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C mouse event and keyboard event of C (XXVIII)
2022-07-06 03:47:00 【camellias_】
Look at the mouse event today 、 Keyboard events .
1: There are two kinds of mouse events :
EventArgs:MouseEnter/MouseLeave etc.
MouseEventArgs:MouseDoubleClick、MouseDown、MouseUp、MouseHover、MouseMove.
private void button1_MouseEnter(object sender, EventArgs e)
{
label1.Text = " Button entry event ";
}
private void button1_MouseLeave(object sender, EventArgs e)
{
label1.Text = " Button leave event ";
}
private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
{
label2.Text = " Double click the form event ";
}
private void button2_MouseDown(object sender, MouseEventArgs e)
{
label2.Text = " Press the button 2";
}
private void button2_MouseUp(object sender, MouseEventArgs e)
{
label2.Text = " Release the button 2";
}
private void button2_MouseHover(object sender, EventArgs e)
{
label3.Text = " Mouse on button 2 Stayed on for some time ";
}
private void button2_MouseMove(object sender, MouseEventArgs e)
{
label4.Text = " Mouse on button 2 Go through ";
}
2: Keyboard events
KeyEventArgs:
KeyPressEventArgs:
KeyPress: It can only be used when the focus is on the control .( Press and release to happen )
KeyDown: Occurs when the key is pressed
KeyUp: It happens when you lift the key
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
label1.Text += e.KeyChar;
}
Keyboard events are similar to mouse events , Here are just some concepts , Relevant cases will be added later .
Test using code :
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 = " Button entry event ";
}
private void button1_MouseLeave(object sender, EventArgs e)
{
label1.Text = " Button leave event ";
}
private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
{
label2.Text = " Double click the form event ";
}
private void button2_MouseDown(object sender, MouseEventArgs e)
{
label2.Text = " Press the button 2";
}
private void button2_MouseUp(object sender, MouseEventArgs e)
{
label2.Text = " Release the button 2";
}
private void button2_MouseHover(object sender, EventArgs e)
{
label3.Text = " Mouse on button 2 Stayed on for some time ";
}
private void button2_MouseMove(object sender, MouseEventArgs e)
{
label4.Text = " Mouse on button 2 Go through ";
}
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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