请问c#如何处理键盘的“上/下/左/右”事件？

corn8888 2009-06-02 08:11:57

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zhangshuqiang123 2012-08-27

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为什么我窗体KeyPreview 设置为 true 了，添加了KeyDown事件，按下键盘按钮，还是没有反应.

zhangshuqiang123 2012-08-27

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为什么我窗体KeyPreview 设置为 true 了，按下鼠标，还是没有反应.

ijlwtjxx 2010-03-04

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

namespace WindowsFormsApplication12
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
string keyCode = e.KeyCode.ToString();
switch (e.KeyData)
{
case Keys.Up:
this.Text = keyCode;
break;
case Keys.Down:
this.Text = keyCode;
break;
case Keys.Left:
this.Text = keyCode;
break;
case Keys.Right:
this.Text = keyCode;
break;
}
}
}
}

寻找彩虹 2010-01-16

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学习了~~~

xp1056 2009-06-05

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mark

corn8888 2009-06-05

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study

jwangyx 2009-06-05

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生成事件加代码
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Up)
MessageBox.Show("上");
if (e.KeyCode == Keys.Down)
MessageBox.Show("下");
if (e.KeyCode == Keys.Left)
MessageBox.Show("左");
if (e.KeyCode == Keys.Right)
MessageBox.Show("右");
}

zenowolf 2009-06-05

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keydown or keypress 时间里
判断
keys.Up
keys.Down
Keys.Left
Keys.Right

手抓饼加辣 2009-06-05

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学习

corn8888 2009-06-05

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100

wzuomin 2009-06-05

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学习学习

这个推荐的帖子快过百了呀，呵呵。

qiqundelang 2009-06-05

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hx_huang 2009-06-05

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private void Form_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyValue == 37)
MessageBox.Show("←");
if(e.KeyValue==38)
MessageBox.Show("↑");
if(e.KeyValue==39)
MessageBox.Show("→");
if(e.KeyValue==40)
MessageBox.Show("↓");
}

济南大飞哥 2009-06-05

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mark

wenjie0728 2009-06-04

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好贴学习了

Maxlusune 2009-06-04

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使用js
<script type="text/javascript">
window.document.attachEvent("onkeydown", function() {
var a = document.activeElement;
var boxname;
//debugger;
if (a.nodeName == "SELECT" || a.nodeName == "INPUT") {
boxname = a.name.substring(a.name.lastIndexOf("$") + 1);
}
var nextboxname;
if (event.keyCode == 13 && event.srcElement.type != 'button' && event.srcElement.type != 'submit' && event.srcElement.type != 'reset' && event.srcElement.type != '' && event.srcElement.type != 'textarea') {
window.event.keyCode = 9;
}

switch (boxname) {
case "tbLineName": switch (event.keyCode) {
case 37: //left
break;
case 38: //up
break;
case 39: //right
nextboxname = document.getElementById("<%=tbVehName.ClientID %>"); nextboxname.focus(); break;
case 40: //down
nextboxname = document.getElementById("<%=tbCYear.ClientID %>"); nextboxname.focus(); break;

}
break;

case "tbComplainContent": switch (event.keyCode) {
case 37: //left
nextboxname = document.getElementById("<%=ddlType.ClientID %>"); nextboxname.focus(); break;
case 38: //up
break;
case 39: //right
nextboxname = document.getElementById("<%=ddlType.ClientID %>"); nextboxname.focus(); break;
case 40: //down
break;

}
break;
}

});
</script>

lao_bulls 2009-06-04