button的触发事件Key_Down和KeyPress出现有关问题

button的触发事件Key_Down和KeyPress出现问题

这三个是效果图
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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
bool flag = false;
public Form1()
{
InitializeComponent();
button1.KeyPress+=new KeyPressEventHandler(button_KeyPress);
button2.KeyPress+=new KeyPressEventHandler(button_KeyPress);
}

private void button1_Click(object sender, EventArgs e)
{
if (flag == false)
{
label1.Text = "Good Night";
}

}

private void button2_Click(object sender, EventArgs e)
{
if (flag == false)
{
label1.Text = "Good Afternoon";
}
}
private void button_KeyPress(object sender,KeyPressEventArgs e)
{
flag = false;
if (32 == e.KeyChar)

{
flag = true;
}
}
}
}
这个是源码 button
[解决办法]


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 Button的空格回车响应
{
    public partial class FormMain : Form
    {
        public FormMain()
        {
            InitializeComponent();
        }

        private void btn_Night_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
            {
                this.label1.Text = "Night:按下空格";
                //e.Handled = true; //再此时按下回车无效
                //e.Handled = false; //再此时按下回车无效
                //e.SuppressKeyPress = true;
            }
             if (e.KeyCode == Keys.Enter)
            { 
 
                this.label1.Text = "Night:按下回车";
                //MessageBox.Show("回车");
                //e.Handled = true;
            }
            else
            {
                this.label1.Text = "？？？？";
            }
           
        }

        private void btn_Night_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
            {
                this.label1.Text = "Up_空格";
                //e.Handled = true;
            }
            else if (e.KeyCode == Keys.Enter)
            {
                this.label1.Text = "Up_回车";
                //e.Handled = true;
            }
        }

        private void btn_Night_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 32)
            {
                this.label1.Text = "Press_空格";
            }
            else if (e.KeyChar == 44) 
 
            {
                this.label1.Text = "Press_回车";
            }
        }
    }
}

在KeyDown和KeyPress 中没有截获回车，KeyUp中都截获了
[解决办法]

引用:

那两个属性不好意思还是没懂，希望能讲清楚或者给个例子，谢谢。。
至于回车这个问题，我刚试过了，按回车不触发down和press事件，不知道为什么，只触发up貌似。

看19楼。
[解决办法]

引用:

若要仅在窗体级别处理键盘事件而不允许其他控件接收键盘事件，请将窗体的 KeyPress 事件处理方法中的 KeyPressEventArgs.Handled 属性设置为 true。
这句话真心看不懂


  private void FormMain_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 32)
            {
                this.Text = "窗口KeyPress 空格";
                e.Handled = false;
            }
        }

看这段，窗口响应 KeyPress事件处理， e.Handled = false，按键消息会传递给button继续处理，如果设置为true，则消息不会在传递给button的KeyPress处理了。
[解决办法]
确实有点蛋疼，回车键无法被keypress获取响应到，试了下只有keyup事件是能够响应到回车事件的
要不就这样，多绑定一个KEYUP的？


        public Form1()
        {
            InitializeComponent();
            button1.KeyUp += new KeyEventHandler(button_KeyUp);
            button2.KeyUp += new KeyEventHandler(button_KeyUp);
            button1.KeyPress += new KeyPressEventHandler(button_KeyPress);
            button2.KeyPress += new KeyPressEventHandler(button_KeyPress); 
 
        }

        private void button_KeyUp(object sender, KeyEventArgs e)
        {
            flag = false;
            if (32 == e.KeyValue)
            {
                
                flag = true;
            }
            else
            {
                label2.Text = e.KeyValue.ToString();
            }


        }

button的触发事件Key_Down和KeyPress出

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