问下win10任务管理器中的磁盘利用率和网络利用率用VC怎么获取？

wuxiao0313 2023-05-23 14:04:45

就是图片上的磁盘和网络的利用率

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coder2038 2023-05-24

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要获取进程的磁盘利用率和网络利用率，您需要使用Windows Performance Counter API。以下是一些示例代码：

#include <windows.h>
#include <pdh.h>
#include <pdhmsg.h>

#pragma comment(lib, "pdh.lib")

// 获取进程的磁盘利用率
double GetProcessDiskUsage(DWORD processId)
{
    PDH_HQUERY query;
    PDH_HCOUNTER counter;
    PDH_STATUS status;
    WCHAR path[MAX_PATH];
    WCHAR counterName[MAX_PATH];
    DWORD bufSize = MAX_PATH;

    // 构造计数器路径
    swprintf_s(path, MAX_PATH, L"\\Process(%u)\\IO Data Bytes/sec", processId);

    // 打开查询
    status = PdhOpenQuery(NULL, 0, &query);
    if (status != ERROR_SUCCESS) {
        return -1.0;
    }

    // 添加计数器
    status = PdhAddCounter(query, path, 0, &counter);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 收集计数器数据
    status = PdhCollectQueryData(query);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 获取计数器值
    PDH_FMT_COUNTERVALUE value;
    status = PdhGetFormattedCounterValue(counter, PDH_FMT_DOUBLE, NULL, &value);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 关闭查询
    PdhCloseQuery(query);

    // 返回计数器值
    return value.doubleValue;
}

// 获取进程的网络利用率
double GetProcessNetworkUsage(DWORD processId)
{
    PDH_HQUERY query;
    PDH_HCOUNTER counter;
    PDH_STATUS status;
    WCHAR path[MAX_PATH];
    WCHAR counterName[MAX_PATH];
    DWORD bufSize = MAX_PATH;

    // 构造计数器路径
    swprintf_s(path, MAX_PATH, L"\\Process(%u)\\IO Other Bytes/sec", processId);

    // 打开查询
    status = PdhOpenQuery(NULL, 0, &query);
    if (status != ERROR_SUCCESS) {
        return -1.0;
    }

    // 添加计数器
    status = PdhAddCounter(query, path, 0, &counter);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 收集计数器数据
    status = PdhCollectQueryData(query);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 获取计数器值
    PDH_FMT_COUNTERVALUE value;
    status = PdhGetFormattedCounterValue(counter, PDH_FMT_DOUBLE, NULL, &value);
    if (status != ERROR_SUCCESS) {
        PdhCloseQuery(query);
        return -1.0;
    }

    // 关闭查询
    PdhCloseQuery(query);

    // 返回计数器值
    return value.doubleValue;
}