Windows 8 学习笔记(八)--各种流之间的转换

gqinvs

　　今天在Stream与IrandomAccessStream之间转换时，感觉很纠结，所以干脆先把想到的一些场景都罗列了一下，希望下次再用的时候就不用这么毛手毛脚的了。。。
　　Stream 转IRandomAccessStream

方法一：
byte[] bytes = StreamToBytes(stream);
InMemoryRandomAccessStream memoryStream = new InMemoryRandomAccessStream();
DataWriter datawriter = new DataWriter(memoryStream.GetOutputStreamAt(0));
datawriter.WriteBytes(bytes);
await datawriter.StoreAsync();方法二：
var randomAccessStream = new InMemoryRandomAccessStream();
var outputStream = randomAccessStream.GetOutputStreamAt(0);
await RandomAccessStream.CopyAsync(stream.AsInputStream(), outputStream);

　　IRandomAccessStream转 Stream

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


　　Ibuffer转Stream

Stream stream = WindowsRuntimeBufferExtensions.AsStream(buffer);

　　Stream转Ibuffer

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[]

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

　　Byte[]转Ibuffer

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

　　Ibuffer转IrandomAccessStream

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

　　IrandomAccessStream转Ibuffer

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

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

　　IRandomAccessStream转FileOutputStream

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

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

　　Stream转MemoryStream

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;
}应该还有些其它的场景,目前就想到这些,绕晕了都,恩恩…