实例介绍
【实例简介】
【实例截图】
【核心代码】
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 Mycalc
{
public partial class Form1 : Form
{
private decimal _x = 0, _y = 0, _result = 0;
private string _orperator = "";
private int _orperatorCount = 0;
private bool _firstNumberFlag = false;//首数字标志,用来直接开启下一个计算式
public Form1()
{
InitializeComponent();
}
private void buttonNum1_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "1";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "1";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum2_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "2";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "2";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum3_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "3";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "3";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum4_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "4";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "4";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum5_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "5";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "5";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum6_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "6";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "6";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum7_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "7";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "7";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum8_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "8";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "8";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum9_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "9";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "9";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonNum0_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = "0";
_firstNumberFlag = false;
}
else
textBox1.Text = textBox1.Text "0";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonplus_Click(object sender, EventArgs e)
{
_firstNumberFlag = true;
_orperatorCount = _orperatorCount 1;
if (_orperatorCount == 1)
{
_x = Convert.ToDecimal(textBox1.Text);
_orperator = " ";
textBox1.Text = "";
}
else
{
_y = Convert.ToDecimal(textBox1.Text);
if (_orperator == " ")
_x = _x _y;
else if (_orperator == "-")
_x = _x - _y;
else if (_orperator == "*")
_x = _x * _y;
else if (_orperator == "/")
_x = _x / _y;
_orperator = " ";
textBox1.Text = _x.ToString();
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonmin_Click(object sender, EventArgs e)
{
_firstNumberFlag = true;
_orperatorCount = _orperatorCount 1;
if (_orperatorCount == 1)
{
_x = Convert.ToDecimal(textBox1.Text);
_orperator = "-";
textBox1.Text = "";
}
else
{
_y = Convert.ToDecimal(textBox1.Text);
if (_orperator == " ")
_x = _x _y;
else if (_orperator == "-")
_x = _x - _y;
else if (_orperator == "*")
_x = _x * _y;
else if (_orperator == "/")
_x = _x / _y;
_orperator = "-";
textBox1.Text = _x.ToString();
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonmulti_Click(object sender, EventArgs e)
{
_firstNumberFlag = true;
_orperatorCount = _orperatorCount 1;
if (_orperatorCount == 1)
{
_x = Convert.ToDecimal(textBox1.Text);
_orperator = "*";
textBox1.Text = "";
}
else
{
_y = Convert.ToDecimal(textBox1.Text);
if (_orperator == " ")
_result = _x _y;
else if (_orperator == "-")
_x = _x - _y;
else if (_orperator == "*")
_x = _x * _y;
else if (_orperator == "/")
_x = _x / _y;
_orperator = "*";
textBox1.Text = _x.ToString();
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttondiv_Click(object sender, EventArgs e)
{
_firstNumberFlag = true;
_orperatorCount = _orperatorCount 1;
if (_orperatorCount == 1)
{
_x = Convert.ToDecimal(textBox1.Text);
_orperator = "/";
textBox1.Text = "";
}
else
{
_y = Convert.ToDecimal(textBox1.Text);
if (_orperator == " ")
_x = _x _y;
else if (_orperator == "-")
_x = _x - _y;
else if (_orperator == "*")
_x = _x * _y;
else if (_orperator == "/")
_x = _x / _y;
_orperator = "/";
textBox1.Text = _x.ToString();
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonpoint_Click(object sender, EventArgs e)
{
if (_firstNumberFlag == true)
{
textBox1.Text = ".";
_firstNumberFlag = false;
}
else
{
if(textBox1.Text.IndexOf('.')==-1)//判断前面是否有小数点
textBox1.Text = textBox1.Text ".";
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonend_Click(object sender, EventArgs e)
{
_y = Convert.ToDecimal(textBox1.Text);
if (_orperator == " ")
_result = _x _y;
else if (_orperator == "-")
_result = _x - _y;
else if (_orperator == "*")
_result = _x * _y;
else if (_orperator == "/")
_result = _x / _y;
textBox1.Text = _result.ToString();
_orperatorCount = 0;//消除连续的运算后的结果无法继续运行的bug
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonsign_Click(object sender, EventArgs e)//这个不太懂
{
if (textBox1.Text.Length >= -1)//非空
{
string firstChar = textBox1.Text.Substring(0, 1);//获得第一个字符
if (firstChar == " ")
textBox1.Text = " " textBox1.Text.Substring(1, textBox1.Text.Length - 1);
else if (firstChar == "-")
textBox1.Text = "-" textBox1.Text.Substring(1, textBox1.Text.Length - 1);
else
textBox1.Text = "-" textBox1.Text;
}
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonclear_Click(object sender, EventArgs e)
{
_x = 0; _y = 0; _result = 0;
_orperator = "";
_firstNumberFlag = false;
_orperatorCount = 0;
textBox1.Text = "";
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void buttonBS_Click(object sender, EventArgs e)
{
if (textBox1.Text.Length > 0)
textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);//去掉最后一个字符
textBox1.Focus();
textBox1.Select(textBox1.Text.Length, 0);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == '0')
buttonNum0_Click(sender, e);
else if (e.KeyChar == '1')
buttonNum1_Click(sender, e);
else if (e.KeyChar == '2')
buttonNum2_Click(sender, e);
else if (e.KeyChar == '3')
buttonNum3_Click(sender, e);
else if (e.KeyChar == '4')
buttonNum4_Click(sender, e);
else if (e.KeyChar == '5')
buttonNum5_Click(sender, e);
else if (e.KeyChar == '6')
buttonNum6_Click(sender, e);
else if (e.KeyChar == '7')
buttonNum7_Click(sender, e);
else if (e.KeyChar == '8')
buttonNum8_Click(sender, e);
else if (e.KeyChar == '9')
buttonNum9_Click(sender, e);
else if (e.KeyChar == '*')
buttonmulti_Click(sender, e);
else if (e.KeyChar == ' ')
buttonplus_Click(sender, e);
else if (e.KeyChar == '-')
buttonmin_Click(sender, e);
else if (e.KeyChar == '/')
buttondiv_Click(sender, e);
else if (e.KeyChar == '=')
buttonend_Click(sender, e);
else if (e.KeyChar == 'C')
buttonclear_Click(sender, e);
else if (e.KeyChar == '.')
buttonpoint_Click(sender, e);
else if (e.KeyChar == '8')//why ASCII is 8?
buttonBS_Click(sender, e);
textBox1.Select(textBox1.Text.Length, 0);
}
}
}
好例子网口号：伸出你的我的手 — 分享！
小贴士
感谢您为本站写下的评论，您的评论对其它用户来说具有重要的参考价值，所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字，对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙，所以请不要反馈意义不大的重复字符，也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明，或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦，又没人会搭理，于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享，对搜索内容的合法性不具有预见性、识别性、控制性，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论平台是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定，若资源存在侵权或相关问题请联系本站客服人员，点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论