实验-三-基本控件使

1、实验 三 基本控件使用一、实验目的1. 掌握基本控件的重要属性、事件。2. 熟练掌握在窗体上建立上述控件的操作方法。3. 熟练掌握事件过程代码的编写。4. 初步掌握建立基于图形界面的应用程序的过程。二、实验要求1. 做好实验预习，掌握，并熟悉本实验中所使用的相应的控件。2. 写出实验报告，内容是：1) 程序的界面设计。2) 程序主要代码。3) 运行结果。4)实验总结。三、实验内容3.1题目：设计一密码修改程序，要求：1） 当单击“确定”按钮后，首先比较“用户名”和“原密码”是否一致，若一致且都为“admin”，则继续执行步骤2；否则弹出消息框，提示用户出错，并让用户重新输入。2） 比较“新密码

2、(N) ”和“新密码(S) ”，若两者一致，弹出密码修改成功消息框，程序终止执行。显示出错误消息，并让用户重新输入。3） 当单击“取消”按钮后，程序终止执行。代码如下：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 widget public partial class Fo

3、rm1 : Form public Form1() InitializeComponent(); private void button1_Click(object sender, EventArgs e) if (this.textBoxname.Text.Equals(admin) & this.textBoxpassword.Text.Equals(admin) if (this.textBoxNewpassword1.Text = this.textBoxNewpassword2.Text) MessageBox.Show(恭喜你！密码修改成功！); else if (this.tex

4、tBoxNewpassword1.Text != this.textBoxNewpassword2.Text ) MessageBox.Show(两次输入的密码不一致，请重新输入！); else MessageBox.Show(修改的密码不能为空！); else if (!this.textBoxname.Text.Equals(admin) | !this.textBoxpassword.Text.Equals(admin) MessageBox.Show(用户名或密码不正确,请重新输入！); private void cancel_Click(object sender, EventArg

5、s e) this.Close(); 运行结果如下：图1 密码修改成功界面3.2题目：编写包含菜单的计算程序建立一个如图3-2所示的应用程序，掌握菜单和工具栏的应用，并实现相应的功能。 图3-2 程序主界面代码如下：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 calcul

6、ate public partial class Form1 : Form public Form1() InitializeComponent(); private void 退出ToolStripMenuItem_Click(object sender, EventArgs e) this.Close(); private void 乘法ToolStripMenuItem_Click(object sender, EventArgs e) this.symbol.Text = X; try double num1 = Convert.ToDouble(this.textBox1.Text)

7、; double num2 = Convert.ToDouble(this.textBox2.Text); double result = num1 * num2; this.result.Text = Convert.ToString(result); catch (Exception ex) MessageBox.Show(输入的数字格式不正确，请重新输入！); private void 除法ToolStripMenuItem_Click(object sender, EventArgs e) this.symbol.Text = ; try double num1 = Convert.T

8、oDouble(this.textBox1.Text); double num2 = Convert.ToDouble(this.textBox2.Text); double result = num1 / num2; this.result.Text = Convert.ToString(result); catch (Exception ex) MessageBox.Show(输入的数字格式不正确，请重新输入！); private void 减法ToolStripMenuItem_Click(object sender, EventArgs e) this.symbol.Text = -;

9、 try double num1 = Convert.ToDouble(this.textBox1.Text); double num2 = Convert.ToDouble(this.textBox2.Text); double result = num1 - num2; this.result.Text = Convert.ToString(result); catch (Exception ex) MessageBox.Show(输入的数字格式不正确，请重新输入！); private void 加法ToolStripMenuItem_Click(object sender, EventA

10、rgs e) this.symbol.Text = +; try double num1 = Convert.ToDouble(this.textBox1.Text); double num2 = Convert.ToDouble(this.textBox2.Text); double result = num1 + num2; this.result.Text = Convert.ToString(result); catch(Exception ex) MessageBox.Show(输入的数字格式不正确，请重新输入！); private void 清除ToolStripMenuItem_

11、Click(object sender, EventArgs e) this.result.Text = ; this.textBox1.Text = ; this.textBox2.Text = ; private void Form1_Load(object sender, EventArgs e) private void textBox1_TextChanged(object sender, EventArgs e) 运行结果如下：图2 除法运算3.3题目：文本编辑器设计建立一个如图3-3所示的应用程序，掌握基础控件的应用，并按照窗体所列按钮实现相应的功能。图3-3 程序主界面代码如下

12、：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 edit public partial class Form1 : Form public Form1() InitializeComponent(); for (int i = 0; i FontFamily.Familie

13、s.Length; i+) this.cboFontName.Items.Add(FontFamily.Familiesi.Name); this.cboFontName.Text = 宋体; for (int i = 5; i 0) richTextBox1.Copy(); MessageBox.Show(复制成功！); private void SetRichTextBoxSelectionFont() if (!String.IsNullOrEmpty(this.cboFontSize.Text) richTextBox1.SelectionFont = new Font(this.cb

14、oFontName.Text, int.Parse(this.cboFontSize.Text), FontStyle.Regular); private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) this.SetRichTextBoxSelectionFont(); private void button5_Click(object sender, EventArgs e) this.Close(); private void button2_Click(object sender, EventArgs e

15、) if(richTextBox1.SelectedText != ) richTextBox1.Cut(); MessageBox.Show(剪切成功！); private void button3_Click(object sender, EventArgs e) if(Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) = true) if(richTextBox1.SelectionLength 0) / 询问是否覆盖 if(MessageBox.Show(要覆盖选择的吗?, 剪切, MessageBoxButtons.YesNo) = DialogResult.No) richTextBox1.SelectionStart = richTextBox1.SelectionStart + richTextBox1.SelectionLength; richTextBox1.Paste(); private void bu