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FileWebRequest.EndGetResponse Method

Ends an asynchronous request for a file system resource.

Namespace:  System.Net
Assembly:  System (in System.dll)

public override WebResponse EndGetResponse(
	IAsyncResult asyncResult
)

Parameters

asyncResult
Type: System.IAsyncResult
An IAsyncResult that references the pending request for a response.

Return Value

Type: System.Net.WebResponse
A WebResponse that contains the response from the file system resource.

ExceptionCondition
ArgumentNullException

asyncResult is null.

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

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



	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.");	
		}

	}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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