using System.IO; using System.Runtime.InteropServices; using System; //1. 把檔案讀成 Byte 形式 private byte[] readFile(string strFileName) { byte[] buffer = null; FileStream fs = new FileStream(strFileName, FileMode.Open, FileAccess.Read); try { BinaryReader br = new BinaryReader(fs); int len = System.Convert.ToInt32(fs.Length); buffer = br.ReadBytes(len); } finally { fs.Close(); } return buffer; } //2. struct 轉成 byte static byte[] StructToBytes(object structObj) { int size = Marshal.SizeOf(structObj); IntPtr buffer = Marshal.AllocHGlobal(size); try { Marshal.StructureToPtr(structObj, buffer, false); byte[] bytes = new byte[size]; Marshal.Copy(buffer, bytes, 0, size); return bytes; } finally { Marshal.FreeHGlobal(buffer); } } //3. byte 轉成 struct static object BytesToStruct(byte[] bytes, Type strcutType) { int size = Marshal.SizeOf(strcutType); IntPtr buffer = Marshal.AllocHGlobal(size); try { Marshal.Copy(bytes, 0, buffer, size); return Marshal.PtrToStructure(buffer, strcutType); } finally { Marshal.FreeHGlobal(buffer); } }
2010-09-03
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