本文小编为大家详细介绍“C#怎么实现计算器窗体程序”，内容详细，步骤清晰，细节处理妥当，希望这篇“C#怎么实现计算器窗体程序”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
1、计算器中，添加 0-9 共十个数字键。
2、计算器中，增添 加、减、乘、除、等于五个功能键。
3、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。
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 test3_1
{
public partial class Form1 : Form
{
double result = 0; //存储计算结果
double number = 0; //存储输入的数字
bool exist_value = false; //判断文本框中是否有值
string operation; //存储输入的运算符
/*
* 初始化
*/
public Form1()
{
InitializeComponent();
}
/*
* 数字键触发事件实现
*/
private void Seven_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "7";
}
private void Eight_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "8";
}
private void Nine_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "9";
}
private void Four_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "4";
}
private void Five_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "5";
}
private void Six_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "6";
}
private void One_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "1";
}
private void Two_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "2";
}
private void Three_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "3";
}
private void Zero_Click(object sender, EventArgs e)
{
if (exist_value == true)
{
textBox1.Text = "";
exist_value = false;
}
textBox1.Text += "0";
}
/*
* 功能键触发事件
*/
private void Add_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "+";
}
}
private void Sub_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "-";
}
}
private void Mul_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "*";
}
}
private void Div_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "/";
}
}
private void Squ_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "x^2";
}
}
private void Sqrt_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "sqrt";
}
}
private void Log_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "log";
}
}
private void Ln_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("请先输入值再计算！", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
exist_value = true;
number = double.Parse(textBox1.Text);
operation = "ln";
}
}
private void Del_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
private void Equ_Click(object sender, EventArgs e)
{
switch (operation)
{
case "+": result = number + double.Parse(textBox1.Text); break;
case "-": result = number - double.Parse(textBox1.Text); break;
case "*": result = number * double.Parse(textBox1.Text); break;
case "/":
{
double temp=double.Parse(textBox1.Text);
if (temp != 0)
result = number / temp;
else
MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
break;
}
case "x^2": result = number * number; break;
case "sqrt": result = Math.Sqrt(number); break;
case "log": result = Math.Log10(number); break;
case "ln": result = Math.Log(number); break;
}
textBox1.Text = result + "";
exist_value = true;
}
}
}界面设计
运行结果
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