1

我已经构建了一个SpinButton用户控件。 SpinButton.xaml有:Silverlight UserControl绑定抛出一个XamlParseException,AG_E_PARSER_BAD_PROPERTY_VALUE

<UserControl x:Class="MyApp.SpinButton" x:Name="Spinner" 
    [...] 
    > 

    <Grid x:Name="LayoutRoot"> 
     <StackPanel Margin="8,8,8,0" VerticalAlignment="Top" Orientation="Horizontal"> 
      <TextBox x:Name="Text" TextWrapping="Wrap" Text="{Binding Count, Mode=TwoWay, ElementName=Spinner}" TextAlignment="Center" Width="120" InputScope="TelephoneNumber"/> 
      <Button x:Name="PlusButton" Content="+" BorderThickness="3,3,0,3" Margin="-12,0,0,0" Width="55" Click="PlusButton_Click" Padding="0" Style="{StaticResource ButtonStyle}" /> 
      <Button x:Name="MinusButton" Content="-" Width="55" Click="MinusButton_Click" Padding="0" Style="{StaticResource ButtonStyle}" /> 
     </StackPanel> 
    </Grid> 
</UserControl> 

而且SpinButton.xaml.cs有

public partial class SpinButton : UserControl, INotifyPropertyChanged 
{ 
    private int count, min, max; 

    public int Count 
    { 
     get { return count; } 
     set { count = value; Changed("Count"); } 
    } 

    public int Min 
    { 
     get { return min; } 
     set { min = value; Changed("Min"); Changed("Count"); } 
    } 

    public int Max 
    { 
     get { return max; } 
     set { max = value; Changed("Max"); Changed("Count"); } 
    } 

    public SpinButton() 
    { 
     InitializeComponent(); 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 

    private void Changed(string property) 
    { 
     if (Count < Min) Count = Min; 
     if (Count > Max) Count = Max; 

     if (PropertyChanged != null) 
     { 
      PropertyChanged(this, new PropertyChangedEventArgs(property)); 
     } 
    } 

    private void PlusButton_Click(object sender, RoutedEventArgs e) 
    { 
     Count++; 
    } 

    private void MinusButton_Click(object sender, RoutedEventArgs e) 
    { 
     Count--; 
    } 
} 

我想用在页面此控制。这完美的作品:

<local:SpinButton Count="20" Min="0" Max="255" /> 

但这并不:

<local:SpinButton Count="{Binding SomeIntProperty}" Min="0" Max="255" /> 

所有我得到的是错误AG_E_PARSER_BAD_PROPERTY_VALUE一个XamlParseException分配计数属性时。

任何想法什么可能是错的,我该如何解决它?

回答

3

我相信计数需要是DependencyProperty才能支持数据绑定。

+0

谢谢!这解决了它:) – 2011-03-16 18:22:46

1

将计数更改为依赖项属性...应该有所帮助。

自定义控件的可绑定属性应该是依赖项属性。

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