C# .NET中如何使用GetCursorPos函数

标签： getcursorpos 鼠标 编程 屏幕取词 it

分类： 编程技法

5月22日

用Mouse_event（）来控制鼠标操作

在自动化测试的开发中，有一些控件的ID是很难找到的，所以有些时候，我们直接设置鼠标的位置，然后是用click事件，会收到很好的效果。在Windows API中有个mouse_event函数为我们准备好了这一切。

这个函数在user32.dll这个库文件里面。我们可以在C:/WINDOWS/system32（XP系统）这个目录下找到这个文件，他是系统自带的。 我们以C#直接调用这个文件中的API为例子来说下怎么进行鼠标操作，首先在我们C#中声明引用，如果是一个基于From的程序，这个声明的位置写在你的From class就可以了 
[System.Runtime.InteropServices.DllImport("user32")] 
private static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

参数 意义 
dwFlags Long，下表中标志之一或它们的组合 
dx，dy Long，根据MOUSEEVENTF_ABSOLUTE标志，指定x，y方向的绝对位置或相对位置 
cButtons Long，没有使用 
dwExtraInfo Long，没有使用

dwFlags常数 意义

const int MOUSEEVENTF_MOVE = 0x0001;      移动鼠标 
const int MOUSEEVENTF_LEFTDOWN = 0x0002; 模拟鼠标左键按下 
const int MOUSEEVENTF_LEFTUP = 0x0004; 模拟鼠标左键抬起 
const int MOUSEEVENTF_RIGHTDOWN = 0x0008; 模拟鼠标右键按下 
const int MOUSEEVENTF_RIGHTUP = 0x0010; 模拟鼠标右键抬起 
const int MOUSEEVENTF_MIDDLEDOWN = 0x0020; 模拟鼠标中键按下 
const int MOUSEEVENTF_MIDDLEUP = 0x0040; 模拟鼠标中键抬起 
const int MOUSEEVENTF_ABSOLUTE = 0x8000; 标示是否采用绝对坐标

 

程序中我们直接调用mouse_event函数就可以了 
mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, 500, 500, 0, 0);

1、这里是鼠标左键按下和松开两个事件的组合即一次单击： 
mouse_event (MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0 )

2、模拟鼠标右键单击事件： 
mouse_event (MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, 0, 0, 0, 0 )

3、两次连续的鼠标左键单击事件 构成一次鼠标双击事件： 
mouse_event (MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0 )
mouse_event (MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0 )

4、使用绝对坐标 
MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, 500, 500, 0, 0

需要说明的是，如果没有使用MOUSEEVENTF_ABSOLUTE，函数默认的是相对于鼠标当前位置的点，如果dx，和dy，用0，0表示，这函数认为是当前鼠标所在的点。５、直接设定绝对坐标并单击
mouse_event(MOUSEEVENTF_LEFTDOWN, X * 65536 / 1024, Y * 65536 / 768, 0, 0); 
mouse_event(MOUSEEVENTF_LEFTUP, X * 65536 / 1024, Y * 65536 / 768, 0, 0); 
其中X，Y分别是你要点击的点的横坐标和纵坐标

C# .NET中如何使用GetCursorPos函数 例程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace CursorPosition
{
    public partial class frmMain : Form
    {
        // We need to use unmanaged code
        [DllImport("user32.dll")]
        // GetCursorPos() makes everything possible
        static extern bool GetCursorPos(ref Point lpPoint);
        // Variable we will need to count the traveled pixels
        static protected long totalPixels = 0;
        static protected int currX;
        static protected int currY;
        static protected int diffX;
        static protected int diffY;

        public frmMain()
        {
            InitializeComponent();
        }

        private void tmrDef_Tick(object sender, EventArgs e)
        {
            // New point that will be updated by the function with the current coordinates
            Point defPnt = new Point();
            // Call the function and pass the Point, defPnt
            GetCursorPos(ref defPnt);
            // Now after calling the function, defPnt contains the coordinates which we can read
            lblCoordX.Text = "X = " + defPnt.X.ToString();
            lblCoordY.Text = "Y = " + defPnt.Y.ToString();
            // If the cursor has moved at all
            if (diffX != defPnt.X | diffY != defPnt.Y)
            {
                // Calculate the distance of movement (in both vertical and horizontal movement)
                diffX = (defPnt.X - currX);
                diffY = (defPnt.Y - currY);
                // The difference will be negative if the cursor was moved left or up
                // and if it is so, make the number positive
                if (diffX < 0)
                {
                    diffX *= -1;
                }
                if (diffY < 0)
                {
                    diffY *= -1;
                }
                // Add to the "pixels traveled" counter
                totalPixels += diffX + diffY;
                // And display inside a label
                lblTravel.Text = "You have traveled " + totalPixels + " pixels";
            }
            // We need this to see the difference of pixels between two mouse movements
            currX = defPnt.X;
            currY = defPnt.Y;
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            totalPixels = 0;
        }
    }
}