我正在研究WPF计分应用程序。 UI到目前为止已完成，但我无法访问代码隐藏中的任何控件。这是XAML：
<Window x:Class="Scoreboard.MainScoreBoard"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="DartsLeague" Height="720" Width="1280">
<Grid x:Name="MainGrid" Background="DarkGreen">
<StackPanel x:Name="Player1" HorizontalAlignment="Left" VerticalAlignment="Stretch">
<Label x:Name="Player1Name" Style="{StaticResource PlayerName}"/>
<Label x:Name="Player1Score" Style="{StaticResource Score}"/>
<ScrollViewer x:Name="Player1Throws" Height="380" FlowDirection="RightToLeft">
</ScrollViewer>
</StackPanel>
<StackPanel x:Name="Player2" HorizontalAlignment="Right" VerticalAlignment="Stretch">
<Label x:Name="Player2Name" Style="{StaticResource PlayerName}">Player 2</Label>
<Label x:Name="Player2Score" Style="{StaticResource Score}">501</Label>
<ScrollViewer x:Name="Player2Throws" Height="380">
</ScrollViewer>
</StackPanel>
<StackPanel x:Name="Input" HorizontalAlignment="Center" VerticalAlignment="Top">
<TextBox x:Name="CurrentNumber" MaxLength="3" Width="160" Margin="20" FontSize="30" TextChanged="TextBox_TextChanged"></TextBox>
<Button x:Name="SubmitButton" IsDefault="True" Style="{StaticResource Golden} " Click="Button_Click">Запиши резултат</Button>
<Button x:Name="CancelButton" Style="{StaticResource Golden}">Върни назад</Button>
</StackPanel>
<Grid x:Name="StatsGrid" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="60" Width="560">
<StackPanel x:Name="Player1Stats" HorizontalAlignment="Left" VerticalAlignment="Stretch">
<Label x:Name="Player1Legs" Style="{StaticResource BoardStats}"/>
<Label x:Name="Player1Sets" Style="{StaticResource BoardStats}"/>
<Label x:Name="Player1Avr" Style="{StaticResource BoardStats}"/>
</StackPanel>
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Stretch">
<Label Style="{StaticResource BoardStats}">LEGS</Label>
<Label Style="{StaticResource BoardStats}">SETS</Label>
<Label Style="{StaticResource BoardStats}">3 DART AVERAGE</Label>
</StackPanel>
<StackPanel x:Name="Player2Stats" HorizontalAlignment="Right" VerticalAlignment="Stretch">
<Label x:Name="Player2Legs" Style="{StaticResource BoardStats}"/>
<Label x:Name="Player2Sets" Style="{StaticResource BoardStats}"/>
<Label x:Name="Player2Avr" Style="{StaticResource BoardStats}"/>
</StackPanel>
</Grid>
</Grid>
</Window>
的App.xaml：
<Application x:Class="Scoreboard.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Scoreboard"
StartupUri="StartWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<Style x:Key="Golden" TargetType="Button">
<Setter Property="Background" Value="Gold" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="Margin" Value="10" />
<Setter Property="Padding" Value="4" />
<Setter Property="FontSize" Value="30" />
</Style>
<Style x:Key="PlayerName" TargetType="Label">
<Setter Property="Background" Value="White" />
<Setter Property="Margin" Value="10"/>
<Setter Property="FontSize" Value="34" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="BorderThickness" Value="2" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
</Style>
<Style x:Key="Score" TargetType="Label">
<Setter Property="Margin" Value="10" />
<Setter Property="Background" Value="White" />
<Setter Property="FontSize" Value="160" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="BorderThickness" Value="2" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
</Style>
<Style x:Key="BoardStats" TargetType="Label">
<Setter Property="Background" Value="Beige" />
<Setter Property="Margin" Value="4" />
<Setter Property="BorderBrush" Value="DarkRed" />
<Setter Property="BorderThickness" Value="4" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="FontSize" Value="26" />
<Setter Property="Padding" Value="8" />
</Style>
</ResourceDictionary>
</Application.Resources>
</Application>
继承C＃代码，它可能有更多我知道的错误，但它不会编译，因为它无法识别XAML中的任何名称：
namespace Scoreboard
{
public partial class MainScoreBoard : Window
{
public MainScoreBoard()
{
InitializeComponent();
}
static bool IsTextAllowed(string text, int num)
{
Regex regex = new Regex("[^0-9.-]+");
if (!regex.IsMatch(text))
{
num = Int32.Parse(text);
return true;
}
else return false;
}
void TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
}
void Button_Click(object sender, RoutedEventArgs e)
{
// You should get in the habit of initializing your variables
int currentScore = 0, currentPlayerScore, currentResult, legs, sets;
bool Player1Turn = true;
// You were getting null reference exceptions from attempting to access the Content property
// without them ever getting set. You can initialize them with default values in the xaml or in the
// constructor on initialization (After InitializeComponent() call).
if (Player1Score.Content != null && Player2Score.Content != null)
{
bool isGameOver = false;
// This will loop infinitely if you don't fix the bugs in calculating the score, I put a comment on it as you are not getting a value for currentScore from anywhere
while (Int32.Parse(Player1Score.Content.ToString()) != 0 || Int32.Parse(Player2Score.Content.ToString()) != 0)
{
if (IsTextAllowed(CurrentNumber.Text, currentScore))
{
if (currentScore > 180)
{
MessageBox.Show("Написаното е над 180!!!");
continue;
}
if (Player1Turn)
{
Player1Turn = false;
currentPlayerScore = Int32.Parse(Player1Score.Content.ToString());
// The currentScore variable is never getting set, I initialized it for you but
// it needs to be assigned a value from somewhere otherwise it will always be
// currentResult = currentPlayerScore - 0
currentResult = currentPlayerScore - currentScore;
if (currentResult < 0)
{
MessageBox.Show("Предобри!!!");
continue;
}
else if (currentResult == 0)
{
MessageBox.Show("Game Over!!!");
legs = Int32.Parse(Player1Legs.Content.ToString());
legs++;
Player1Legs.Content = legs.ToString();
if (legs == 3)
{
//increas sets
//if sets == 3, end game and shut down app
}
//Application.Current.Shutdown();
// Set flag so we do not keep looping through game over code
isGameOver = true;
}
Player1Score.Content = currentResult.ToString();
// Added this check here because I'm assuming you would want Player1Score to be reflected first
// before exiting the loop.
if (isGameOver)
{
// game is over, we do not want to keep showing the Game Over message box
break;
}
}
else
{
//the same for Player2
Player1Turn = true;
}
}
}
}
}
}
}
所有控件上都有x:Name，但我只能访问其中的2个，即使我可以，也没有任何反应。我想在文本框中编写文本，在对文本框进行一些处理之后，一些输出和统计数据应该显示在标签上，但它不会让我访问任何一个，或者如果它，它是随机，没有任何反应，好像那里没有代码。
答案 0 :(得分：0)
我无法在xaml中看到您的Window声明的代码。但是，由于您重命名了命名空间和类，因此您应该在xaml窗口声明中使用它。
x:Class="Scoreboard.MainScoreBoard"
基本上你的xaml应该是这样的
<Window x:Class="Scoreboard.MainScoreBoard"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
</Window>
你需要在后面的代码中有更多错误，因为你需要在几个地方调用.ToString（）以及一些空引用异常，但是如果你陷入困境，你总是可以发布一个新问题。 / p>
public partial class MainScoreBoard : Window
{
public MainScoreBoard()
{
InitializeComponent();
}
static bool IsTextAllowed(string text, int num)
{
Regex regex = new Regex("[^0-9.-]+");
if (!regex.IsMatch(text))
{
num = Int32.Parse(text);
return true;
}
else return false;
}
void TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
}
void Button_Click(object sender, RoutedEventArgs e)
{
// You should get in the habit of initializing your variables
int currentScore = 0, currentPlayerScore, currentResult, legs, sets;
bool Player1Turn = true;
// You were getting null reference exceptions from attempting to access the Content property
// without them ever getting set. You can initialize them with default values in the xaml or in the
// constructor on initialization (After InitializeComponent() call).
if (Player1Score.Content != null && Player2Score.Content != null)
{
bool isGameOver = false;
// This will loop infinitely if you don't fix the bugs in calculating the score, I put a comment on it as you are not getting a value for currentScore from anywhere
while (Int32.Parse(Player1Score.Content.ToString()) != 0 || Int32.Parse(Player2Score.Content.ToString()) != 0)
{
if (IsTextAllowed(CurrentNumber.Text, currentScore))
{
if (currentScore > 180)
{
MessageBox.Show("Написаното е над 180!!!");
continue;
}
if (Player1Turn)
{
Player1Turn = false;
currentPlayerScore = Int32.Parse(Player1Score.Content.ToString());
// The currentScore variable is never getting set, I initialized it for you but
// it needs to be assigned a value from somewhere otherwise it will always be
// currentResult = currentPlayerScore - 0
currentResult = currentPlayerScore - currentScore;
if (currentResult < 0)
{
MessageBox.Show("Предобри!!!");
continue;
}
else if (currentResult == 0)
{
MessageBox.Show("Game Over!!!");
legs = Int32.Parse(Player1Legs.Content.ToString());
legs++;
Player1Legs.Content = legs.ToString();
if (legs == 3)
{
//increas sets
//if sets == 3, end game and shut down app
}
//Application.Current.Shutdown();
// Set flag so we do not keep looping through game over code
isGameOver = true;
}
Player1Score.Content = currentResult.ToString();
// Added this check here because I'm assuming you would want Player1Score to be reflected first
// before exiting the loop.
if (isGameOver)
{
// game is over, we do not want to keep showing the Game Over message box
break;
}
}
else
{
//the same for Player2
Player1Turn = true;
}
}
}
}
}
}
在实现样式之前，xaml中的那些样式不会定义在应删除它们的任何位置。我在编译时删除了它们，因为它们没有定义。
<Window x:Class="Scoreboard.MainScoreBoard"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Scoreboard"
Title="DartsLeague" Height="720" Width="1280">
<Grid x:Name="MainGrid" Background="DarkGreen">
<StackPanel x:Name="Player1" HorizontalAlignment="Left" VerticalAlignment="Stretch">
<Label x:Name="Player1Name"/>
<Label x:Name="Player1Score">501</Label>
<ScrollViewer x:Name="Player1Throws" Height="380" FlowDirection="RightToLeft">
</ScrollViewer>
</StackPanel>
<StackPanel x:Name="Player2" HorizontalAlignment="Right" VerticalAlignment="Stretch">
<Label x:Name="Player2Name">Player 2</Label>
<Label x:Name="Player2Score">501</Label>
<ScrollViewer x:Name="Player2Throws" Height="380">
</ScrollViewer>
</StackPanel>
<StackPanel x:Name="Input" HorizontalAlignment="Center" VerticalAlignment="Top">
<TextBox x:Name="CurrentNumber" MaxLength="3" Width="160" Margin="20" FontSize="30" TextChanged="TextBox_TextChanged"></TextBox>
<Button x:Name="SubmitButton" IsDefault="True" Click="Button_Click">Запиши резултат</Button>
<Button x:Name="CancelButton">Върни назад</Button>
</StackPanel>
<Grid x:Name="StatsGrid" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="60" Width="560">
<StackPanel x:Name="Player1Stats" HorizontalAlignment="Left" VerticalAlignment="Stretch">
<Label x:Name="Player1Legs">0</Label>
<Label x:Name="Player1Sets" />
<Label x:Name="Player1Avr" />
</StackPanel>
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Stretch">
<Label>LEGS</Label>
<Label>SETS</Label>
<Label>3 DART AVERAGE</Label>
</StackPanel>
<StackPanel x:Name="Player2Stats" HorizontalAlignment="Right" VerticalAlignment="Stretch">
<Label x:Name="Player2Legs"/>
<Label x:Name="Player2Sets"/>
<Label x:Name="Player2Avr" />
</StackPanel>
</Grid>
</Grid>