GIS二次开发学习专题（一）C#入门

GIS二次开发学习专题（一）

假期时间想整理电脑内存，所以就把代码发到网上了，希望可以供大家参考，学习资料来自《牟乃夏 AE开发教程—基于C#.NET》
发的代码是我整理+老师布置的作业
第一部分是用c#写一个标准计算器和科学计算器

标准计算器与科学计算器在不同的窗体中，两者切换通过“按钮”来操作


首先是标准计算器的代码：
标准计算器是带括号的计算：

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 HelloWorld
{
    public partial class Form1 : Form
    {
        public static List<char> inputStr = new List<char>(1000);    //用链表保存用户的输入
        public Form1()
        {
            InitializeComponent();
        }
        /*控制显示界面*/
        private void Form1_load(object sender, EventArgs e)
        {
            txtReadout.Enabled = false;      //作用: 禁止人为手动修改
            CText.Enabled = false;      //如上            
            txtReadout.Text = "";            //初始化 显示
            CText.Text = "0"; 
        }
        /*按键数字0-9*/
        private void btnNum1_Click(object sender, EventArgs e)
        {
            inputStr.Add('1');                                       //在链表中追加记录
            txtReadout.AppendText("1");
        }
        //////////////////*以此类推*/
        /*小数点*/
        private void btnPoint_Click(object sender, EventArgs e)
        {
            inputStr.Add('.');                                      //在链表中追加记录
            txtReadout.AppendText(".");                             //在框中显示
        }
        /*左括号*/
        private void btnLeft_Click(object sender, EventArgs e)
        {
            inputStr.Add('(');
            txtReadout.AppendText("(");
        }
        /*右括号*////*加减乘除类似此处省略*/
        private void btnRight_Click(object sender, EventArgs e)
        {
            inputStr.Add(')');
            txtReadout.AppendText(")");
        }
        /*按钮[C]--所有值清零*/
        private void btnClear_Click(object sender, EventArgs e)
        {
            txtReadout.Text = "";
            inputStr.Clear();       //清空链表的所有元素
        }  
        /*删除、退格*/
        private void btnDele_Click(object sender, EventArgs e)
        {
            inputStr.RemoveAt(inputStr.Count - 1);              //点一次移除一格
            txtReadout.Text = "";
            for (int i = 0; i < inputStr.Count; i++)
            {
                txtReadout.Text += inputStr[i];
            }
        }
         /*等号*/
        private void btnEqual_Click(object sender, EventArgs e)
        {
            txtReadout.AppendText("=");
            CText.Text = txtReadout.Text;
            txtReadout.Text = DataOp.DataMain();
            string temp = DataOp.DataMain();                      //读取栈中算式
            inputStr.Clear();                                   //清除链表存算式
            for (int i = 0; i < temp.Length; i++)
            {
                inputStr.Add(temp[i]);
            }
        }
        /*输入栏*/
        private void Tab(object sender, EventArgs e)
        {
            ScienceCa science = new ScienceCa();
            this.Hide();
            science.ShowDialog();
            Application.ExitThread();
        }
        class DataOp : Form1
        {
            static Stack<double> number = new Stack<double>();  //创建栈存数字
            static Stack<char> symbol = new Stack<char>();      //创建栈存符号
            /*从inputStr中读值*/
            public static void Read()
            {
                for (int i = 0; i < inputStr.Count; i++)
                {
                    if (!IsOperator(inputStr[i]))                               //判断是否是操作符，取出算式中的数字入栈
                    {
                        string symbol = null;
                        while (i < inputStr.Count && !IsOperator(inputStr[i]))
                        {
                            symbol += inputStr[i];
                            i++;
                        }
                        i--;
                        double num2 = Convert.ToDouble(symbol);                         //将string转化为double 
                        number.Push(num2);                                              //入栈
                    }
                    else if (IsOper(inputStr[i]))   //判断是否是运算符+ - * /
                    {
                        if (symbol.Count.Equals(0) || symbol.Peek().Equals('('))
                        {
                            symbol.Push(inputStr[i]);
                        }
                        else if (OperatorPrecedence(inputStr[i]) > OperatorPrecedence(symbol.Peek()))
                        {
                            symbol.Push(inputStr[i]);
                        }
                        else
                        {
                            double num1, num2;
                            char sym1;
                            num2 = number.Pop();
                            num1 = number.Pop();
                            sym1 = symbol.Pop();
                            double sum = Operat(num1, num2, sym1);
                            number.Push(sum);
                            symbol.Push(inputStr[i]);
                        }
                    }
                    else                    //（和）
                    {
                        if (inputStr[i].Equals('('))
                        {
                            symbol.Push(inputStr[i]);
                        }
                        else if (inputStr[i].Equals(')'))
                        {
                            while (!symbol.Peek().Equals('('))
                            {
                                double num1, num2;
                                char sym1;
                                num2 = number.Pop();
                                num1 = number.Pop();
                                sym1 = symbol.Pop();
                                double sum = Operat(num1, num2, sym1);
                                number.Push(sum);
                            }
                            symbol.Pop();
                        }
                    }
                }
            }
            public static double PopStack()   //栈顶
            {
                double result = 0;
                double num1, num2;
                char sym1;
                while (symbol.Count != 0)
                {
                    num2 = number.Pop();
                    num1 = number.Pop();
                    sym1 = symbol.Pop();
                    result = Operat(num1, num2, sym1);
                    number.Push(result);
                }
                return result;
            }
/*未完*/

下面是判断是否是操作符和运算符

public static bool IsOperator(char c)   //是否是操作符
            {
                if (c.Equals('+') || c.Equals('-') || c.Equals('*') || c.Equals('/') || c.Equals('(') || c.Equals(')') || c.Equals('²'))
                    return true;
                return false;
            }
             public static bool IsOper(char c)   //是否是运算符
            {
                if (c.Equals('+') || c.Equals('-') || c.Equals('*') || c.Equals('/') || c.Equals('²'))
                    return true;
                return false;
            }
             public static int OperatorPrecedence(char a)    //操作符优先级
            {
                int i = 0;
                switch (a)
                {
                    case '+': i = 3; break;
                    case '-': i = 3; break;
                    case '*': i = 4; break;
                    case '/': i = 4; break;
                }
                return i;
            }
             public static double Operat(double n1, double n2, char s1)
            {
                double result = 0;
                switch (s1)
                {
                    case '+': result = n1 + n2; break;
                    case '-': result = n1 - n2; break;
                    case '*': result = n1 * n2; break;
                    case '/': result = n1 / n2; break;
                }
                return result;
            }
         
            public static string DataMain()
            {
                Read();
                return PopStack().ToString();
            }
            }
    }
}

其中读取算式的是txtReadOut，显示输出结果的是CText，如果不是想提高难度的话，可以把括号去了，因为有括号就涉及到运算符运算顺序，这些写法我也是参照许多大佬的代码改的

侵删

科学计算器：

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;
using System.Threading.Tasks;

这两个计算器可以用TabControl放在一个Form里，但是我觉得那样按钮命名比较麻烦，所以我打算用button切换，两个代码要放到一个命名空间：

public partial class ScienceCa : Form
    {
        double num1, num2,num3, result;           // 操作数及运算结果
        bool decimalFlag = false;             // 判断输入的是否为小数
        string myOperator;                    // 操作类型
        public ScienceCa()
        {
            InitializeComponent();
        }
        public void NumClick(int inNumber)
        {
            
            if (decimalFlag)                    //如果输入的是小数，直接增加到文本框中
            {
                txtReadout.Text = txtReadout.Text + inNumber;
            }
            else
            {
                if (txtReadout.Text == "0.")     // 输入整数
                {
                    // 输入的是整数的第一个数字
                    txtReadout.Text = inNumber + ".";
                }
                else
                {
                    // 否则从第0个字符开始,截取输入的不是整数的第一个数字
                    txtReadout.Text = txtReadout.Text.Substring(0, txtReadout.Text.Length - 1) + inNumber + ".";
                }
            }
        }
        /*控制显示界面*/
        private void Form1_load(object sender, EventArgs e)
        {
            txtReadout.Text = "0.";
            txtReadout.TextAlign = HorizontalAlignment.Right;
        }
        /*按键数字0-9*/
        private void btnNum1_Click(object sender, EventArgs e)
        {
            NumClick(1);
        }
        ......
        

相同的按钮都是复制form1的按钮

/*[C]所有值清零*/
        private void btnClear_Click(object sender, EventArgs e)
        {
            num1 = 0;
            num2 = 0;
            txtReadout.Text = "0.";
            decimalFlag = false;        //[C]所有数值回归
        }
        /*[CE]当前输入值清零*/
        private void btnClearEntry_Click(object sender, EventArgs e)
        {
            result = 0;                 //上一次计算结果清除
            num2 = 0;                   //本次输入数字清除
            txtReadout.Text = "0.";
        }
        /*删除、退格*/
        private void btnDele_Click(object sender, EventArgs e)
        {
            string str=txtReadout.Text;
            if (str.Length > 0)                                             //长度>0，点一次截取一次
            {
                str = str.Substring(0, str.Length - 1);
                if (str.Length == 0)
                {
                    txtReadout.Text = "0.";
                }
                else
                    txtReadout.Text = str;
            }
        }
         /*加法*/
        private void btnAdd_Click(object sender, EventArgs e)
        {
            myOperator = "Add";
            num1 = double.Parse(txtReadout.Text);       //将字符串转换为double类型
            txtReadout.Text = "0.";
            decimalFlag = false;
        }
        /*减法*/
        private void btnSub_Click(object sender, EventArgs e)
        {
            myOperator = "Sub";
            num1 = double.Parse(txtReadout.Text);
            txtReadout.Text = "0.";
            decimalFlag = false;
        }
        /*乘法*/
        private void btnMulti_Click(object sender, EventArgs e)
        {
            myOperator = "Multi";
            num1 = double.Parse(txtReadout.Text);
            txtReadout.Text = "0.";
            decimalFlag = false;
        }
        /*除法*/
        private void btnDivi_Click(object sender, EventArgs e)
        {
            myOperator = "Divi";
            num1 = double.Parse(txtReadout.Text);
            txtReadout.Text = "0.";
            decimalFlag = false;
        }
        /*求相反数*/
        private void btnOpp_Click(object sender, EventArgs e)
        {
            myOperator = "Opp";
            num1 = double.Parse(txtReadout.Text);
            num3 = -num1;
            txtReadout.Text = num3.ToString();
            decimalFlag = false;
        }
        /*求二次根式*/
        private void btnSqrt_Click(object sender, EventArgs e)
        {
            myOperator = "Sqrt";
            num3 = double.Parse(txtReadout.Text);
            if (num3 < 0)                              //负数不能开平方根
                txtReadout.Text = "负数不可开平方根!错误!";
            num3 = Math.Sqrt(num3);
            txtReadout.Text = num3.ToString();
        }
        /*求倒数*/
        private void btnOneDivi_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            if (num3 == 0.0)
                txtReadout.Text = "零不可做分母!错误!";
            num3 = 1 / num3;
            txtReadout.Text = num3.ToString();
        }
        /*百分号*/
        private void btnPercent_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = num3 / 100;
            txtReadout.Text = num3.ToString();
        }
        /*Abs--计算显示数字的绝对值。*/
        private void btn_Abs_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            if (num3 < 0)
            {
                num3 = -num3;
            }
            txtReadout.Text = num3.ToString();
        }
        /*ln--求以e为底的对数值*/
        private void btn_Ln_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            if (num3 > 0)
            {
                num3 = Math.Log(num3);
                txtReadout.Text = num3.ToString();
            }
            else
                txtReadout.Text = "真数必须>0";
            decimalFlag = false;
        }
        /*Mod--求余运算*/
        private void btn_Mod_Click(object sender, EventArgs e)
        {
            myOperator = "Mod";
            num1 = double.Parse(txtReadout.Text);
            txtReadout.Text = "0.";
            decimalFlag = false;
        }
        /*lg--求以10为底的对数值*/
        private void btn_Lg_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            if (num3 > 0)
            {
                num3 = Math.Log10(num3);
                txtReadout.Text = num3.ToString();
            }
            else
                txtReadout.Text = "真数必须>0";
        }
        /*sin--求显示数字的正弦值*/
        private void btn_sin_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = Math.PI * (num3 / 180);
            num3 = Math.Sin(num3);
            if (num3 < Math.Pow(10, -10))
                txtReadout.Text = "0";
            else txtReadout.Text = num3.ToString();
        }
        /*计算阶乘n!*/
        private void btn_factori_Click(object sender, EventArgs e)
        {
            double number = double.Parse(txtReadout.Text);
             num3=1;
             for (int i = 1; i <= number; i++)
            {
                num3= i * num3;
            }
            txtReadout.Text = num3.ToString();
            decimalFlag = false;
        }
        /*sin--求显示数字的余弦值*/
        private void btn_cos_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = Math.PI * (num3 / 180);
            num3 = Math.Cos(num3);
            if (num3 < Math.Pow(10, -10))
                txtReadout.Text = "0";
            else txtReadout.Text = num3.ToString();
        }
        /*计算以10为底的指数*/
        private void btn_tenPower_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = Math.Pow(10, num3);
            txtReadout.Text = num3.ToString();
            decimalFlag = false;
        }
        /*tan--求显示数字的正切值*/
        private void btn_tan_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            if ((num3+90) % 90 == 0)                 //tan函数的定义域不等于kπ+π/2
            {
                txtReadout.Text = "该值不在正切函数定义域内！";
            }
            else
            {
                num3 = Math.PI * (num3/180);
                result = Math.Tan(num3);
                if (num3 < Math.Pow(10, -10))
                    txtReadout.Text = "0";
                else txtReadout.Text = result.ToString();
            }
        }
         /*计算以e为底的指数 */
        private void btn_ePower_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = Math.Exp(num3);
            txtReadout.Text = num3.ToString();
        }
        /*求显示数字的平方*/
        private void btn_square_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = num3 * num3 ;
            txtReadout.Text = num3.ToString();
             }
        /*求显示数字的立方*/
        private void btn_cube_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            num3 = num3 * num3 * num3;
            txtReadout.Text = num3.ToString();
            }
        /*求幂值（非单目运算）*/
        private void btn_xn_power_Click(object sender, EventArgs e)
        {
            myOperator = "xn_power";
            num1 = double.Parse(txtReadout.Text);       //将字符串转换为double类型
            txtReadout.Text = "0.";
          }
        /*求立方根*/
        private void btn_cubeRoot_Click(object sender, EventArgs e)
        {
            num3 = double.Parse(txtReadout.Text);
            double number = 3;
            num3 = Math.Pow(num3,1/number);
            txtReadout.Text = num3.ToString();
        }
        /*开n次方根（非单目运算）*/
        private void btn_nRoot_Click(object sender, EventArgs e)
        {
            myOperator = "nRoot";
            num1 = double.Parse(txtReadout.Text);
            txtReadout.Text = "0.";
        }
 /*等号*/
        private void btnEqual_Click(object sender, EventArgs e)
        {
            num2 = double.Parse(txtReadout.Text);
            switch (myOperator)
            {
                case "Add":
                    result = num1 + num2;
                    txtReadout.Text = result.ToString();
                    break;
                case "Sub":
                    result = num1 - num2;
                    txtReadout.Text = result.ToString();
                    break;
                case "Multi":
                    result = num1 * num2;
                    txtReadout.Text = result.ToString();
                    break;
                    case "Divi":
                    if (num2 == 0)
                    {
                        txtReadout.Text = "除数不能为0";
                    }
                    else
                    {
                        result = num1 / num2;
                        txtReadout.Text = result.ToString();
                    }
                    break;
                case "nRoot":
                    if (num2 == 0)
                    {
                        txtReadout.Text = "除数不能为0";
                    }
                    else
                    {
                        result = Math.Pow(num1, 1 / num2);
                        txtReadout.Text = result.ToString();
                    }
                    break;
                    case "xn_power":
                    result = Math.Pow(num1, num2);
                    txtReadout.Text = result.ToString();
                    break;
                case "Mod":
                    if (num2 == 0)
                    {
                        txtReadout.Text = "除数不能为0";
                    }
                    result = num1 % num2;
                    txtReadout.Text = result.ToString();
                    break;
                    
            }
        }
        /*切换至标准计算器*/
        private void btnChange_biao_Click(object sender, EventArgs e)
        {
            Form1 form = new Form1();
            this.Hide();
            form.ShowDialog();
            Application.ExitThread();
        }
        }
                    

以上就是所有的代码，关于窗口的具体设置可以自己摸索。
代码来源于老师+CDSN+自己摸索
源码链接：
https://download.csdn.net/download/Ziaaaaa/12111842
欢迎大家和我一起交流学习！