无法找出问题出在哪里 [英] Can't figure out where the problem is with calculation
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问题描述
我不知道为什么我的代码没有计算.当我输入并选择每个输入后按提交按钮时，它甚至不会显示任何内容甚至错误.
I can't figure out why my code is not calculating. when i press submit button after entering and selecting each input it doesn't show up anything not even error.
下面的xaml文件内容.
xaml file content below.
<Window x:Class="MortgageCalculator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Mortgage Calculator"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="625" HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid x:Name="lblintratevalue" HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="162"></ColumnDefinition>
<ColumnDefinition Width="Auto" MinWidth="416"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="41"></RowDefinition>
<RowDefinition Height="152"></RowDefinition>
<RowDefinition Height="62"></RowDefinition>
<RowDefinition Height="83"></RowDefinition>
<RowDefinition Height="50"></RowDefinition>
</Grid.RowDefinitions>
<Label x:Name="lblprincipal" Grid.Column="0" Grid.Row="0" Content="Principal Amount:" FontFamily="Arial" FontSize="14.667" FontWeight="Bold" Margin="0,6,6,9" Width="136" VerticalAlignment="Center" HorizontalAlignment="Right" Height="26"/>
<TextBox x:Name="txtprincipal" Grid.Column="1" HorizontalAlignment="Left" Height="28" TextWrapping="Wrap" Text="" VerticalAlignment="Center" Width="184" FontFamily="Gadugi" FontSize="14.667" BorderThickness="1.5" Margin="10,6,0,7" ToolTip="Pricipal" UndoLimit="95"/>
<Label x:Name="lblyears" Content="Number of Years:" Grid.Row="1" FontFamily="Arial" FontSize="14.667" FontWeight="Bold" Margin="0,45,10,81" Width="132" VerticalAlignment="Center" HorizontalAlignment="Right" Height="26" />
<StackPanel x:Name="stkrdobtns" Grid.Column="1" HorizontalAlignment="Left" Height="99" Margin="10,32,0,21" Grid.Row="1" VerticalAlignment="Center" Width="184">
<RadioButton x:Name="rad10years" Content="10" FontSize="14.667" HorizontalAlignment="Left" VerticalAlignment="Center" BorderThickness="1.5" FontFamily="Arial"/>
<RadioButton x:Name="rad20years" Content="20" FontSize="14.667" HorizontalAlignment="Left" VerticalAlignment="Center" BorderThickness="1.5" FontFamily="Arial"/>
<RadioButton x:Name="rad30years" Content="30" FontSize="14.667" HorizontalAlignment="Left" VerticalAlignment="Center" BorderThickness="1.5" FontFamily="Arial"/>
<RadioButton x:Name="radother" Content="Other" FontSize="14.667" HorizontalAlignment="Left" VerticalAlignment="Center" BorderThickness="1.5" FontFamily="Arial" Width="76"/>
<TextBox x:Name="txtother" HorizontalAlignment="Left" Height="23" Margin="20,0,0,0" TextWrapping="Wrap" Text="Enter Year" Width="128" FontFamily="Arial" FontSize="14.667"/>
</StackPanel>
<Label x:Name="lblinterestrate" Content="Interest Rate:" Grid.Row="2" FontFamily="Arial" FontSize="14.667" FontWeight="Bold" Margin="0,15,10,21" Width="132" VerticalAlignment="Center" HorizontalAlignment="Right" Height="26" HorizontalContentAlignment="Right" VerticalContentAlignment="Center" />
<Slider x:Name="sldinterest" Grid.Column="1" HorizontalAlignment="Left" Height="27" Margin="10,10,0,0" Grid.Row="2" VerticalAlignment="Top" Width="276" Background="{x:Null}" Ticks="0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5" AutoToolTipPlacement="BottomRight" Minimum="0.5" Maximum="5" IsHitTestVisible="True" FontSize="13.333" FontFamily="Arial" Cursor="Arrow" TickPlacement="BottomRight" SelectionEnd="1" UseLayoutRounding="False" IsSnapToTickEnabled="True" ValueChanged="sldvalue_changed" Foreground="Black" TickFrequency="0.5" LargeChange="0.5">
<Slider.Effect>
<DropShadowEffect BlurRadius="2" Color="#FF8F8C8C" ShadowDepth="3"/>
</Slider.Effect>
</Slider>
<Label x:Name="lblintratedisplay" Content="0.5" Grid.Column="1" HorizontalAlignment="Left" Height="31" Margin="306,6,0,0" Grid.Row="2" VerticalAlignment="Top" Width="53" FontFamily="Arial" FontSize="13.333"/>
<Button x:Name="btnsubmit" Content="Submit" Grid.Column="1" HorizontalAlignment="Left" Height="58" Margin="10,15,0,0" Grid.Row="3" VerticalAlignment="Top" Width="165" FontFamily="Arial" FontSize="16" FontWeight="Bold" Background="{x:Null}" Click="btnsubmit_Click">
<Button.Effect>
<DropShadowEffect BlurRadius="2" Color="#FF7E7979" ShadowDepth="2"/>
</Button.Effect>
</Button>
</Grid>
</Window>
.CS文件的内容
.CS file content below
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace MortgageCalculator
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
double principal;
double years;
double rate = .5;
//Slider text box value display
private void sldvalue_changed(object sender, RoutedPropertyChangedEventArgs<double> e)
{
if (lblintratedisplay != null)
{
lblintratedisplay.Content = sldinterest.Value.ToString();
rate = sldinterest.Value;
}
}
private void btnsubmit_Click(object sender, RoutedEventArgs e)
{
double monthlypayment;
{
//Tryparse for principal amount with error Red texbox
if (String.IsNullOrEmpty(txtprincipal.Text) || !double.TryParse(txtprincipal.Text, out principal))
{
txtprincipal.BorderBrush = new SolidColorBrush(Colors.Red);
return;
}
else
txtprincipal.BorderBrush = new SolidColorBrush(Colors.Black);
//Validate radio button
if (rad10years.IsChecked.Value)
{
years = 10;
return;
}
else if (rad20years.IsChecked.Value)
{
years = 20;
return;
}
else if (rad30years.IsChecked.Value)
{
years = 30;
return;
}
else if (radother.IsChecked == true)
{
if (!double.TryParse(txtother.Text, out years))
{
MessageBox.Show("Not a Valid year.");
}
return;
}
else
{
MessageBox.Show("Please select number of years.");
stkrdobtns.Background = new SolidColorBrush(Colors.Red);
return;
}
double monthlypayment = ((principal * rate) / 1200) / Math.Pow(1 - (1.0 + rate / 1200), (-12.0 * years));
string MonthPay = string.Format("The amount of the monthly payment is: {0:c}", monthlypayment);
MessageBox.Show(MonthPay);
}
}
}
}
推荐答案
正如我在 btnsubmit_Click 中看到的那样，您有一个if语句来验证单选按钮，但是有一个 在所有情况下都返回，这意味着if语句之后的所有内容均无法访问；因为return语句终止了该方法的执行.
As I can see in btnsubmit_Click you have an if statement to validate radio buttons however there is a return in all cases which means that every thing after the if statement will not be reachable; because return statement terminates execution of the method.
//Validate radio button
if (rad10years.IsChecked.Value)
{
years = 10;
}
else if (rad20years.IsChecked.Value)
{
years = 20;
}
else if (rad30years.IsChecked.Value)
{
years = 30;
}
else if (radother.IsChecked == true)
{
if (!double.TryParse(txtother.Text, out years))
{
MessageBox.Show("Not a Valid year.");
}
return;
}
else
{
MessageBox.Show("Please select number of years.");
stkrdobtns.Background = new SolidColorBrush(Colors.Red);
return;
}
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票价
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