c#中的温度转换

（1）界面图

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace WindowsFormsApplication4{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { float x; double y; try { //Single.Parse(textBox1.Text);将字符串类型数值转换成等效单精度浮点数值 x = Single.Parse(textBox1.Text); y = getValue(x); label2.Text = "" + y; } catch (MyException ee) { label2.Text = ee.Message; } catch (FormatException ee) { label2.Text = ee.Message; } } private double getValue(float x) { double y; if (x < -273.15f) throw new MyException(); y = x * 1.8f + 32; return y; } class MyException : ApplicationException { public MyException() : base("温度超出范围") { } } private void textBox1_TextChanged(object sender, EventArgs e) { } }}