Stream 和 byte[] 之間的轉換

1. 二進制轉換成圖片

1.1

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

2. C#中byte[]與string的轉換代碼

2.1

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

2.2

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

3.C# Stream 和 byte[] 之間的轉換

3.1

/// 將 Stream 轉成 byte[]
 
public byte[] StreamToBytes(Stream stream)
{
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 設置當前流的位置爲流的開始
    stream.Seek(0, SeekOrigin.Begin);
    return bytes;
}
 
/// 將 byte[] 轉成 Stream
 
public Stream BytesToStream(byte[] bytes)
{
    Stream stream = new MemoryStream(bytes);
    return stream;
}

4.Stream 和 文件之間的轉換 

4.1 將 Stream 寫入文件

public void StreamToFile(Stream stream,string fileName)
{
    // 把 Stream 轉換成 byte[]
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 設置當前流的位置爲流的開始
    stream.Seek(0, SeekOrigin.Begin);
    // 把 byte[] 寫入文件
    FileStream fs = new FileStream(fileName, FileMode.Create);
    BinaryWriter bw = new BinaryWriter(fs);
    bw.Write(bytes);
    bw.Close();
    fs.Close();
}

5.從文件讀取 Stream

5.1

public Stream FileToStream(string fileName)
{            
    // 打開文件
    FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
    // 讀取文件的 byte[]
    byte[] bytes = new byte[fileStream.Length];
    fileStream.Read(bytes, 0, bytes.Length);
    fileStream.Close();
    // 把 byte[] 轉換成 Stream
    Stream stream = new MemoryStream(bytes);
    return stream;
}

6.Bitmap 轉化爲 Byte[]

6.1

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