C#中字节数组byte[]、图片image、流stream，字符串string、内存流MemoryStream、文件file，之间的转换

c#中字节数组byte[]、图片image、流stream，字符串string、内存流MemoryStream、文件file，之间的转换

c#中字节数组byte[]、图片image、流stream，字符串string、内存流MemoryStream、文件file，之间的转换

/*********字节数组byte[]与图片image之间的转化**********/
//字节数组转换成图片
public static Image byte2img(byte[] buffer)
{
    MemoryStream ms = new MemoryStream(buffer);
    ms.Position = 0;
    Image img = Image.FromStream(ms);
    ms.Close();
    return img;
}


//图片转化为字节数组
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;
}


/**********字节数组byte[]与字符串string之间的编码解码*****/
//字符串到字节数组的编码
public static byte[] str2byte(string str)
{
    byte[] data = System.Text.Encoding.UTF8.GetBytes(param);
    //byte[] data = Convert.FromBase64String(param);
    //有很多种编码方式，可参考:http://blog.csdn.net/luanpeng825485697/article/details/77622243
    return data;
}


//字节数组到字符串的解码
public static string str2byte(byte[] data)
{
    string str = System.Text.Encoding.UTF8.GetString(data);
    //str = Convert.ToBase64String(data);
    //有很多种编码方式，可参考:http://blog.csdn.net/luanpeng825485697/article/details/77622243
    return str;
}

/****字节数组byte[]与内存流MemoryStream之间的转换****/
//字节数组转化为输入内存流
public static MemoryStream byte2stream(byte[] data)
{
    MemoryStream inputStream = new MemoryStream(data);
    return inputStream;
}


//输出内存流转化为字节数组
public static byte[] byte2stream(MemoryStream outStream)
{
    return outStream.ToArray();
}

/************字节数组byte[]与流stream之间的转换********/
//将 Stream 转成 byte[]
public byte[] stream2byte(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 byte2stream(byte[] bytes)
{
    Stream stream = new MemoryStream(bytes);
    return stream;
}

流Stream 和 文件file之间的转换

//将 Stream 写入文件
public void stream2file(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();
}


//从文件读取 Stream
public Stream file2stream(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;
}