C#中二进制和流之间的各种相互转换

一. 二进制转换成图片间的转换

 MemoryStream ms = new MemoryStream(bytes); 
ms.Position = 0; 
Image img = Image.FromStream(ms); 
ms.Close(); 
this.pictureBox1.Image

二. C#中byte[]与string的转换代码

 System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding(); 
　　byte[] inputBytes =converter.GetBytes(inputString); 
　　string inputString = converter.GetString(inputBytes);

 string inputString = System.Convert.ToBase64String(inputBytes); 
　　byte[] inputBytes = System.Convert.FromBase64String(inputString); 
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);

三. C# Stream 和 byte[] 之间的转换

 /// 将 Stream 转成 byte[] 
  
public byte[] StreamToBytes(Stream stream) 
{ 
    byte[] bytes = new byte[stream.Length]; 
    stream.Read(bytes, 0, bytes.Length); 
    // 设置当前流的位置为流的开始 
    stream.Seek(0, SeekOrigin.Begin); 
    return bytes; 
} 
  
/// 将 byte[] 转成 Stream 
  
public Stream BytesToStream(byte[] bytes) 
{ 
    Stream stream = new MemoryStream(bytes); 
    return stream; 
}

四. Stream 和文件之间的转换

将 Stream 写入文件

 public void StreamToFile(Stream stream,string fileName) 
{ 
    // 把 Stream 转换成 byte[] 
    byte[] bytes = new byte[stream.Length]; 
    stream.Read(bytes, 0, bytes.Length); 
    // 设置当前流的位置为流的开始 
    stream.Seek(0, SeekOrigin.Begin); 
    // 把 byte[] 写入文件 
    FileStream fs = new FileStream(fileName, FileMode.Create); 
    BinaryWriter bw = new BinaryWriter(fs); 
    bw.Write(bytes); 
    bw.Close(); 
    fs.Close(); 
}

五. 从文件读取 Stream

 public Stream FileToStream(string fileName) 
{             
    // 打开文件 
    FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); 
    // 读取文件的 byte[] 
    byte[] bytes = new byte[fileStream.Length]; 
    fileStream.Read(bytes, 0, bytes.Length); 
    fileStream.Close(); 
    // 把 byte[] 转换成 Stream 
    Stream stream = new MemoryStream(bytes); 
    return stream; 
  
  
}

六Bitmap 转化为 Byte[]

 //Bitmap 转化为 Byte[] 
                Bitmap BitReturn = new Bitmap(); 
                byte[] bReturn = null; 
                MemoryStream ms = new MemoryStream(); 
                BitReturn.Save(ms, System.Drawing.Imaging.ImageFormat.Png); 
                bReturn = ms.GetBuffer();