【C#】上机实验七

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1、开发一个窗体应用程序，窗体上能接收华氏温度或者摄氏温度，点击相应按钮可以相互转换。
要求转换后的华氏温度或者摄氏温度保留小数点后3位，程序中要有异常处理结构。

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 
10 namespace Myform1
11 {
12     public partial class Form1 : Form
13     {
14         public Form1()
15         {
16             InitializeComponent();
17         }
18 
19         private void label1_Click(object sender, EventArgs e)
20         {
21 
22         }
23 
24         private void button1_Click(object sender, EventArgs e)
25         {
26             try
27             {
28                 textBox2.Text = htc(textBox1.Text).ToString("f3");
29             }
30             catch (Exception ex)
31             {
32                 Text = ex.Message;
33             }
34         }
35 
36         private void button2_Click(object sender, EventArgs e)
37         {
38             try
39             {
40                 textBox1.Text = cth(textBox2.Text).ToString("f3");
41             }
42             catch (Exception ex)
43             {
44                 Text = ex.Message;
45             }
46         }
47 
48         public double htc( double x ){
49             return (x - 32) * 5 / 9; 
50         }
51 
52         public double htc(string s)
53         {
54             double x = double.Parse(s);
55             return (x - 32) * 5 / 9;
56         }
57 
58         public double cth(double x) 
59         {
60             return (x * 9 / 5) + 32;
61         }
62         public double cth(string s)
63         {
64             double x = double.Parse(s);
65             return (x * 9 / 5) + 32;
66         }
67 
68     }
69 }

温度转换

2、设计一个窗体应用程序，输入一个字符，判定此字符是数字、大写字母、小写字母，还是其它字符。
要求：
（1）类中定义公有方法（判断字符归属）
（2）在按钮单击事件中调用该方法及返回值完成判断。
（3）程序中要有异常处理结构。

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 
10 namespace Myproject2
11 {
12     public partial class Form1 : Form
13     {
14         public Form1()
15         {
16             InitializeComponent();
17         }
18 
19         private void button1_Click(object sender, EventArgs e)
20         {
21             string s = textBox1.Text;
22             if (s.Length > 1) 
23             {
24                 Text = "请输入一个字符";
25                 textBox1.Text = "";
26                 textBox2.Text = "";
27                 MessageBox.Show("请输入一个字符", "Warming", MessageBoxButtons.OK);
28             }
29 
30             if( s.Length == 1 )
31             try
32             {
33                 char ch = s[0];
34                 if ('a' <= ch && ch <= 'z') {
35                     textBox2.Text = "小写字母";
36                 }
37                 else if ('A' <= ch && ch <= 'Z') {
38                     textBox2.Text = "大写字母";
39                 }
40                 else if ('0' <= ch && ch <= '9')
41                 {
42                     textBox2.Text = "数字";
43                 }
44                 else {
45                     textBox2.Text = "其他字符";
46                 }
47             }
48             catch (Exception ex)
49             {
50                 Text = ex.Message;
51             }
52         }
53 
54         private void button2_Click(object sender, EventArgs e)
55         {
56             textBox1.Text = "";
57             textBox2.Text = "";
58         }
59 
60     }
61 }

判断字符

3、开发一个窗体应用程序，可以根据圆的半径计算圆的面积。具体要求如下：
（1）设计一个方法求圆的面积。
（2）求圆面积的方法要定义成重载方法，既能接收整形参数，也能接收单精度类型参数。
（3）程序中要有异常处理结构。

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 
10 namespace Myproject3
11 {
12     public partial class Form1 : Form
13     {
14         public Form1()
15         {
16             InitializeComponent();
17         }
18 
19         private void button1_Click(object sender, EventArgs e)
20         {
21             string str = textBox1.Text;
22             double d = 0;
23             int x = 0;
24             bool Is_int = false;
25             bool Is_double = false;
26 
27             if (Is_int = int.TryParse(str, out x)){}
28             else if ( Is_double = double.TryParse(str, out d)){}
29 
30             if (Is_int || Is_double)
31             {
32                 try
33                 {
34                     if (Is_int)
35                     {
36                         textBox2.Text = (Math.PI * x * x).ToString("f2");
37                     }
38                     else
39                     {
40                         textBox2.Text = (Math.PI * d * d).ToString("f2");
41                     }
42 
43                 }
44                 catch (Exception ex)
45                 {
46                     Text = ex.Message;
47                 }
48             }
49             else
50             {
51                 MessageBox.Show("请输入数字", "Warning", MessageBoxButtons.OK);
52                 textBox1.Text = textBox2.Text = "";
53 
54             }
55         }
56     }
57 }

求圆的面积

4、设计一个窗体应用程序，练习最基本的控件使用，实现单选按钮、复选按钮和命令按钮的相关功能。

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Windows.Forms;
 9 
10 namespace Myproject4
11 {
12     public partial class Form1 : Form
13     {
14         public Form1()
15         {
16             InitializeComponent();
17         }
18 
19         private void groupBox1_Enter(object sender, EventArgs e)
20         {
21 
22         }
23         private FontFamily fontFamily = new FontFamily("宋体");
24         private FontStyle Style = FontStyle.Regular;
25         private float Size = 10 ;
26         private void radioButton1_CheckedChanged(object sender, EventArgs e)
27         {
28             fontFamily = new FontFamily("黑体");
29             textBox1.Font = new Font(fontFamily, Size, Style);
30         }
31 
32         private void radioButton2_CheckedChanged(object sender, EventArgs e)
33         {
34             fontFamily = new FontFamily("楷体");
35             textBox1.Font = new Font(fontFamily, Size, Style);
36         }
37 
38         private void checkBox1_CheckedChanged(object sender, EventArgs e)
39         {
40             Style ^= FontStyle.Bold;
41             textBox1.Font = new Font(fontFamily, Size, Style);
42         }
43 
44         private void checkBox2_CheckedChanged(object sender, EventArgs e)
45         {
46             Style ^= FontStyle.Italic;
47             textBox1.Font = new Font(fontFamily, Size, Style);
48         }
49 
50         private void radioButton4_CheckedChanged(object sender, EventArgs e)
51         {
52             Size = 15;
53             textBox1.Font = new Font(fontFamily, Size, Style);
54         }
55 
56         private void radioButton3_CheckedChanged(object sender, EventArgs e)
57         {
58             Size = 30;
59             textBox1.Font = new Font(fontFamily, Size, Style);
60         }
61 
62         private void radioButton6_CheckedChanged(object sender, EventArgs e)
63         {
64             textBox1.ForeColor = Color.Red;
65         }
66 
67         private void radioButton5_CheckedChanged(object sender, EventArgs e)
68         {
69             textBox1.ForeColor = Color.Blue ;
70         }
71 
72         private void button1_Click(object sender, EventArgs e)
73         {
74             textBox1.Copy();
75         }
76 
77         private void button2_Click(object sender, EventArgs e)
78         {
79             textBox1.Cut();
80         }
81 
82         private void button3_Click(object sender, EventArgs e)
83         {
84             textBox1.Paste();
85         }
86 
87         private void button4_Click(object sender, EventArgs e)
88         {
89             textBox1.Undo();
90         }
91 
92     }
93 }