C# Net/Win32 内存操作

最新推荐文章于 2025-05-19 21:56:02 发布

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最新推荐文章于 2025-05-19 21:56:02 发布 · 1k 阅读

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CC 4.0 BY-SA版权

这篇博客介绍了C#中进行内存操作的方法，包括LocalAlloc、GlobalAlloc和VirtualAlloc三种分配内存的方式。同时，文章提醒在使用这些方法时需要注意不能读写对象类型，并且不应在Net 4.5环境下操作Net Byte[]。此外，还提到了SetProcessWorkingSetSize函数用于内存优化，但过度优化可能导致系统将物理内存转移到虚拟内存，反而使性能下降。

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使用方法：

结果如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace std
{
    public partial class Memory : Object
    {

        [DllImportAttribute("kernel32.dll", EntryPoint = "WriteProcessMemory")]
        [return: MarshalAsAttribute(UnmanagedType.Bool)]
        static extern bool WriteProcessMemory(
            [InAttribute()] IntPtr hProcess,
            [InAttribute()] IntPtr lpBaseAddress,
            [InAttribute()] byte[] lpBuffer,
            int nSize,
            IntPtr lpNumberOfBytesWritten
            );

        [DllImportAttribute("kernel32.dll", EntryPoint = "ReadProcessMemory")]
        [return: MarshalAsAttribute(UnmanagedType.Bool)]
        static extern bool ReadProcessMemory(
            [InAttribute()] IntPtr hProcess,
            [InAttribute()] IntPtr lpBaseAddress,
            [InAttribute()] IntPtr lpBuffer,
            uint nSize,
            IntPtr lpNumberOfBytesRead
            );

        [DllImportAttribute("kernel32.dll", EntryPoint = "OpenProcess")]
        static extern IntPtr OpenProcess(
            uint dwDesiredAccess,
            [MarshalAsAttribute(UnmanagedType.Bool)] bool bInheritHandle,
            uint dwProcessId
            );

        [DllImportAttribute("kernel32.dll", EntryPoint = "GetCurrentProcessId")]
        static extern uint GetCurrentProcessId();

        [DllImportAttribute("kernel32.dll", EntryPoint = "CloseHandle")]
        [return: MarshalAsAttribute(UnmanagedType.Bool)]
        static extern bool CloseHandle(
            [InAttribute()] IntPtr hObject
            );


        [DllImportAttribute("ntdll.dll", EntryPoint = "RtlCopyMemory")]
        static extern uint RtlCompareMemory(  
            [InAttribute()] IntPtr Source1,
            [InAttribute()] IntPtr Source2,
            uint Length
            );

        [DllImportAttribute("Psapi.dll", EntryPoint = "GetModuleFileNameEx")]
        static extern uint GetModuleFileNameExA(
            [InAttribute()] IntPtr hProcess,
            [InAttribute()] IntPtr hModule, 
            [OutAttribute(), MarshalAsAttribute(UnmanagedType.LPStr)] StringBuilder lpFilename,
            [InAttribute()] uint nSize
                    );

        [DllImpo