Stream.CopyTo Method (System.IO) (original) (raw)

Source:

Stream.cs

Source:

Stream.cs

Source:

Stream.cs

Source:

Stream.cs

Reads the bytes from the current stream and writes them to another stream. Both streams positions are advanced by the number of bytes copied.

public:
 void CopyTo(System::IO::Stream ^ destination);

public void CopyTo(System.IO.Stream destination);

member this.CopyTo : System.IO.Stream -> unit

Public Sub CopyTo (destination As Stream)

Parameters

destination

Stream

The stream to which the contents of the current stream will be copied.

Exceptions

The current stream does not support reading.

-or-

destination does not support writing.

Either the current stream or destination were closed before the CopyTo(Stream) method was called.

Examples

The following example copies the contents of a FileStream to a MemoryStream.

// Create the streams.
MemoryStream destination = new MemoryStream();

using (FileStream source = File.Open(@"c:\temp\data.dat",
    FileMode.Open))
{

    Console.WriteLine("Source length: {0}", source.Length.ToString());

    // Copy source to destination.
    source.CopyTo(destination);
}

Console.WriteLine("Destination length: {0}", destination.Length.ToString());

' Create the streams.
Dim destination As New MemoryStream()

Using source As FileStream = File.Open("c:\temp\data.dat", _
                                       FileMode.Open)
    Console.WriteLine("Source length: {0}", source.Length.ToString())

    ' Copy source to destination.
    source.CopyTo(destination)

End Using
Console.WriteLine("Destination length: {0}", destination.Length.ToString())

Remarks

Copying begins at the current position in the current stream, and does not reset the position of the destination stream after the copy operation is complete.

Applies to