C# 之 Stream 和 byte[] 的相关转换

港控/mmm° 2023-06-05 11:14 89阅读 0赞

[ 转载自][Link 1]

1、二进制转换为图片

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

2、二进制与字符串的相互转换

![复制代码][copycode.gif]

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);

![复制代码][copycode.gif]

3、Stream 和 byte\[\] 之间的相互**转换**

![复制代码][copycode.gif]

/// 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;
    }

![复制代码][copycode.gif]

4、Stream 和 文件之间的**转换**

![复制代码][copycode.gif]

// 将Stream读取到文件
    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();
    }
    
    
    // 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;
    }

![复制代码][copycode.gif]

5、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();

转载于:https://www.cnblogs.com/macT/p/11390339.html

[Link 1]: https://www.cnblogs.com/xinaixia/p/4788077.html
[copycode.gif]: /images/20230601/4a3bfb6326d0481295ead0c4e74a7efc.png