我有2个文本字段代表Xmin和Xmax四边形的值，此值初始化的构造函数为myClass。更新2个字段取决于每个其他值，但每个也取决于其他属性值

我也有2个领域，Delta和Counter，这取决于Xmin和Xmax他们必须使用公式更新：

this.Delta = (int)((this.Xmax - this.Xmin)/(this.Counter - 1));

和

this.Counter = ((this.Xmax - this.Xmin)/(this.Delta)) + 1 ;

这似乎不是什么难事，但是我想允许Delta和Counter更新，如果其他更改，即如果Delta更改然后Counter更新ES，反之亦然，这一切考虑Xmin和Xmax值

这里是我有

WPF

<GroupBox Header="Values" Height="93" HorizontalAlignment="Left" Margin="4,3,0,0" Name="GBoxGridDefinition" VerticalAlignment="Top" Width="624"> 
<Grid> 
    <TextBlock Height="20" Margin="20,13,0,0" Name="TbXmin" Text="Xmin:" Width="36" />       
    <controls:WaterMarkNumericInput x:Name="TBXmin" Height="20" Width="89" Margin="59,9,0,0" Style="{StaticResource goStRWMNI}" Number="{Binding Path=Xmin, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True,NotifyOnValidationError=True}" IsNullAllowed="False" /> 
    <TextBlock Height="20" Margin="154,10,0,0" Name="TbXmax" Text="Xmax:" Width="36" />       
    <controls:WaterMarkNumericInput x:Name="TBXmax" Height="20" Width="89" Margin="198,10,0,0" Style="{StaticResource goStRWMNI}" Number="{Binding Path=Xmax, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True,NotifyOnValidationError=True}" IsNullAllowed="False" /> 
</Grid> 
</GroupBox> 
<GroupBox Header="Dynamic changes" Height="77" HorizontalAlignment="Left" Margin="5,98,0,0" Name="GbxNodes" VerticalAlignment="Top" Width="463" > 
<Grid> 
    <TextBlock Height="20" Margin="28,7,0,0" Name="TbDelta" Text="Delta X:" Width="48" />       
    <controls:WaterMarkNumericInput x:Name="TBDelta" Height="20" Width="119" IsNegativeSignAllowed="False" Margin="90,4,0,0" Style="{StaticResource goStRWMNI}" Number="{Binding Path=Delta, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, NotifyOnValidationError=True}" IsNullAllowed="False"/> 
    <TextBlock Height="20" Margin="223,6,0,0" Name="TbCounter" Text="XX' nodes counter:" Width="109" /> 
    <controls:WaterMarkNumericInput x:Name="TBCounter" IsEnabled="False" Height="20" Width="111" Margin="330,4,0,0" Style="{StaticResource goStRWMNI}" Number="{Binding Path=Counter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True,NotifyOnValidationError=True}" IsNullAllowed="False" /> 
</Grid> 
</GroupBox>

我已经加入绑定和性能变化，在开始的时候Counter = 100，但我不知道如何更新Counter当Delta更改并反之亦然

这里是c＃代码

public partial class myClass : UserControl 
{ 
    double gnXmin, gnXmax, gnCounter; 
    int gnDelta; 
    public event PropertyChangedEventHandler PropertyChanged; 
    public double Xmin 
    { 
     get { return gnXmin; } 
     set { gnXmin = value; OnPropertyChanged("Xmin"); } 
    } 
    public double Xmax 
    { 
     get { return gnXmax; } 
     set { gnXmax = value; OnPropertyChanged("Xmax"); } 
    } 
    public int Delta 
    { 
     get { return gnDelta; } 
     set { gnDelta = value; OnPropertyChanged("Delta"); } 
    } 
    public double Counter 
    { 
     get { return gnCounter; } 
     set { gnCounter = value; OnPropertyChanged("Counter"); } 
    } 
    public myClass(double _Xmin, double _Xmax) 
    { 
     this.Xmin = _Xmin; 
     this.Xmax = _Xmax; 
     this.Counter = 100; 
     this.Delta = (int)((this.Xmax - this.Xmin)/(this.Counter - 1)); 
    } 
    void OnPropertyChanged(string prop) 
    { 
     if (this.PropertyChanged != null) 
      PropertyChanged(this, new PropertyChangedEventArgs(prop)); 
    } 

}

我怎样才能更新两个要素或结合他们，让其他的时候被修改，但考虑Xmin和Xmax性质每一个被修改？

我试图把更新代码中的getter和setter，但作为一个字段取决于Xmin和Xmax我得到一个无限循环的例外......

来源

2014-06-12 cMinor

为了避免无限循环，在做任何事情之前请确保通过value真的是从二传手的当前值不同，：

public double Counter 
{ 
    get { ... } 
    set 
    { 
     if (gnCounter != value) 
     { 
      gnCounter = value; 
      Delta = (int)((Xmax - Xmin)/(gnCounter - 1)); 
      OnPropertyChanged("Counter"); 
     } 
    } 
}

当然，您必须对Delta属性也做同样的事情。

来源

2014-06-12 19:30:18

回答这个问题“如何更新Counter在三角洲改变，反之亦然？？” Delta值更改时通知计数器，计数器更改时通知Delta。如果此解决方案犯规帮助，然后让我知道

public int Delta 
    { 
     get { return gnDelta; } 
     set { gnDelta = value; 
       OnPropertyChanged("Delta"); 
       OnPropertyChanged("Counter");} 
    } 
    public double Counter 
    { 
     get { return gnCounter; } 
     set { gnCounter = value; 
      OnPropertyChanged("Counter"); 
      OnPropertyChanged("Delta"); } 
    }

来源

2014-06-12 19:26:14 Sivasubramanian

更新2个字段取决于每个其他值，但每个也取决于其他属性值

WPF

回答

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