字节数组byte[]与图片image之间的转化

字节数组转换成图片

public static Image byte2img(byte[] buffer)
{MemoryStream ms = new MemoryStream(buffer);ms.Position = 0;Image img = Image.FromStream(ms);ms.Close();return img;
}

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图片转化为字节数组

public static byte[] byte2img(Bitmap Bit)
{byte[] back = null;MemoryStream ms = new MemoryStream();Bit.Save(ms, System.Drawing.Imaging.ImageFormat.Png);back = ms.GetBuffer();return back;
}

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字节数组byte[]与字符串string之间的编码解码

字符串到字节数组的编码

public static byte[] str2byte(string str)
{byte[] data = System.Text.Encoding.UTF8.GetBytes(param);//byte[] data = Convert.FromBase64String(param);//有很多种编码方式，可参考:http://blog.csdn.net/luanpeng825485697/article/details/77622243return data;
}

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字节数组到字符串的解码

public static string str2byte(byte[] data)
{string str = System.Text.Encoding.UTF8.GetString(data);//str = Convert.ToBase64String(data);//有很多种编码方式，可参考:http://blog.csdn.net/luanpeng825485697/article/details/77622243return str;
}

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字节数组byte[]与内存流MemoryStream之间的转换

字节数组转化为输入内存流

public static MemoryStream byte2stream(byte[] data)
{MemoryStream inputStream = new MemoryStream(data);return inputStream;
}

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输出内存流转化为字节数组

public static byte[] byte2stream(MemoryStream outStream)
{return outStream.ToArray();
}

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字节数组byte[]与流stream之间的转换

将 Stream 转成 byte[]

public byte[] stream2byte(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;
}

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将 byte[] 转成 Stream

public Stream byte2stream(byte[] bytes)
{Stream stream = new MemoryStream(bytes);return stream;
}

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流Stream 和 文件file之间的转换

将 Stream 写入文件

public void stream2file(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();
}

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从文件读取 Stream

public Stream file2stream(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 StreamStream stream = new MemoryStream(bytes);return stream;
}

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