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2021.10.29 c#简易计算器 窗体控件

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2021.10.29 c#简易计算器 窗体控件

2024-05-09 16:28| 来源: 网络整理| 查看: 265

一、今日学习内容

 

1．编写一个计算器，练习在窗体上添加控件、调整控件的布局，设置或修改控件属性，

编写事件处理程序的方法。 

(1)新建 windows 应用程序。在窗体 Form 上拖放一个 TextBox 控件、十六个 Button 控

件，整个窗体布局如下图所示。 

 

 

(2)打开代码窗口，添加如下全局变量：

  double a = 0;  

  double b = 0;

  bool c = false;

  string d;

(3)双击”1”按钮，添加如下事件处理程序：

  private void button1_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

           textBox1.Text = "";

           c = false;

      }

      textBox1.Text += "1";

  }

(4)双击”2”按钮，添加如下事件处理程序：

  private void button2_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

           textBox2.Text = "";

           c = false;

      }

           textBox1.Text += "2";

  }

 (5)双击”3”按钮，添加如下事件处理程序：

  private void button3_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

           textBox3.Text = "";

           c = false;

      }

      textBox1.Text += "3";

  }

 (6)双击”4”按钮，添加如下事件处理程序：

  private void button4_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

           textBox1.Text = "";

           c = false;

      }

      textBox1.Text += "4";

  }

 (7)双击”5”按钮，添加如下事件处理程序：

  private void button5_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

          textBox1.Text = "";

          c = false;

      }

      textBox1.Text += "5";

  }

  (8)双击”6”按钮，添加如下事件处理程序：

  private void button6_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

          textBox1.Text = "";

          c = false;

      }

      textBox1.Text += "6";

  }

 (8)双击”7”按钮，添加如下事件处理程序：

  private void button7_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

          textBox1.Text = "";

          c = false;

      }

      textBox1.Text += "7";

  }

  (10)双击”8”按钮，添加如下事件处理程序：

  private void button8_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

          textBox1.Text = "";

          c = false;

      }

      textBox1.Text += "8";

  }

  (11)双击”9”按钮，添加如下事件处理程序：

  private void button9_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

           textBox1.Text = "";

           c = false;

      }

      textBox1.Text += "9";

  }

  (12)双击”0”按钮，添加如下事件处理程序：

  private void button12_Click(object sender, EventArgs e)

  {

      if (c == true)

      {

          textBox1.Text = "";

          c = false;

      }

      textBox1.Text += "0";

      if (d == "/")

      {

          textBox1.Clear();

     MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK,

MessageBoxIcon.Warning);

      }

  }

  (13)双击”+”按钮，添加如下事件处理程序：

  private void button13_Click(object sender, EventArgs e)

  {

      c = true;

      b = double.Parse(textBox1.Text);

      d = "+";

  }

  (14)双击”-”按钮，添加如下事件处理程序：

  private void button16_Click(object sender, EventArgs e)

  {

      c = true;

      b = double.Parse(textBox1.Text);

      d = "-";

  }

  (15)双击”*”按钮，添加如下事件处理程序：

  private void button15_Click(object sender, EventArgs e)

  {

      c = true;

      b = double.Parse(textBox1.Text);

      d = "*";

  }

  (16)双击”/”按钮，添加如下事件处理程序：

  private void button14_Click(object sender, EventArgs e)

  {

      c = true;

      b = double.Parse(textBox1.Text);

      d = "/";

  }

  (17)双击”=”按钮，添加如下事件处理程序：

  private void button17_Click(object sender, EventArgs e)

  {

      switch (d)

      {

          case "+": a = b + double.Parse(textBox1.Text); break;

          case "-": a = b - double.Parse(textBox1.Text); break;

          case "*": a = b * double.Parse(textBox1.Text); break;

          case "/": a = b / double.Parse(textBox1.Text); break;

      }

      textBox1.Text = a + "";

      c = true;

  }

(18)双击”c”按钮，添加如下事件处理程序：

  private void button18_Click(object sender, EventArgs e)

  {

      textBox1.Text = "";

  }

(19)单击启动调试工具，运行计算器。

(20)在计算器中，增加四个功能键：x2，sqrt，log, ln 四个键，分别计算求平方，开方，

log，ln 值

private void button15_Click(object sender, EventArgs e) { switch (d) { case "+": a = b + double.Parse(textBox1.Text); break; case "-": a = b - double.Parse(textBox1.Text); break; case "*": a = b * double.Parse(textBox1.Text); break; case "/": a = b / double.Parse(textBox1.Text); break; case "x^2": a = b * b; break; case "sqrt": a = Math.Sqrt(b); break; case "log": a = Math.Log10(b); break; case "ln": a = Math.Log(b); break; } textBox1.Text = a + ""; c = true; } private void button17_Click(object sender, EventArgs e) { c = true; b = double.Parse(textBox1.Text); d = "x^2"; } private void button18_Click(object sender, EventArgs e) { c = true; b = double.Parse(textBox1.Text); d = "sqrt"; } private void button19_Click(object sender, EventArgs e) { c = true; b = double.Parse(textBox1.Text); d = "log"; } private void button20_Click(object sender, EventArgs e) { c = true; b = double.Parse(textBox1.Text); d = "ln"; }

 

 

 

 

 2、

自己设计并编写一个 Windows 应用程序，要求用到 TextBox、GroupBox、

RadioButton、CheckBox、ComboBox、ListBox 控件。将程序功能、界面布局和运行结果

 

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 WindowsFormsApplication1 { public partial class Form3 : Form { public Form3() { InitializeComponent(); } private void listBox1_SelectedIndexChanged(object sender, EventArgs e) { richTextBox1.Text += "专业：" + listBox1.SelectedItem + "\n"; } private void groupBox1_Enter(object sender, EventArgs e) { } private void groupBox2_Enter(object sender, EventArgs e) { } private void richTextBox1_TextChanged(object sender, EventArgs e) { } private void radioButton2_CheckedChanged(object sender, EventArgs e) { if (radioButton2.Checked == true) richTextBox1.Text += "性别：" + radioButton1.Text + "\n"; } private void radioButton1_CheckedChanged(object sender, EventArgs e) { if (radioButton1.Checked == true) richTextBox1.Text += "性别：" + radioButton1.Text + "\n"; } private void textBox1_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == 13) //如果键入回车键，则向richTextBox1中添加姓名 richTextBox1.Text += "姓名：" + textBox1.Text + "\n"; } private void textBox2_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == 13) //如果键入回车键，则向richTextBox1中添加学号 richTextBox1.Text += "学号：" + textBox2.Text + "\n"; } private void comboBox1_KeyPress(object sender, KeyPressEventArgs e) { if ((e.KeyChar == 13) && comboBox1.Text != "") richTextBox1.Text += "班级：" + comboBox1.Text + "\n"; } private void checkBox1_CheckedChanged(object sender, EventArgs e) { if (checkBox1.Checked == true) richTextBox1.Text += "爱好:" + checkBox1.Text + "\n"; } private void checkBox2_CheckedChanged(object sender, EventArgs e) { if (checkBox2.Checked == true) richTextBox1.Text += "爱好:" + checkBox2.Text + "\n"; } private void checkBox3_CheckedChanged(object sender, EventArgs e) { if (checkBox3.Checked == true) richTextBox1.Text += "爱好:" + checkBox3.Text + "\n"; } private void checkBox4_CheckedChanged(object sender, EventArgs e) { if (checkBox4.Checked == true) richTextBox1.Text += "爱好:" + checkBox4.Text + "\n"; } private void checkBox5_CheckedChanged(object sender, EventArgs e) { if (checkBox5.Checked == true) richTextBox1.Text += "爱好:" + checkBox5.Text + "\n"; } private void button1_Click(object sender, EventArgs e) { //将文件以RTF格式保存到指定路径下 richTextBox1.SaveFile(@"F:\.net实验三\xinxi.rtf", RichTextBoxStreamType.RichText); } private void button2_Click(object sender, EventArgs e) { richTextBox1.Clear(); } private void button3_Click(object sender, EventArgs e) { //将指定文件加载到RichTextBox中 richTextBox1.LoadFile(@"F:\.net实验三\xinxi.rtf", RichTextBoxStreamType.RichText); } } }

 

 

 



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