win8 metro 各种格式转换

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　　转自晶晶博客（http://www.iyunv.com/jing870812/archive/2012/04/12/2444870.html）
　　Stream 转IRandomAccessStream




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方法一： byte[] bytes = StreamToBytes(stream); InMemoryRandomAccessStream memoryStream = new InMemoryRandomAccessStream(); DataWriter datawriter = new DataWriter(memoryStream.GetOutputStreamAt(0)); datawriter.WriteBytes(bytes); await datawriter.StoreAsync();

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方法二： var randomAccessStream = new InMemoryRandomAccessStream(); var outputStream = randomAccessStream.GetOutputStreamAt(0); await RandomAccessStream.CopyAsync(stream.AsInputStream(), outputStream);

?　　IRandomAccessStream转 Stream




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Stream stream=WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0));

　　Ibuffer转Stream




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Stream stream = WindowsRuntimeBufferExtensions.AsStream(buffer);

?　　Stream转Ibuffer




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MemoryStream memoryStream = new MemoryStream();             if (stream != null) {       byte[] bytes = ReadFully(stream);       if (bytes != null)       {            var binaryWriter = new BinaryWriter(memoryStream);            binaryWriter.Write(bytes);        }   }   IBuffer buffer=WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream,0,(int)memoryStream.Length);

　　Ibuffer转byte[]




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byte[] bytes=WindowsRuntimeBufferExtensions.ToArray(buffer,0,(int)buffer.Length);

　　
　　Byte[]转Ibuffer




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WindowsRuntimeBufferExtensions.AsBuffer(bytes,0,bytes.Length);

　　
　　Ibuffer转IrandomAccessStream




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InMemoryRandomAccessStream inStream = new InMemoryRandomAccessStream(); DataWriter datawriter = new DataWriter(inStream.GetOutputStreamAt(0)); datawriter.WriteBuffer(buffer,0,buffer.Length); await datawriter.StoreAsync();

　　
　　IrandomAccessStream转Ibuffer




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Stream stream=WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0)); MemoryStream memoryStream = new MemoryStream();             if (stream != null) {     byte[] bytes = ReadFully(stream);     if (bytes != null)     {         var binaryWriter = new BinaryWriter(memoryStream);         binaryWriter.Write(bytes);     } }   IBuffer buffer=WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream,0,(int)memoryStream.Length);

　　
　　IRandomAccessStream转FileInputStream




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FileInputStream inputStream=randomStream.GetInputStreamAt(0) as FileInputStream;

　　
　　IRandomAccessStream转FileOutputStream




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FileOutputStream outStream= randomStream.GetOutputStreamAt(0) as FileOutputStream;

　　
　　Stream转byte[]
　　public static byte[] ConvertStreamTobyte(Stream input)
　　{
　　byte[] buffer = new byte[16 * 1024];
　　using (MemoryStream ms = new MemoryStream())
　　{
　　int read;
　　while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
　　{
　　ms.Write(buffer, 0, read);
　　}
　　return ms.ToArray();
　　}
　　}
　　
　　Byte转Stream




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public Stream BytesToStream(byte[] bytes)         {             Stream stream = new MemoryStream(bytes);             return stream;         }

　　
　　Stream转MemoryStream




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public static MemoryStream ConvertStreamToMemoryStream(Stream stream)         {               MemoryStream memoryStream = new MemoryStream();             if (stream != null)             {                 byte[] buffer = ReadFully(stream);                 if (buffer != null)                 {                     var binaryWriter = new BinaryWriter(memoryStream);                     binaryWriter.Write(buffer);                 }               }               return memoryStream;         }