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FileWebRequest.EndGetRequestStream Method

Ends an asynchronous request for a Stream instance that the application uses to write data.

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

public override Stream EndGetRequestStream (
	IAsyncResult asyncResult
)
public Stream EndGetRequestStream (
	IAsyncResult asyncResult
)
public override function EndGetRequestStream (
	asyncResult : IAsyncResult
) : Stream

Parameters

asyncResult

An IAsyncResult that references the pending request for a stream.

Return Value

A Stream object that the application uses to write data.
Exception typeCondition

ArgumentNullException

asyncResult is a null reference (Nothing in Visual Basic).

The EndGetRequestStream method completes an asynchronous stream request that was started by the BeginGetRequestStream method.

NoteNote

To avoid timing issues with garbage collection, be sure to close the response stream by calling the Close method on the stream returned by the GetResponseStream method after calling the EndGetResponse method.

The following example uses the EndGetRequestStream method to end the asynchronous request for a Stream object.


public class RequestDeclare
{
     public FileWebRequest myFileWebRequest;    
     public String userinput;
   
     public RequestDeclare()
    {
        myFileWebRequest = null;
    }
}

class FileWebRequest_reqbeginend
{
    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_reqbeginend <systemname>/<sharedfoldername>/<filename>\nExample:FileWebRequest_reqbeginend shafeeque/shaf/hello.txt");
        
      }  
      else
      {

        try
         {

              // Place a webrequest.
              WebRequest myWebRequest= WebRequest.Create("file://"+args[0]);
           
              // Create an instance of the 'RequestDeclare' and associate the 'myWebRequest' to it.        
              RequestDeclare requestDeclare = new RequestDeclare();
              requestDeclare.myFileWebRequest = (FileWebRequest)myWebRequest;
              // Set the 'Method' property of 'FileWebRequest' object to 'POST' method.
              requestDeclare.myFileWebRequest.Method="POST";
              Console.WriteLine("Enter the string you want to write into the file:");
              requestDeclare.userinput = Console.ReadLine();

              // Begin the Asynchronous request for getting file content using 'BeginGetRequestStream()' method .
              IAsyncResult r=(IAsyncResult) requestDeclare.myFileWebRequest.BeginGetRequestStream(new AsyncCallback(ReadCallback),requestDeclare);            
              allDone.WaitOne();

              Console.Read();
        }
        catch(ProtocolViolationException e)
        {
              Console.WriteLine("ProtocolViolationException is :"+e.Message);
        }
        catch(InvalidOperationException e)
        {
               Console.WriteLine("InvalidOperationException is :"+e.Message);
        }
        catch(UriFormatException e)
        {
            Console.WriteLine("UriFormatExceptionException is :"+e.Message);
         }
     }
    }

    private static void ReadCallback(IAsyncResult ar)
    {    

     try
     {

          // State of the request is asynchronous.
          RequestDeclare requestDeclare=(RequestDeclare) ar.AsyncState;
          FileWebRequest myFileWebRequest=requestDeclare.myFileWebRequest;
          String sendToFile = requestDeclare.userinput;

          // End the Asynchronus request by calling the 'EndGetRequestStream()' method.
          Stream readStream=myFileWebRequest.EndGetRequestStream(ar);
                    
          // Convert the string into byte array.
            
          ASCIIEncoding encoder = new ASCIIEncoding();
          byte[] byteArray = encoder.GetBytes(sendToFile);
        
          // Write to the stream.
          readStream.Write(byteArray,0,sendToFile.Length);
          readStream.Close();
          allDone.Set();
            
          Console.WriteLine("\nThe String you entered was successfully written into the file.");
         Console.WriteLine("\nPress Enter to continue.");    


     }
    catch(ApplicationException e)
      {
          Console.WriteLine("ApplicationException is :"+e.Message);
      }                

    }

    public FileWebRequest myFileWebRequest;
    public String userInput;

    public RequestDeclare()
    {
        myFileWebRequest = null;
    } //RequestDeclare
} //RequestDeclare

class FileWebRequestReqBeginEnd
{
    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_reqbeginend <systemname>" 
                + "/<sharedfoldername>/<filename>\nExample:" 
                + "FileWebRequest_reqbeginend shafeeque/shaf/hello.txt");
        }
        else {
            try {
                // Place a webrequest.
                WebRequest myWebRequest = WebRequest.Create("file://" 
                    + args[0]);

                // Create an instance of the 'RequestDeclare' and associate
                // the 'myWebRequest' to it.        
                RequestDeclare requestDeclare = new RequestDeclare();
                requestDeclare.myFileWebRequest = 
                    (FileWebRequest)(myWebRequest);

                // Set the 'Method' property of 'FileWebRequest' object to
                // 'POST' method.
                requestDeclare.myFileWebRequest.set_Method("POST");
                Console.WriteLine("Enter the string you want to write into " 
                    + " the file:");
                requestDeclare.userInput = Console.ReadLine();

                // Begin the Asynchronous request for getting file content
                // using 'BeginGetRequestStream()' method .
                IAsyncResult r = (IAsyncResult)(requestDeclare.
                    myFileWebRequest.BeginGetRequestStream(new AsyncCallback(
                    ReadCallback), requestDeclare));
                allDone.WaitOne();
                Console.Read();
            }
            catch (ProtocolViolationException e) {
                Console.WriteLine("ProtocolViolationException is :" 
                    + e.get_Message());
            }
            catch (InvalidOperationException e) {
                Console.WriteLine("InvalidOperationException is :" 
                    + e.get_Message());
            }
            catch (UriFormatException e) {
                Console.WriteLine("UriFormatExceptionException is :" 
                    + e.get_Message());
            }
        }
    } //main

    private static void ReadCallback(IAsyncResult ar)
    {
        try {
            // State of the request is asynchronous.
            RequestDeclare requestDeclare = (RequestDeclare)(
                ar.get_AsyncState());
            FileWebRequest myFileWebRequest = requestDeclare.myFileWebRequest;
            String sendToFile = requestDeclare.userInput;

            // End the Asynchronus request by calling the
            // 'EndGetRequestStream()' method.
            Stream readStream = myFileWebRequest.EndGetRequestStream(ar);

            // Convert the string into byte array.
            ASCIIEncoding encoder = new ASCIIEncoding();
            ubyte byteArray[] = encoder.GetBytes(sendToFile);

            // Write to the stream.
            readStream.Write(byteArray, 0, sendToFile.get_Length());
            readStream.Close();
            allDone.Set();
            Console.WriteLine("\nThe String you entered was successfully " 
                + "written into the file.");
            Console.WriteLine("\nPress Enter to continue.");
        }
        catch (ApplicationException e) {
            Console.WriteLine("ApplicationException is :" + e.get_Message());
        }
    } //ReadCallback

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

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

.NET Framework

Supported in: 2.0, 1.1, 1.0
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