Question

我在c＃中很新！任何人都可以帮我如何在WPF中创建的计算器中添加一个sqrt按钮。我在这里粘贴的代码工作正常，但我必须添加另一个应该是平方根的按钮，但我不知道该怎么做。请任何人帮助我，我真的很感激

using System;
using System.Windows;
using System.Windows.Controls;

namespace MyCalculatorv1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        // all button 0 to 9 go here. 
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            Button b = (Button) sender;
            tb.Text += b.Content.ToString();
        }

        // equal button goes here
        private void Result_click(object sender, RoutedEventArgs e)
        {
            try
            {
                result();
            }
            catch (Exception err)
            {
                tb.Text = "Error!";
            }
        }

        private void result()
        {
            String op;
            int iOp = 0;
            if (tb.Text.Contains("+"))
            {
                iOp = tb.Text.IndexOf("+");
            }
            else if (tb.Text.Contains("-"))
            {
                iOp = tb.Text.IndexOf("-");
            }
            else if (tb.Text.Contains("*"))
            {
                iOp = tb.Text.IndexOf("*");
            }
            else if (tb.Text.Contains("/"))
            {
                iOp = tb.Text.IndexOf("/");
            }
            else
            {
                //error
            }

            op = tb.Text.Substring(iOp, 1);
            double op1 = Convert.ToDouble(tb.Text.Substring(0, iOp));
            double op2 = Convert.ToDouble(tb.Text.Substring(iOp + 1, tb.Text.Length - iOp - 1));

            if (op == "+")
            {
                tb.Text += "=" + (op1 + op2);
            }
            else if (op == "-")
            {
                tb.Text += "=" + (op1 - op2);
            }
            else if (op == "*")
            {
                tb.Text += "=" + (op1 * op2);
            }
            else
            {
                tb.Text += "=" + (op1 / op2);
            }
        }

        private void Off_Click_1(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown();
        }

        private void Del_Click(object sender, RoutedEventArgs e)
        {
            tb.Text = "";
        }

        private void R_Click(object sender, RoutedEventArgs e)
        {
            if (tb.Text.Length > 0)
            {
                tb.Text = tb.Text.Substring(0, tb.Text.Length - 1);
            }
        }

        private void about(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("simple calculator");
        }
    }
}

Answer 1

Math.Sqrt

XAML：

<Grid>
    <Button Content="&#8730;" HorizontalAlignment="Left" Margin="145,10,0,0" VerticalAlignment="Top" Width="75" 
            Click="OnSquareRootClick"/>
    <TextBox x:Name="txtNumber" HorizontalAlignment="Left" Height="23" Margin="10,10,0,0" Text="" VerticalAlignment="Top" Width="120"/>
    <TextBox x:Name="txtResult" HorizontalAlignment="Left" Height="23" Margin="240,10,0,0" Text="" VerticalAlignment="Top" Width="120"/>
</Grid>

代码背后：

 private void OnSquareRootClick(object sender, RoutedEventArgs e)
    {
        double number;
        var isDouble = double.TryParse(this.txtNumber.Text, out number);
        if (isDouble)
        {
            this.txtResult.Text =
                string.Format(
                    "{0}{1} = {2}", 
                    "\u221A", 
                    this.txtNumber.Text, 
                    Math.Round(Math.Sqrt(number), 2));
        }
    }

如何在WPF计算器中添加sqrt c＃

1 个答案: