C# Stream 和 byte[] 之间的转换(文件流的应用)

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);2、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 Streampublic 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 Streampublic 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;}