黑马程序员--winform

 

 

学习了winform后，对winform有了一些初步的认识，winform通过控件来进行设计，有着所见即所得的好处，根据控件的不同属性，我们可以改变例如控件标题，颜色等等属性，根据控件所自带的事件，可以在不同情况下，执行不同的方法。

根据所学的知识，编写了一个简易的计算器，界面和代码如下。

代码：

public partial class Form1 : Form
    {

        int a;
        int b;
        int sum;
        bool add=false;
        bool jian=false;
        bool cheng=false;
        bool chu=false;//初始化变量
        public Form1()
        {
            
            InitializeComponent();
            
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            
        }
            

        private void button1_Click(object sender, EventArgs e)//根据用户不同的按键，确定用户输入的是几
        {
          
            string i = textBox1.Text;
            textBox1.Text = i + "1";
        }

        private void button2_Click(object sender, EventArgs e)
        {
           
            string i = textBox1.Text;
            textBox1.Text = i+"2";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "3";
        }

        private void button4_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "4";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "5";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "6";
        }

        private void button7_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "7";
        }

        private void button8_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "8";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            string i = textBox1.Text;
            textBox1.Text = i + "9";
        }

        private void button10_Click(object sender, EventArgs e)
        {
            textBox1.Text = null;//清空计算C
            a = 0;
            b = 0;
            sum = 0;
            
        }
        
        private void button11_Click(object sender, EventArgs e)
        {
            try
            {
                a = Convert.ToInt32(textBox1.Text);//当用户按键为+的时候
                textBox1.Text = null;
                add = true;
            }
            catch
            {
                MessageBox.Show("超出计算范围,请重新输入");//判断用户输入是否超出int范围
                a = 0;
                b = 0;
                sum = 0;
                textBox1.Text = null;
            }

           
            
        }

        private void button15_Click(object sender, EventArgs e)
        {
           if (add == true)
            {
                try
                {
                    b = Convert.ToInt32(textBox1.Text);
                    sum = a + b;
                    textBox1.Text = Convert.ToString(sum);
                    add = false;
                }
                catch
                {
                    MessageBox.Show("超出计算范围,请重新输入");
                    a = 0;
                    b = 0;
                    sum = 0;
                    textBox1.Text = null;
                }
               
            }
            else if (jian == true)
            {
                try
                {
                    b = Convert.ToInt32(textBox1.Text);
                    sum = a - b;
                    textBox1.Text = Convert.ToString(sum);
                    jian = false;
                }
                catch
                {
                    MessageBox.Show("超出计算范围,请重新输入");
                    a = 0;
                    b = 0;
                    sum = 0;
                    textBox1.Text = null;
                }

            }
            else if (cheng == true)
            {
                try
                {
                    b = Convert.ToInt32(textBox1.Text);
                    sum = a * b;
                    textBox1.Text = Convert.ToString(sum);
                    cheng = false;
                }
                catch
                {
                    MessageBox.Show("超出计算范围,请重新输入");
                    a = 0;
                    b = 0;
                    sum = 0;
                    textBox1.Text = null;
                }
            }
            else if (chu == true)
            {
                try
                {
                    b = Convert.ToInt32(textBox1.Text);
                    sum = a / b;
                    textBox1.Text = Convert.ToString(sum);
                    chu = false;
                }
                catch
                {
                    MessageBox.Show("超出计算范围,请重新输入");
                    a = 0;
                    b = 0;
                    sum = 0;
                    textBox1.Text = null;
                }
            }
            else
            {
                MessageBox.Show("未知错误");
                a = 0;
                b = 0;
                sum = 0;
                textBox1.Text = null;
            }

        }

        private void button12_Click(object sender, EventArgs e)
        {
            a = Convert.ToInt32(textBox1.Text);//判断用户想做什么运算
            textBox1.Text = null;
            jian = true;
        }

        private void button13_Click(object sender, EventArgs e)
        {
            a = Convert.ToInt32(textBox1.Text);//判断用户想做什么运算
            textBox1.Text = null;
            cheng = true;
        }

        private void button14_Click(object sender, EventArgs e)
        {
            a = Convert.ToInt32(textBox1.Text);//判断用户想做什么运算
            textBox1.Text = null;
            chu = true;
        }

        private void button16_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == null)//判断如果输入框是空的，那么就把i赋给文本框，反之 文本框的文本加上0
            {
                textBox1.Text = "0";
                
            }
            else{
            string i = textBox1.Text;
            textBox1.Text = i + "0";}
        }

        private void button17_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button18_Click(object sender, EventArgs e)
        {
            Form2 ss = new Form2();
            ss.ShowDialog();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }