Windows 8 學習筆記(八)–各種流之間的轉換

今天在Stream與IrandomAccessStream之間轉換時，感覺很糾結，所以乾脆先把想到的一些情境都羅列了一下，希望下次再用的時候就不用這麼毛手毛腳的了。。。

Stream 轉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 轉 Stream

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

 

Ibuffer轉Stream

Stream stream = WindowsRuntimeBufferExtensions.AsStream(buffer);

Stream轉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轉byte[]

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

 

Byte[]轉Ibuffer

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

 

Ibuffer轉IrandomAccessStream

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

 

IrandomAccessStream轉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轉FileInputStream

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

 

IRandomAccessStream轉FileOutputStream

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

 

Stream轉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轉Stream

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

 

Stream轉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;        }

應該還有些其它的情境,目前就想到這些,繞暈了都,恩恩…