C#中二進制和流之間的各種相互轉換

一. 二進制轉換成圖片間的轉換

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MemoryStream ms = new?MemoryStream(bytes); ms.Position = 0; Image img = Image.FromStream(ms); ms.Close(); this.pictureBox1.Image

二. C#中byte[]與string的轉換代碼

1.

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System.Text.UnicodeEncoding converter = new?System.Text.UnicodeEncoding(); 　　byte[] inputBytes =converter.GetBytes(inputString); 　　string?inputString = converter.GetString(inputBytes);

2.

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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[] 之間的轉換

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

四. Stream 和 文件之間的轉換

將 Stream 寫入文件

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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); ????// 設置當前流的位置為流的開始 ????stream.Seek(0, SeekOrigin.Begin); ????// 把 byte[] 寫入文件 ????FileStream fs = new?FileStream(fileName, FileMode.Create); ????BinaryWriter bw = new?BinaryWriter(fs); ????bw.Write(bytes); ????bw.Close(); ????fs.Close(); }

五. 從文件讀取 Stream

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public?Stream FileToStream(string?fileName) {???????????? ????// 打開文件 ????FileStream fileStream = new?FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); ????// 讀取文件的 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; ?? ?? }

六Bitmap 轉化為 Byte[]?

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//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();