C# 之 Stream 和 byte[] 的相關轉換

1、二進制轉換為圖檔

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

2、二進制與字元串的互相轉換

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[] 之間的互相轉換

/// 将 Stream 轉成 byte[]     public byte[] StreamToBytes(Stream stream)     {         byte[] bytes = new byte[stream.Length];         stream.Read(bytes, 0, bytes.Length);         // 設定目前流的位置為流的開始         stream.Seek(0, SeekOrigin.Begin);         return bytes;     }     /// 将 byte[] 轉成 Stream     public Stream BytesToStream(byte[] bytes)     {         Stream stream = new MemoryStream(bytes);         return stream;     }      

4、Stream 和 檔案之間的轉換

// 将Stream讀取到檔案     public void StreamToFile(Stream stream,string fileName)     {         // 把 Stream 轉換成 byte[]         byte[] bytes = new byte[stream.Length];         stream.Read(bytes, 0, bytes.Length);         // 設定目前流的位置為流的開始         stream.Seek(0, SeekOrigin.Begin);         // 把 byte[] 寫入檔案         FileStream fs = new FileStream(fileName, FileMode.Create);         BinaryWriter bw = new BinaryWriter(fs);         bw.Write(bytes);         bw.Close();         fs.Close();     }     // 從檔案讀取Stream     public Stream FileToStream(string fileName)     {                     // 打開檔案         FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);         // 讀取檔案的 byte[]         byte[] bytes = new byte[fileStream.Length];         fileStream.Read(bytes, 0, bytes.Length);         fileStream.Close();         // 把 byte[] 轉換成 Stream         Stream stream = new MemoryStream(bytes);         return stream;     }      

5、Bitmap 轉化為 Byte[]

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