C＃（二十八）之C＃鼠标事件、键盘事件

今天看下鼠标事件、键盘事件。

1：鼠标事件分为两种：

EventArgs：MouseEnter/MouseLeave 等

MouseEventArgs：MouseDoubleClick、MouseDown、MouseUp、MouseHover、MouseMove。

private void button1_MouseEnter(object sender, EventArgs e)
        {
            label1.Text = "按钮进入事件";
        }
 
        private void button1_MouseLeave(object sender, EventArgs e)
        {
            label1.Text = "按钮离开事件";
        }
 
        private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            label2.Text = "双击窗体事件";
        }
 
        private void button2_MouseDown(object sender, MouseEventArgs e)
        {
            label2.Text = "按下按钮2";
        }
 
        private void button2_MouseUp(object sender, MouseEventArgs e)
        {
            label2.Text = "松开按钮2";
        }
 
        private void button2_MouseHover(object sender, EventArgs e)
        {
            label3.Text = "鼠标在按钮2上停留了一段时间";
        }
 
        private void button2_MouseMove(object sender, MouseEventArgs e)
        {
            label4.Text = "鼠标在按钮2上经过";
        }

2：键盘事件

KeyEventArgs：

KeyPressEventArgs：

KeyPress：必须是焦点在控件上时才好用。（按下并松开发生）

KeyDown：是在按下按键时发生

KeyUp：是在抬起按键时发生

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
        {
            label1.Text += e.KeyChar;
        }

键盘事件与鼠标事件类似，这里只是看了一部分概念，相关案例以后遇到再补充。

测试使用代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace mianbanGc
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_MouseEnter(object sender, EventArgs e)
        {
            label1.Text = "按钮进入事件";
        }
 
        private void button1_MouseLeave(object sender, EventArgs e)
        {
            label1.Text = "按钮离开事件";
        }
 
        private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            label2.Text = "双击窗体事件";
        }
 
        private void button2_MouseDown(object sender, MouseEventArgs e)
        {
            label2.Text = "按下按钮2";
        }
 
        private void button2_MouseUp(object sender, MouseEventArgs e)
        {
            label2.Text = "松开按钮2";
        }
 
        private void button2_MouseHover(object sender, EventArgs e)
        {
            label3.Text = "鼠标在按钮2上停留了一段时间";
        }
 
        private void button2_MouseMove(object sender, MouseEventArgs e)
        {
            label4.Text = "鼠标在按钮2上经过";
        }
 
        public string str = "";
        private void Form1_KeyPress(object sender, KeyPressEventArgs e)
        {
            str += e.KeyChar;
            label5.Text += e.KeyChar;
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
 
        private void label5_Click(object sender, EventArgs e)
        {
 
        }
    }
}

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