组合框使用方法,按照下面图片上提示,设计一个windows应用程序,实现不同运算。
界面设计:
代码:
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 combox { public partial class Form1 : Form { public Form1() { InitializeComponent(); label1.Text = "="; button1.Text = "选择不同运算符进行计算"; comboBox1.Items.Add("+"); comboBox1.Items.Add("-"); comboBox1.Items.Add("*"); comboBox1.Items.Add("/"); } private void label1_Click(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { float a, b, c; a = Convert.ToSingle(textBox1.Text); b = Convert.ToSingle(textBox2.Text); if (comboBox1.Text== "+") { c = a + b; textBox3.Text = c.ToString(); } else if (comboBox1.Text == "-") { c = a - b; textBox3.Text = c.ToString() ; } else if (comboBox1.Text == "*") { c = a * b; textBox3.Text = c.ToString(); } else { c = a / b; textBox3.Text = c.ToString(); } } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { } } }
运行:
[C#]组合框设计windows加减乘除简单计算器应用,布布扣,bubuko.com
原文地址:http://blog.csdn.net/sr_19930829/article/details/25408061