C#自学之路30

30.鼠标处理事件和键盘处理事件

  鼠标相关的事件大致有6中，MouseHover，MouseLeave，MouseEnter，MouseMove，MouseDown，MouseUp。

键盘相关的事件有3种，KeyDown，KeyUp，KeyPress。

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 WindowsFormsApplication15

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_MouseMove(object sender, MouseEventArgs e)

{

this.textBox1.Text = Convert.ToString( e.X );

this.textBox2.Text = Convert.ToString( e.Y );

}

private void Form1_MouseDown(object sender, MouseEventArgs e)

{

if ( e.Button == MouseButtons.Left )

MessageBox.Show( "左键" );

if ( e.Button == MouseButtons.Middle )

MessageBox.Show( "中键" );

if ( e.Button == MouseButtons.Right )

MessageBox.Show( "右键" );

}

private void Form1_KeyDown(object sender, KeyEventArgs e)

{

//           MessageBox.Show( "你所按的键为：" + e.KeyCode.ToString() );

}

}

}

看下键盘的事件。

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 WindowsFormsApplication16

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)

{

if (e.KeyChar != 8 && e.KeyChar != 13 && !char.IsDigit(e.KeyChar))

{

MessageBox.Show( "只能输入数字！！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information  );

e.Handled = true;

}

}

}

}