C++获取Windows特定进程网络收发速率

这篇文章将介绍如何使用C++编写Windows程序，以获取特定进程的网络收发流量速率。

代码示例

以下是一个使用C++编写的Windows程序，用于获取特定进程的网络收发流量速率：

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

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

DWORD GetProcessNetworkUsage(DWORD processId, ULONGLONG& sentBytes, ULONGLONG& receivedBytes)
{
    PDH_STATUS status;
    PDH_FMT_COUNTERVALUE counterValue;

    HQUERY query;
    status = PdhOpenQuery(NULL, 0, &query);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhOpenQuery failed with status ' << status << std::endl;
        return status;
    }

    PDH_HCOUNTER sentCounter, receivedCounter;
    std::string sentCounterPath = '\\Process(' + std::to_string(processId) + ')\\IO Other Bytes/sec';
    std::string receivedCounterPath = '\\Process(' + std::to_string(processId) + ')\\IO Other Bytes/sec';

    status = PdhAddCounter(query, sentCounterPath.c_str(), 0, &sentCounter);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhAddCounter for sent bytes failed with status ' << status << std::endl;
        return status;
    }

    status = PdhAddCounter(query, receivedCounterPath.c_str(), 0, &receivedCounter);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhAddCounter for received bytes failed with status ' << status << std::endl;
        return status;
    }

    status = PdhCollectQueryData(query);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhCollectQueryData failed with status ' << status << std::endl;
        return status;
    }

    Sleep(1000); // Wait for 1 second to collect data

    status = PdhCollectQueryData(query);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhCollectQueryData failed with status ' << status << std::endl;
        return status;
    }

    status = PdhGetFormattedCounterValue(sentCounter, PDH_FMT_LARGE, NULL, &counterValue);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhGetFormattedCounterValue for sent bytes failed with status ' << status << std::endl;
        return status;
    }
    sentBytes = counterValue.largeValue;

    status = PdhGetFormattedCounterValue(receivedCounter, PDH_FMT_LARGE, NULL, &counterValue);
    if (status != ERROR_SUCCESS) {
        std::cout << 'PdhGetFormattedCounterValue for received bytes failed with status ' << status << std::endl;
        return status;
    }
    receivedBytes = counterValue.largeValue;

    PdhCloseQuery(query);

    return ERROR_SUCCESS;
}

int main()
{
    DWORD processId = 1234; // Replace with the actual process ID
    ULONGLONG sentBytes, receivedBytes;

    DWORD status = GetProcessNetworkUsage(processId, sentBytes, receivedBytes);
    if (status == ERROR_SUCCESS) {
        std::cout << 'Sent bytes: ' << sentBytes << std::endl;
        std::cout << 'Received bytes: ' << receivedBytes << std::endl;
    }

    return 0;
}

解释

引入头文件: 代码首先引入了必要的头文件，包括<iostream>, <windows.h>, <pdh.h>, <pdhmsg.h>。
链接库: 使用#pragma comment(lib, 'pdh.lib')链接PDH库。
GetProcessNetworkUsage函数:
- 该函数接受进程ID、发送字节数和接收字节数作为参数。
- 使用PDH API打开查询、添加计数器（用于监控发送和接收的字节数）、收集数据并获取格式化的计数器值。
- 最后，关闭查询并返回状态码。
main函数:
- 设置目标进程的ID。
- 调用GetProcessNetworkUsage函数获取网络使用情况。
- 打印发送和接收的字节数。

使用方法

将代码保存为.cpp文件。
使用C++编译器编译代码。
将processId替换为您要监控的进程的实际ID。
运行程序，它将在控制台中打印进程的网络收发字节数。

注意事项

该代码使用Windows特有的API，因此只能在Windows操作系统上运行。
您需要将processId替换为您要监控的进程的实际ID。
该代码获取的是每秒的网络收发字节数，您可以根据需要修改代码以获取其他时间间隔的数据。

希望这篇文章能帮助您理解如何使用C++获取Windows特定进程的网络收发流量。如果您有任何问题，请随时提出。