类型转换

一. 二进制转换成图片

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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[]与string的转换代码

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[] 之间的转换

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/// 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

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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

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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

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//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();