標籤:c# windows應用
組合框使用方法,按照下面圖片上提示,設計一個windows應用程式,實現不同運算。
介面設計:
代碼:
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 = "選擇不同運算子進行計算"; 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) { } }}
運行: