标签：style blog http color io os ar for sp
值得说的就是添加一个回车事件，
http://blog.csdn.net/nanwang314/article/details/6176604
private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(e.KeyCode==Keys.Enter)
{
MessageBox.Show("您在textBox1里按下了回车键");
}
}
这个样子就可以添加一个回车事件…………
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 CircleAreaW { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { double r; r = double.Parse(txtR.Text); MyCircle aCircle = new MyCircle(r); double aArea = aCircle.CircleArea(); dblArea.Text = aArea.ToString("f4"); } private void txtR_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Enter) { MessageBox.Show("您在textBox1里按下了回车键"); double r; r = double.Parse(txtR.Text); MyCircle aCircle = new MyCircle(r); double aArea = aCircle.CircleArea(); dblArea.Text = aArea.ToString("f4"); } } } }
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CircleAreaW { class MyCircle { double circleR; public MyCircle(double dblR) { circleR = dblR; } public double CircleArea() { double dblArea = Math.PI * circleR * circleR; return dblArea; } } }
标签：style blog http color io os ar for sp
原文地址：http://www.cnblogs.com/ccccnzb/p/4014718.html
