Question

我在wpf中有两个自定义控件。一个是图表控件，另一个是循环进度条。图表控件具有以下相关代码。

>    public int BarValue { get; set; }
>    private void DrawData()
>         {
>             string data = File.ReadAllText(DataSource);
>             string[] valueData = data.Split(';');
>             string[] strValues = valueData[0].Split(',');
>             string[] strYear = valueData[1].Split(',');
>             double section = 525 / strValues.Length;
>             rectSpace = (section * 20) / 100;
>             rectWidth = (section * 80) / 100;
>          
> 
>             for (int i = 0; i < strYear.Length; i++)
>             {
>                
>                 Rectangle rec = new Rectangle();
>                 rec.Width = rectWidth;
>                rec.Height = Convert.ToDouble(strValues[i]);
>         
>                 rec.Margin = new Thickness((rectSpace), (350 - rec.Height), 
>     0,25);
>                 rec.Fill = BarsColor;
>                 panel.Children.Add(rec); rec.MouseDown += Rec_MouseDown; }  
     private void Rec_MouseDown(object sender,
>     MouseButtonEventArgs e)
>         {
>             BarValue =Convert.ToInt32( ((Rectangle)sender).Height);
>         }

然后ProgressBar有一个属性Value。我将两个控件添加到MainWindow。如果我点击一个上面提供的mouseDown事件的矩形，我怎么能改变ProgressBar的valueproperty。我试过了

progCircle.Value = chart.BarValue;

在mainWindow构造函数中。不工作。任何想法..谢谢

XML的主

<Grid Margin="1,0,-318,-30" HorizontalAlignment="Center"  Width="1418">
        <Rectangle x:Name="MainRec" RadiusX="9" RadiusY="9" Margin="25,38,425,51" Opacity="0.75">
            <Rectangle.Fill>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="Black" Offset="0"/>
                    <GradientStop Color="#FF0F2A3C" Offset="1"/>
                </LinearGradientBrush>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle x:Name="TitleBar" Fill="#FF070E17" HorizontalAlignment="Left" Height="40" Margin="25,38,0,0" RadiusY="9" RadiusX="9" VerticalAlignment="Top" Width="968" Opacity="0.75" MouseDown="TitleBar_MouseDown"/>
        <Label Content="Wools Valley" Foreground="Wheat" Margin="43,42,1225,565" Width="150" Height="30" FontSize="14"/>
        <Ellipse x:Name="closeButton" HorizontalAlignment="Left" Height="20" Margin="960,52,0,0" VerticalAlignment="Top" Width="20" MouseDown="closeButton_MouseDown"  Opacity="0.7" ToolTip="Close" RenderTransformOrigin="4.851,0.607">
            <Ellipse.Fill>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="DarkCyan"  Offset="0"/>
                    <GradientStop Color="Black" Offset="1"/>
                </LinearGradientBrush>
            </Ellipse.Fill>
            <Ellipse.Triggers>
                <EventTrigger RoutedEvent="UIElement.MouseEnter">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetName="closeButton"
                                             Storyboard.TargetProperty="Opacity" 
                                             From="0.7" To="1" Duration="0:0:1"/>
                        </Storyboard>

                    </BeginStoryboard>



      </EventTrigger>

    </Ellipse.Triggers>

</Ellipse>

<BarGraph2:BarGraph x:Name="bargraph" HorizontalAlignment="Left" Height="425" Margin="79,99,0,0" VerticalAlignment="Top" Width="654" DataSource="D:\\data3.txt" BarsColor="DarkCyan" AxisValueColor="Cyan" titleText="GDP Comparision" />
<ControlExamplesVS:ProgressCircle x:Name="progCircle" HorizontalAlignment="Left" Height="185" Margin="760,99,0,0" VerticalAlignment="Top" Width="184" IndicatorBrush="Cyan" BackgroundBrush="Transparent" ProgressBorderBrush="DarkCyan"/>
</Grid>

Answer 1

如果您想在后面的代码中执行此操作，请在MainWindow中添加控件后添加以下代码：

Binding bind= new Binding();
bind.Source = chart;
bind.Path = new PropertyPath("BarValue");
bind.Mode = BindingMode.TwoWay;
bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
BindingOperations.SetBinding(progCircle, CircuòarProgressBar.ValueProperty, bind);

如果您已将它们放在xaml中，则只需执行以下操作：

<CircularProgressBar Value="{Binding ElementName = chart, Path = Value}"/>
<Chart x:Name = "chart"/>

通过另一个的MouseDown事件更改一个Control的值

1 个答案: