计算器简单封装和ASP.net

  private void Form1_Load(object sender, EventArgs e)
        {
            if (File.Exists(path))
            {
                this.richTextBox1.LoadFile(path, RichTextBoxStreamType.RichText);
                open.Enabled = true;
            }
            save.Enabled = true;
        }

        private void open_Click(object sender, EventArgs e)
        {
            OpenFileDialog TxTOPenDialog = new OpenFileDialog();
            TxTOPenDialog.Filter = "RTF文件(*.RTF)|*.RTF";
            if (TxTOPenDialog.ShowDialog() == DialogResult.OK)
            {
                path = TxTOPenDialog.FileName;
                this.richTextBox1.LoadFile(TxTOPenDialog.FileName, RichTextBoxStreamType.RichText);
                open.Enabled = true;
                save.Enabled = true;
                MessageBox.Show(" 读取成功!", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                this.richTextBox1.Show();
            }
        }



        private void save_Click(object sender, EventArgs e)
        {
            SaveFileDialog TxTSaveDialog = new SaveFileDialog();
            TxTSaveDialog.Filter = "RTF文件(*.RTF)|*.RTF";
            richTextBox1.Text = textBox2.Text;
            if (File.Exists(path))
            {
                this.richTextBox1.SaveFile(path, RichTextBoxStreamType.RichText);
                MessageBox.Show(" 保存成功!", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                this.richTextBox1.Clear();
                save.Enabled = false;
            }
            else
            {
                if (TxTSaveDialog.ShowDialog() == DialogResult.OK)
                {
                    this.richTextBox1.SaveFile(TxTSaveDialog.FileName, RichTextBoxStreamType.RichText);
                    MessageBox.Show(" 保存成功!", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                    this.richTextBox1.Clear();
                    save.Enabled = false;
                }
            }
        }


 private void add_Click(object sender, EventArgs e)
        {
            SUAN.Text = "+";
        }

        private void sub_Click(object sender, EventArgs e)
        {
            SUAN.Text = "-";
        }

        private void mul_Click(object sender, EventArgs e)
        {
            SUAN.Text = "*";
        }
        private void div_Click_1(object sender, EventArgs e)
        {
            SUAN.Text = "/";
        }

       //实例对象
            Richnone ric = new Richnone();
            ric.X = double .Parse( richTextBox1.Text);//第一个数
            ric.Y = double.Parse(textBox2.Text);//第二个数
            ric.fuhao = SUAN.Text;//运算符号
            ric.result = result;//结果
            ric.Add();//加法
            ric.Sub();//减法
            ric.Mul();//乘法
            ric.Div();//除法
            //int sum;
            //sum = int.Parse(richTextBox1.Text) + int.Parse(textBox2.Text);

            if (e.KeyCode == Keys.Enter)
            {
                if (textBox5.Text == ric.result.ToString())
                {
                    right++;

                    MessageBox.Show("回答正确！");
                }
                else
                {
                    
                    MessageBox.Show("回答错误！");
                }
                Count++;
                richTextBox1.Clear();
                textBox2.Clear();
                textBox5.Clear();

            }
            
        }截图

 protected void Button1_Click(object sender, EventArgs e)
    {
        ric.X =double .Parse( TextBox1.Text);
        ric.Y =double .Parse( TextBox3.Text);
        ric.fuhao = DropDownList1.SelectedValue;
        ric.result = result;
        ric.Add();
        ric.Sub();
        ric.Mul();
        ric.Div();
        if (TextBox4.Text == ric.result.ToString())
        {
            Response.Write("<script>alert(‘回答正确‘)</script>");
        }
        else
        {
            Response.Write("<script>alert(‘回答错误‘)</script>");
        }
    }
    protected void DropDownList1_TextChanged(object sender, EventArgs e)
    {
        string fuhao = DropDownList1.SelectedValue;
        switch (fuhao)
        {
            case"+":
                DropDownList1.SelectedValue = "+";
                break;
            case"-":
                DropDownList1.SelectedValue = "-";
                break;
            case"*":
                DropDownList1.SelectedValue = "*";
                break;
            case"/":
                DropDownList1.SelectedValue = "/";
                break;
            default:
                break;
        }
    }



封装

public class Richnone
{
    public string fuhao;//计算符号
    public double result;


    private double x;//第一个数
    public double X
    {
        get { return x; }
        set { x = value; }
    }
    private double y;//第二个数
    public double Y
    {
        get { return y; }
        set { y = value; }
    }
    public void Add()//加法
    {
        if (fuhao == "+")
        {
            result = X + Y;
        }
    }
    public void Sub()
    {
        if (fuhao == "-")
        {
            result = X - Y;
        }
    }
    public void Mul()
    {
        if (fuhao == "*")
        {
            result = X * Y;
        }
    }
    public void Div()
    {
        if (fuhao == "/")
        {
            result = X / Y;
        }
    }
       
}



截图