02 Button按钮 - I_love_U
namespace I_love_you
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//--------------------------------------------------------------------------------
// 当鼠标进入按钮的可见部分的时候，给按钮一个新的坐标
private void button2_MouseEnter(object sender, EventArgs e)
{
//给按钮一个新坐标
//这个按钮的最大宽度就是窗体宽度减去按钮的宽度
//int x = this.Width - button1.Width; this.width是固定的
int x = this.ClientSize.Width - button2.Width;
int y = this.ClientSize.Height - button2.Height;
Random r = new Random();//要给按钮一个随机的坐标
//光标移动到Location位置出现提示,如果用Point(x,y)坐标就写死了
button2.Location = new Point(x,y);
//r.Next(0, x)，最大值为x-1
button2.Location = new Point(r.Next(0, x + 1), r.Next(0, y + 1));
}
//--------------------------------------------------------------------------------
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("爱你too");
this.Close();//关闭主窗体
}
}
}
03 Timer控件 - 跑马灯
namespace _03Timer
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//--------------------------------------------------------------------------------
private void timer1_Tick(object sender, EventArgs e)
{ //Substring(1)，从下标1到最后字符的子串
label1.Text=label1.Text.Substring(1) + label1.Text.Substring(0, 1);
}
//--------------------------------------------------------------------------------
// 每隔1秒钟将时间赋值给label2
private void timer2_Tick(object sender, EventArgs e)
{ // DateTime.Now.ToString();获取当前时间
label2.Text = DateTime.Now.ToString();
//先做下面Form1_Load，再做音乐
if(DateTime.Now.Hour==21&&DateTime.Now.Minute==36&&DateTime.Now.Second==10)
{
//播放音乐 ALT+SHIFT+F10 ,自动添加using引用命名空间
SoundPlayer sp = new SoundPlayer();
sp.SoundLocation = @"d:\12 边疆泉水清又纯.WAV";
sp.Play();
}
}
//--------------------------------------------------------------------------------
// 当窗体加载的时候，将当前系统时间赋值给lable2
private void Form1_Load(object sender, EventArgs e)
{
label2.Text = DateTime.Now.ToString();
}
}
}
04 TextBox控件- 简单记事本
大家可以对控件的name属性对控件改名
namespace _04简单记事本
{
public partial class Form1 : Form
{
//--------------------------------------------------------------------------------
public Form1()
{
InitializeComponent();
button3.Visible = false;
button4.Visible = false;
textBox3.Visible = false;
}
//--------------------------------------------------------------------------------
//登录按钮
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "admin" && textBox2.Text == "admin")
{
MessageBox.Show("登录成功！");
button1.Visible = false;
button2.Visible = false;
textBox1.Visible = false;
textBox2.Visible = false;
label1.Visible = false;
label2.Visible = false;
button3.Visible = true;
button4.Visible = true;
textBox3.Visible = true;
}
else
{
MessageBox.Show("登录失败");
//清空文本框
textBox1.Clear();
textBox2.Clear();
//让用户名文本框获得焦点
textBox1.Focus();
}
}
//--------------------------------------------------------------------------------
//重置按钮
private void button2_Click(object sender, EventArgs e)
{
//清空文本框
textBox1.Clear();
textBox2.Clear();
//让用户名文本框获得焦点
textBox1.Focus();
}
//--------------------------------------------------------------------------------
// 自动换行按钮
private void button3_Click(object sender, EventArgs e)
{
//判断当前是否为自动换行，如果是，取消自动换行，如果不是，改成取消自动换行
if(button3.Text=="自动换行")
{
textBox3.WordWrap = true;
button3.Text = "取消自动换行";
}
else if(button3.Text == "取消自动换行")
{
textBox3.WordWrap = false;
button3.Text = "自动换行";
}
}
//--------------------------------------------------------------------------------
//保存按钮
//using System.IO;
private void button4_Click(object sender, EventArgs e)
{
using (FileStream fsWrite = new FileStream(@"C:\Users\cmy\Desktop\123.txt", FileMode.OpenOrCreate, FileAccess.Write))
{
string str = textBox3.Text.Trim();
byte[] buffer = System.Text.Encoding.Default.GetBytes(str);
fsWrite.Write(buffer, 0, buffer.Length);
}
MessageBox.Show("保存成功");
}
}
}
