设计一个简单的windows应用程序，在文本框中随意输入一个日期，单击“确定”按钮时显示这一天是星期几

示例：

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 test

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

enum WeekDay { 星期天,星期一,星期二,星期三,星期四,星期五,星期六};

private void button1_Click(object sender, EventArgs e)

{

DateTime dt = Convert .ToDateTime ( textBox1 .Text);

label1.Text = "\n这一天是" + dt.DayOfWeek;

WeekDay wd =(WeekDay ) dt.DayOfWeek;

label1.Text+= "（即′："+wd +")";

}

}

}

扩展资料

设计一个简单的Windows程序，输入5个数字，然后排序并输出；

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 bb

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

int[]a=new int[5];

int i = 0;

private void button1_Click(object sender, EventArgs e)

{

if (i < 5)

{

a[i] = Convert.ToInt32(textBox1.Text);

label2.Text += Convert .ToString( a[i])+"  ";

i++;

textBox1.Text = "";

}

}

private void Form1_Load(object sender, EventArgs e)

{

label2.Text = "排序前的数字序列：";

}

private void button2_Click(object sender, EventArgs e)

{

Array.Sort(a);

label2.Text += "\n排序后的数字序列："+a[0]+" "+a[1]+" "+a[2]+" "+a[3]+" "+a[4];

}

}

}