cast<RequestDeclare^>(ar->AsyncState);
FileWebRequest^ myFileWebRequest = requestDeclare->myFileWebRequest;
// End the Asynchronus request by calling the 'EndGetResponse()' method.
FileWebResponse^ myFileWebResponse = dynamic_cast<FileWebResponse^>(myFileWebRequest->EndGetResponse( ar ));
// Reade the response into Stream.
StreamReader^ streamReader = gcnew StreamReader( myFileWebResponse->GetResponseStream() );
array<Char>^readBuffer = gcnew array<Char>(256);
int count = streamReader->Read( readBuffer, 0, 256 );
Console::WriteLine( "The contents of the file are :\n" );
while ( count > 0 )
{
String^ str = gcnew String( readBuffer,0,count );
Console::WriteLine( str );
count = streamReader->Read( readBuffer, 0, 256 );
}
streamReader->Close();
// Release the response Object* resources.
myFileWebResponse->Close();
allDone->Set();
Console::WriteLine( "File reading is over." );
}
};
int main()
{
array<String^>^args = Environment::GetCommandLineArgs();
if ( args->Length < 2 )
{
Console::WriteLine( "\nPlease enter the file name as command line parameter:" );
Console::WriteLine( "Usage:FileWebRequest_resbeginend <systemname>/<sharedfoldername>/<filename>\n" );
Console::WriteLine( "Example:FileWebRequest_resbeginend shafeeque/shaf/hello.txt" );
}
else
{
try
{
// Place a 'Webrequest'.
WebRequest^ myWebRequest = WebRequest::Create( String::Concat( "file://", args[ 1 ] ) );
// Create an instance of the 'RequestDeclare' and associating the 'myWebRequest' to it.
RequestDeclare^ myRequestDeclare = gcnew RequestDeclare;
myRequestDeclare->myFileWebRequest = dynamic_cast<FileWebRequest^>(myWebRequest);
// Begin the Asynchronous request for getting file content using 'BeginGetResponse()' method.
IAsyncResult^ asyncResult = dynamic_cast<IAsyncResult^>(myRequestDeclare->myFileWebRequest->BeginGetResponse( gcnew AsyncCallback( &FileWebRequest_resbeginend::RespCallback ), myRequestDeclare ));
FileWebRequest_resbeginend::allDone->WaitOne();
}
catch ( ArgumentNullException^ e )
{
Console::WriteLine( "ArgumentNullException is : {0}", e->Message );
}
catch ( UriFormatException^ e )
{
Console::WriteLine( "UriFormatException is : {0}", e->Message );
}
}
}
public class RequestDeclare
{
public FileWebRequest myFileWebRequest;
public RequestDeclare()
{
myFileWebRequest = null;
} //RequestDeclare
} //RequestDeclare
class FileWebRequestResBeginEnd
{
public static ManualResetEvent allDone = new ManualResetEvent(false);
public static void main(String[] args)
{
if (args.length < 1) {
Console.WriteLine("\nPlease enter the file name as command line "
+ " parameter:");
Console.WriteLine("Usage:FileWebRequest_resbeginend <systemname>/"
+ "<sharedfoldername>/<filename>\nExample:"
+ "FileWebRequest_resbeginend shafeeque/shaf/hello.txt");
}
else {
try {
// Place a 'Webrequest'.
WebRequest myWebRequest = WebRequest.Create("file://"
+ args[0]);
// Create an instance of the 'RequestDeclare' and associating
// the 'myWebRequest' to it.
RequestDeclare myRequestDeclare = new RequestDeclare();
myRequestDeclare.myFileWebRequest =
(FileWebRequest)(myWebRequest);
// Begin the Asynchronous request for getting file content
// using 'BeginGetResponse()' method.
IAsyncResult asyncResult = (IAsyncResult)(myRequestDeclare.
myFileWebRequest.BeginGetResponse(new AsyncCallback(
RespCallback), myRequestDeclare));
allDone.WaitOne();
}
catch (ArgumentNullException e) {
Console.WriteLine("ArgumentNullException is :"
+ e.get_Message());
}
catch (UriFormatException e) {
Console.WriteLine("UriFormatException is :"
+ e.get_Message());
}
}
} //main
private static void RespCallback(IAsyncResult ar)
{
// State of request is asynchronous.
RequestDeclare requestDeclare = (RequestDeclare)(ar.
get_AsyncState());
FileWebRequest myFileWebRequest = requestDeclare.myFileWebRequest;
// End the Asynchronus request by calling the
// 'EndGetResponse()' method.
FileWebResponse myFileWebResponse = (FileWebResponse)(myFileWebRequest
.EndGetResponse(ar));
// Reade the response into Stream.
StreamReader streamReader = new StreamReader(myFileWebResponse
.GetResponseStream());
char readBuffer[] = new char[256];
int count = streamReader.Read(readBuffer, 0, 256);
Console.WriteLine("The contents of the file are :\n");
while (count > 0) {
String str = new String(readBuffer, 0, count);
Console.WriteLine(str);
count = streamReader.Read(readBuffer, 0, 256);
}
streamReader.Close();
// Release the response object resources.
myFileWebResponse.Close();
allDone.Set();
Console.WriteLine("File reading is over.");
} //RespCallback
} //FileWebRequestResBeginEnd
Plattformen
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
FileWebRequest-Klasse
FileWebRequest-Member
System.Net-Namespace
GetResponse
BeginGetResponse