Stream 和 byte[] 之间的转换

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一. 二进制转换成图片

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
1.

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

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