86 lines
2.4 KiB
C#
86 lines
2.4 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Runtime.InteropServices;
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namespace Common
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{
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public sealed class StructConverter
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{
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public static int SizeOf(object structObj)
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{
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unsafe { return Marshal.SizeOf(structObj); }
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}
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public static int SizeOf(Type type)
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{
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return Marshal.SizeOf(type);
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}
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public static int SizeOf<T>()
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{
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return Marshal.SizeOf(typeof(T));
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}
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/// <summary>
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/// 结构体转成字节数组
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/// </summary>
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/// <param name="structObj"></param>
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/// <returns></returns>
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public static byte[] StructToBytes(object structObj)
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{
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int size = SizeOf(structObj);
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byte[] bytes = new byte[size];
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IntPtr structPtr = Marshal.AllocHGlobal(size);
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try
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{
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Marshal.StructureToPtr(structObj, structPtr, false);
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Marshal.Copy(structPtr, bytes, 0, size);
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}
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finally
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{
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Marshal.FreeHGlobal(structPtr);
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}
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return bytes;
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}
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/// <summary>
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/// 字节数组转成结构体
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/// </summary>
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/// <param name="bytes"></param>
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/// <param name="type"></param>
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/// <returns></returns>
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public static object BytesToStruct(byte[] bytes, Type type)
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{
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return BytesToStruct(bytes, 0, type);
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}
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/// <summary>
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/// 字节数组转成结构体
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/// </summary>
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/// <param name="bytes"></param>
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/// <param name="startIndex"></param>
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/// <param name="type"></param>
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/// <returns></returns>
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public static object BytesToStruct(byte[] bytes, int startIndex, Type type)
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{
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object structObj = null;
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int size = Marshal.SizeOf(type);
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if (startIndex < 0 || startIndex >= bytes.Length || size > bytes.Length)
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{
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return null;
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}
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IntPtr structPtr = Marshal.AllocHGlobal(size);
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try
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{
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Marshal.Copy(bytes, startIndex, structPtr, size);
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structObj = Marshal.PtrToStructure(structPtr, type);
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}
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finally
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{
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Marshal.FreeHGlobal(structPtr);
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}
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return structObj;
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}
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}
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}
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