1 比特?cái)?shù)組轉(zhuǎn)圖片

public static Image byteToImg(byte[] buffer)
{
    MemoryStream ms = new MemoryStream(buffer);
    ms.Position = 0;
    Image img = Image.FromStream(ms);
    ms.Close();
    return img;
}

2 圖片轉(zhuǎn)比特?cái)?shù)組

public static byte[] byte2img(Bitmap Bit)
{
    byte[] back = null;
    MemoryStream ms = new MemoryStream();
    Bit.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
    back = ms.GetBuffer();
    return back;
}

3 字符串轉(zhuǎn)比特?cái)?shù)組

public static byte[] str2byte(string str)
{
    byte[] data = System.Text.Encoding.UTF8.GetBytes(param);
    //byte[] data = Convert.FromBase64String(param);
    //有很多種編碼方式，可參考:http://blog.csdn.net/luanpeng825485697/article/details/77622243
    return data;
}

4 比特?cái)?shù)組轉(zhuǎn)字符串

public static string str2byte(byte[] data)
{
    string str = System.Text.Encoding.UTF8.GetString(data);
    //str = Convert.ToBase64String(data);
    //有很多種編碼方式，可參考:http://blog.csdn.net/luanpeng825485697/article/details/77622243
    return str;
}

5 內(nèi)存流轉(zhuǎn)比特?cái)?shù)組

public static byte[] byte2stream(MemoryStream outStream)
{
    return outStream.ToArray();
}
public byte[] stream2byte(Stream stream)
{
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 設(shè)置當(dāng)前流的位置為流的開(kāi)始
    stream.Seek(0, SeekOrigin.Begin);
    return bytes;
}

6 比特?cái)?shù)組轉(zhuǎn)內(nèi)存流

public Stream byte2stream(byte[] bytes)
{
    Stream stream = new MemoryStream(bytes);
    return stream;
}

7 流的寫(xiě)入文件

public void stream2file(Stream stream,string fileName)
{
    // 把 Stream 轉(zhuǎn)換成 byte[]
    byte[] bytes = new byte[stream.Length];
    stream.Read(bytes, 0, bytes.Length);
    // 設(shè)置當(dāng)前流的位置為流的開(kāi)始
    stream.Seek(0, SeekOrigin.Begin);
    // 把 byte[] 寫(xiě)入文件
    FileStream fs = new FileStream(fileName, FileMode.Create);
    BinaryWriter bw = new BinaryWriter(fs);
    bw.Write(bytes);
    bw.Close();
    fs.Close();
}

8 文件的讀取

public Stream file2stream(string fileName)
{            
    // 打開(kāi)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(zhuǎn)換成 Stream
    Stream stream = new MemoryStream(bytes);
    return stream;
}