一. 二进制转换成图片
| 1 2 3 4 5 | 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.
| 1 2 3 | System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding(); byte [] inputBytes =converter.GetBytes(inputString); string inputString = converter.GetString(inputBytes); |
2.
| 1 2 3 | 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
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | /// 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
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | 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
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | 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[]
| 1 2 3 4 5 6 | //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(); |