手写Windows文件路径获取小工具

目的

给Windows右键增加功能，右键任何文件（夹）显示复制文件路径的扩展。

效果展示

实现思路

右键调用，自身会把文件路径传递给被调用文件，被调用文件内只需将路径参数复制到剪贴板即可。

局部关键代码

字符串复制到剪贴板：

static DWORD SetStringToClipboard(LPCWSTR string) {

    int string_length = lstrlen(string);
    int memory_size = (string_length + 1) * sizeof(wchar_t);

    HGLOBAL memory_handle = GlobalAlloc(GMEM_MOVEABLE, memory_size);
    if (memory_handle == NULL) {
        return GetLastError();
    }    

    DWORD error = CopyStringToMemory(string, string_length, memory_handle);
    if (error != ERROR_SUCCESS) {
        GlobalFree(memory_handle);
        return error;
    }

    HANDLE result = SetClipboardData(CF_UNICODETEXT, memory_handle);
    error = GetLastError();
    if (result == NULL) {
        GlobalFree(memory_handle);
        return error;
    }

    return ERROR_SUCCESS;
}

源代码

纯C实现，VS2022 MSVC-64bit 编译

#include <Windows.h>
#include <Shlwapi.h>
#include <strsafe.h>

static DWORD SetStringToClipboard(LPCWSTR string);
static DWORD CopyStringToMemory(LPCWSTR string, int copied_length, HGLOBAL memory_handle);


int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {

    int argument_count = 0;
    LPWSTR* arguments = CommandLineToArgvW(GetCommandLine(), &argument_count);
    if (argument_count < 3) {
        return ERROR_INVALID_PARAMETER;
    }

    BOOL name_only = FALSE;
    if (lstrcmp(arguments[1], L"-n") == 0) {
        name_only = TRUE;
    }
    else if (lstrcmp(arguments[1], L"-p") == 0) {
        name_only = FALSE;
    }
    else {
        return ERROR_INVALID_PARAMETER;
    }

    LPWSTR string_to_set = arguments[2];
    if (name_only) {
        string_to_set = PathFindFileName(string_to_set);
    }

    BOOL is_succeeded = OpenClipboard(NULL);
    if (!is_succeeded) {
        return GetLastError();
    }

    EmptyClipboard();
    DWORD error = SetStringToClipboard(string_to_set);
    CloseClipboard();

    return error;
}


static DWORD SetStringToClipboard(LPCWSTR string) {

    int string_length = lstrlen(string);
    int memory_size = (string_length + 1) * sizeof(wchar_t);

    HGLOBAL memory_handle = GlobalAlloc(GMEM_MOVEABLE, memory_size);
    if (memory_handle == NULL) {
        return GetLastError();
    }    

    DWORD error = CopyStringToMemory(string, string_length, memory_handle);
    if (error != ERROR_SUCCESS) {
        GlobalFree(memory_handle);
        return error;
    }

    HANDLE result = SetClipboardData(CF_UNICODETEXT, memory_handle);
    error = GetLastError();
    if (result == NULL) {
        GlobalFree(memory_handle);
        return error;
    }

    return ERROR_SUCCESS;
}


static DWORD CopyStringToMemory(LPCWSTR string, int copied_length, HGLOBAL memory_handle) {

    LPVOID memory = GlobalLock(memory_handle);
    if (memory == NULL) {
        return GetLastError();
    }

    HRESULT result = StringCchCopy(memory, copied_length + 1, string);
    GlobalUnlock(memory_handle);

    if (FAILED(result)) {
        return ERROR_OUTOFMEMORY;
    }

    return ERROR_SUCCESS;
}

安装与卸载

编译完程序后，需要增加到右键功能栏，即需要修改注册表增加功能。

使用方式：保存为.bat文件后，双击运行。

安装：

这里用bat批处理脚本实现安装：

@echo off

set exe_path="%~dp0Release\CopyPath.exe"

if not exist %exe_path% (
	echo %exe_path% not found. 
	echo Please build the solution with release configuration, 
	echo   or modify this script to point to an existent executable file.
	echo Install failed.
	goto :end
)

set reg_path=HKEY_CURRENT_USER\Software\Classes

reg add %reg_path%\*\shell\CopyPath /f /ve /d "Copy path"
reg add %reg_path%\*\shell\CopyPath\command /f /ve /d "%exe_path% -p \"%%1\""
reg add %reg_path%\*\shell\CopyName /f /ve /d "Copy name"
reg add %reg_path%\*\shell\CopyName\command /f /ve /d "%exe_path% -n \"%%1\""

reg add %reg_path%\Folder\shell\CopyPath /f /ve /d "Copy path"
reg add %reg_path%\Folder\shell\CopyPath\command /f /ve /d "%exe_path% -p \"%%1\""
reg add %reg_path%\Folder\shell\CopyName /f /ve /d "Copy name"
reg add %reg_path%\Folder\shell\CopyName\command /f /ve /d "%exe_path% -n \"%%1\""

echo Install succeeded.

:end
pause

注意：exe_path需要设置为编译后exe所在路径，且运行脚本后，exe不可移动！

卸载：

清理增加的注册表项即可。

@echo off

set reg_path=HKEY_CURRENT_USER\Software\Classes

reg delete %reg_path%\*\shell\CopyPath /f
reg delete %reg_path%\*\shell\CopyName /f

reg delete %reg_path%\Folder\shell\CopyPath /f
reg delete %reg_path%\Folder\shell\CopyName /f

echo Uninstallation completed.