C# 中将自定义的structure转换为byte[] 及Stream 和 byte[] 之间的转换(文件流的应用)

在Socket编程中经常会碰到将Struct转换为byte数组进行传送的情况. 如果服务器和客户端都是自己开发的话, 用序列化和反序列化当然会比较简单, 但序列化后会数据里会包含一些额外的数据，如：程序集名称、版本、公钥等, 不适用于一端是非托管程序. 在.NET Framework的System.Runtime.InteropServices.Marshal类中包含两个方法可以解决此问题:StructureToPtr 方法: 将数据从托管对象封送到非托管内存块;PtrToStructure 方法: 将数据从非托管内存块封送到托管对象。用以下代码就可以实现struct与byte[]之间的相互转换:

using System.Runtime.InteropServices;

public static byte[]RawSerialize( object anything ){int rawsize= Marshal.SizeOf( anything );IntPtr buffer = Marshal.AllocHGlobal( rawsize);Marshal.StructureToPtr( anything, buffer, false );byte[]rawdatas = new byte[ rawsize ];Marshal.Copy( buffer, rawdatas, 0, rawsize);Marshal.FreeHGlobal( buffer );return rawdatas;}public static object RawDeserialize( byte[]rawdatas, Type anytype ){int rawsize= Marshal.SizeOf( anytype );if(rawsize > rawdatas.Length )return null;IntPtr buffer = Marshal.AllocHGlobal( rawsize);Marshal.Copy( rawdatas, 0, buffer, rawsize);object retobj= Marshal.PtrToStructure( buffer, anytype );Marshal.FreeHGlobal(buffer );return retobj;

}

例子：

 [StructLayout(LayoutKind.Sequential, Pack=1, CharSet=CharSet.Ansi)]            struct YourStruct        {            public Int32  First;            public Int32  Second;            [MarshalAs( UnmanagedType.ByValTStr, SizeConst=16 )]            public String Text;        }         YourStruct st;        st.First  = 11;        st.Second = 22;        st.Text = "Hello";        byte[] rd = RawSerialize( st );        // reverse:        YourStruct rst = (YourStruct) RawDeserialize( rd, typeof(YourStruct));

C#Stream 和 byte[] 之间的转换(文件流的应用)一. 二进制转换成图片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、System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding();　　byte[] inputBytes =converter.GetBytes(inputString);　　string inputString = converter.GetString(inputBytes);2、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/// 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 Streampublic 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 Streampublic 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 StreamStream stream = new MemoryStream(bytes);return stream;}