C# 之 Stream 和 byte[] 的相关转换

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

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);      

3、Stream 和 byte[] 之间的相互转换

/// 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;     }      

4、Stream 和 文件之间的转换

// 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;     }      

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();