这个数据绑定(bind)让我很困惑。我正在尝试将按钮的文本绑定(bind)到我的玩家生活的文本。我关注了其他一些文章，并认为我把它放下了，应用程序运行但按钮文本仍然空白。这是我的 XAML:
<Page.DataContext>
<local:Player x:Name="PlayerCur"></local:Player>
</Page.DataContext>
<Grid Background="#FFFFFFFF">
<StackPanel Margin="0,0,181,0">
<TextBlock x:Name="LifeTitle" TextAlignment="Center" FontSize="40" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" TextWrapping="Wrap" Text="Life" Height="56" Width="139"/>
<Button Name="Life" Content="{Binding PlayerLife}" FontSize="50" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" Height="126" Width="139">
<Button.Flyout>
<MenuFlyout>
<MenuFlyoutItem Text="Reset Life" Click="Reset_Life_Click"/>
<MenuFlyoutSeparator/>
<MenuFlyoutSubItem x:Name="lAdd" Text="Heal" >
<MenuFlyoutItem x:Name="lAddone" Text="+1" Click="Add_OneL_Click"/>
<MenuFlyoutItem x:Name="lAddfive" Text="+5" Click="Add_FiveL_Click"/>
<MenuFlyoutItem x:Name="lAddten" Text="+10" Click="Add_TenL_Click"/>
</MenuFlyoutSubItem>
<MenuFlyoutSubItem x:Name="lSubtract" Text="Deal Damage">
<MenuFlyoutItem x:Name="lSubone" Text="-1" Click="Sub_OneL_Click"/>
<MenuFlyoutItem x:Name="lSubthree" Text="-5" Click="Sub_FiveL_Click"/>
<MenuFlyoutItem x:Name="lSubfive" Text="-10" Click="Sub_TenL_Click"/>
</MenuFlyoutSubItem>
<MenuFlyoutSeparator></MenuFlyoutSeparator>
</MenuFlyout>
</Button.Flyout>
</Button>
</StackPanel>
这是播放器类:
namespace App1.Classes
{
public class Player: INotifyPropertyChanged
{
private string _PlayerLife;
private string _PlayerPoison;
private int _life = 20;
private int _poison = 0;
public string PlayerLife
{
get { return _PlayerLife; }
}
public string PlayerPoison
{
get { return _PlayerPoison; }
}
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
public void reset(int destination)
{
if(destination==0)
{
_life = 20;
OnPropertyChanged("Life");
}
else if(destination==1)
{
_poison = 0;
OnPropertyChanged("Poison");
}
else
{
}
}
public void incrementer(int destination,int modifier)
{
if(destination==0)
{
_life = _life + modifier;
_PlayerLife = _life.ToString();
OnPropertyChanged("life");
}
else if(destination==1)
{
_poison = _poison + modifier;
_PlayerPoison = _poison.ToString();
OnPropertyChanged("poison");
}
else
{
}
}
}
我觉得问题在于我的类在生命和毒药发生变化时没有通知 XAML。
非常感谢任何建议/指示。
最佳答案
真正的简单。
只需输入 Content="{Binding PlayerLife, **Mode=TwoWay**}"
(那些星号只是用来表示新代码，不要真正把它们放进去)
关于c# - 如何使用 XAML/C# 在我的 UWP 应用程序中允许双向数据绑定(bind)？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44488607/