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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)
'Declaration
Public Overrides Function EndGetRequestStream ( _
	asyncResult As IAsyncResult _
) As Stream

Parameters

asyncResult
Type: System.IAsyncResult

An IAsyncResult that references the pending request for a stream.

Return Value

Type: System.IO.Stream
A Stream object that the application uses to write data.
ExceptionCondition
ArgumentNullException

asyncResult is Nothing.

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 myFileWebRequest As FileWebRequest
    Public userinput As [String]


    Public Sub New()
        myFileWebRequest = Nothing 
    End Sub ' New 
End Class ' RequestDeclare


Class FileWebRequest_reqbeginend
    Public Shared allDone As New ManualResetEvent(False)

    ' Entry point which delegates to C-style main Private Function. 
    Public Overloads Shared Sub Main()
        Main(System.Environment.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_reqbeginend <systemname>/<sharedfoldername>/<filename>")
	    Console.WriteLine("Example: FileWebRequest_reqbeginend 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 associate the 'myWebRequest' to it.		 
                Dim requestDeclare As New RequestDeclare()
                requestDeclare.myFileWebRequest = CType(myWebRequest, FileWebRequest)
                ' 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 . 
                Dim r As IAsyncResult = CType(requestDeclare.myFileWebRequest.BeginGetRequestStream(AddressOf ReadCallback, requestDeclare), IAsyncResult)
                allDone.WaitOne()

                Console.Read()
            Catch e As ProtocolViolationException
                Console.WriteLine(("ProtocolViolationException is :" + e.Message))
            Catch e As InvalidOperationException
                Console.WriteLine(("InvalidOperationException is :" + e.Message))
            Catch e As UriFormatException
                Console.WriteLine(("UriFormatExceptionException is :" + e.Message))
            End Try 

        End If  
    End Sub 'Main


    Private Shared Sub ReadCallback(ar As IAsyncResult)
        Try 

            ' State of the request is asynchronous. 
            Dim requestDeclare As RequestDeclare = CType(ar.AsyncState, RequestDeclare)
            Dim myFileWebRequest As FileWebRequest = requestDeclare.myFileWebRequest
            Dim sendToFile As [String] = requestDeclare.userinput

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

            ' Convert the string into byte array. 
            Dim encoder As New ASCIIEncoding()
            Dim byteArray As Byte() = encoder.GetBytes(sendToFile)

            ' Write to the stream.
            readStream.Write(byteArray, 0, sendToFile.Length)
            readStream.Close()
            allDone.Set()


            Console.WriteLine(ControlChars.Cr +"The String you entered was successfully written into the file.")
            Console.WriteLine(ControlChars.Cr +"Press Enter to continue.")

            Catch e As ApplicationException
            Console.WriteLine(("ApplicationException is :" + e.Message))
        End Try 

    End Sub ' ReadCallback 

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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