FileWebRequest.EndGetResponse(IAsyncResult) FileWebRequest.EndGetResponse(IAsyncResult) FileWebRequest.EndGetResponse(IAsyncResult) FileWebRequest.EndGetResponse(IAsyncResult) Method

Definition

Ends an asynchronous request for a file system resource.

public:
 override System::Net::WebResponse ^ EndGetResponse(IAsyncResult ^ asyncResult);
public override System.Net.WebResponse EndGetResponse (IAsyncResult asyncResult);
override this.EndGetResponse : IAsyncResult -> System.Net.WebResponse
Public Overrides Function EndGetResponse (asyncResult As IAsyncResult) As WebResponse

Parameters

asyncResult
IAsyncResult IAsyncResult IAsyncResult IAsyncResult

An IAsyncResult that references the pending request for a response.

Returns

A WebResponse that contains the response from the file system resource.

Exceptions

Examples

The following code example uses the EndGetResponse method to end an asynchronous request for a file system resource.

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;
	}
}


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 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

Remarks

The EndGetResponse method completes an asynchronous request for a file system resource that was started with the BeginGetResponse method.

Applies to

See also