Byte[],Stream,Ibuffer,IRandomAccessStream等之间的互相转换（rt,8.1可用,部分Sliverlight 8.1可用）

全段时间做程序，非要让我从IRandomAccessStream类型转换为Byte[]类型，然后我花了九牛二虎之力搞定，顺便整理了下几种不同类型之间的转换方法。。。
Stream 转IRandomAccessStream
方法一：

1. byte[] bytes = StreamToBytes(stream);
   
2. InMemoryRandomAccessStream memoryStream = new InMemoryRandomAccessStream();
   
3. DataWriter datawriter = new DataWriter(memoryStream.GetOutputStreamAt(0));
   
4. datawriter.WriteBytes(bytes);
   
5. await datawriter.StoreAsync();
   

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方法二：

1. var randomAccessStream = new InMemoryRandomAccessStream();
   
2. var outputStream = randomAccessStream.GetOutputStreamAt(0);
   
3. await RandomAccessStream.CopyAsync(stream.AsInputStream(), outputStream);

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IRandomAccessStream 转 Stream 

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

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Ibuffer转Stream

1. Stream stream = WindowsRuntimeBufferExtensions.AsStream(buffer);

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Stream转Ibuffer 

1. 
   
2. MemoryStream memoryStream = new MemoryStream();            
   
3. if (stream != null)
   
4. {
   
5.       byte[] bytes = ReadFully(stream);
   
6.       if (bytes != null)
   
7.       {
   
8.            var binaryWriter = new BinaryWriter(memoryStream);
   
9.            binaryWriter.Write(bytes);
   
10.        }
    
11.   } 
    
12. IBuffer buffer=WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream,0,(int)memoryStream.Length);

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Ibuffer转byte[] 

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

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Byte[]转Ibuffer 

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

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Ibuffer转IrandomAccessStream 

1. 
   
2. InMemoryRandomAccessStream inStream = new InMemoryRandomAccessStream();
   
3. DataWriter datawriter = new DataWriter(inStream.GetOutputStreamAt(0));
   
4. datawriter.WriteBuffer(buffer,0,buffer.Length);
   
5. await datawriter.StoreAsync();

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IrandomAccessStream转Ibuffer 

1. 
   
2. Stream stream=WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0));
   
3. MemoryStream memoryStream = new MemoryStream();            
   
4. if (stream != null)
   
5. {
   
6.     byte[] bytes = ReadFully(stream);
   
7.     if (bytes != null)
   
8.     {
   
9.         var binaryWriter = new BinaryWriter(memoryStream);
   
10.         binaryWriter.Write(bytes);
    
11.     }
    
12. } 
    
13. IBuffer buffer=WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream,0,(int)memoryStream.Length);

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Stream转byte[]

1. public static byte[] ConvertStreamTobyte(Stream input)
   
2. {
   
3. byte[] buffer = new byte[16 * 1024];
   
4. using (MemoryStream ms = new MemoryStream())
   
5.   {
   
6.    int read;
   
7.    while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
   
8.     {
   
9.      ms.Write(buffer, 0, read);
   
10.     }
    
11.    return ms.ToArray();
    
12.   }
    
13. }
    

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byte[]转Stream

1. 
   
2. public Stream BytesToStream(byte[] bytes)
   
3.         {
   
4.             Stream stream = new MemoryStream(bytes);
   
5.             return stream;
   
6.         }

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Stream转MemoryStream

1. 
   
2. public static MemoryStream ConvertStreamToMemoryStream(Stream stream)
   
3.         { 
   
4.             MemoryStream memoryStream = new MemoryStream();
   
5.             if (stream != null)
   
6.             {
   
7.                 byte[] buffer = ReadFully(stream);
   
8.                 if (buffer != null)
   
9.                 {
   
10.                     var binaryWriter = new BinaryWriter(memoryStream);
    
11.                     binaryWriter.Write(buffer);
    
12.                 } 
    
13.             } 
    
14.             return memoryStream;
    
15.         }

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IrandomAccessStream转byte[]

1. 
   
2. Stream stream = WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0));
   
3. MemoryStream ms = new MemoryStream();
   
4. await stream.CopyToAsync(ms);
   
5. byte[] bytes = ms.ToArray();

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