C#編程基礎 實驗（8） (4)__編程

設計表單。要求：表單標題為“我的文字框實驗”;表單上一個標籤；表單中有一個文字框，文字框中只能輸入0~9十種數字，最多輸入8個字元。單擊“結束”按鈕程式即可結束。

代碼如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Windows.Forms;namespace WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            this.Text = "我的文字框實驗";            button1.Text = "結束";        }        private void label1_Click(object sender, EventArgs e)        {            label1.Text = "下面文字框只能輸入0至9十種數字，且長度最多8個";        }        private void button1_Click(object sender, EventArgs e)        {            this.Close();        }        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar < '0' || e.KeyChar > '9')            {                e.Handled = true;            }            textBox1.MaxLength = 8;        }        private void textBox1_TextChanged(object sender, EventArgs e)        {        }    }}