C# 如何：获取WPF中的网格大小（以像素为单位）
我在主页上使用一个包含3个数据透视项的数据透视 每个数据透视项中都有一个网格。其中一个我想画一个液压回路。因此，我插入了一些列和行，使每个元素在单元格中都有一个固定的位置。我需要知道网格的大小，因为根据这个大小，线（表示电路的管道）位于单元的中间，并且具有单元的半长度（或取决于方向的高度）。 。当Raspberry 3连接到另一个显示器时，有些线路不在正确的位置 此外，屏幕上没有完全填充网格，如图所示。回路下仍有一些空白，但在相同的设置下，其他数据透视项上不会出现这种情况 当我想得到一个单元格的大小时（所有单元格都有相同的大小！使用 *)使用： 我得到的结果是0 当我改用：C# 如何：获取WPF中的网格大小（以像素为单位）,c#,wpf,raspberry-pi3,windowsiot,windows-iot-core-10,C#,Wpf,Raspberry Pi3,Windowsiot,Windows Iot Core 10,我在主页上使用一个包含3个数据透视项的数据透视 每个数据透视项中都有一个网格。其中一个我想画一个液压回路。因此，我插入了一些列和行，使每个元素在单元格中都有一个固定的位置。我需要知道网格的大小，因为根据这个大小，线（表示电路的管道）位于单元的中间，并且具有单元的半长度（或取决于方向的高度）。 。当Raspberry 3连接到另一个显示器时，有些线路不在正确的位置 此外，屏幕上没有完全填充网格，如图所示。回路下仍有一些空白，但在相同的设置下，其他数据透视项上不会出现这种情况 当我想得到一个单元格的
double columnWidth = circuitGrid.ColumnDefinitions[0].Width;
var circuitGridSize = new Size(circuitGrid.ActualWidth, circuitGrid.ActualHeight);
- 使用UI元素属性Height和ActualHeight
- 使用具有和不具有大小类型的属性
- 将initCircuit函数放入几个加载的事件中
<Page
x:Class="I2cPortExpander.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:I2cPortExpander"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Margin="0">
<StackPanel>
<Pivot Margin="0" Height="769" >
<PivotItem x:Name="AutoMode1" Header="Automatikbetrieb" Margin="0">
<FlipView>
<FlipViewItem>
<Grid x:Name="Auto1Grid" Background="LightGray" Visibility="Visible">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock Text="Anzahl der zu prüfenden Kreisläufe:" Style="{ThemeResource BaseTextBlockStyle}"/>
<RadioButton x:Name="Option1Cycle" Content="1" HorizontalAlignment="Center" Checked="Option1Cycle_Checked"/>
<RadioButton x:Name="Option2Cycle" Content="2" HorizontalAlignment="Center" Checked="Option2Cycle_Checked"/>
<RadioButton x:Name="Option3Cycle" Content="3" HorizontalAlignment="Center" Checked="Option3Cycle_Checked"/>
</StackPanel>
</Grid>
</FlipViewItem>
<FlipViewItem>
<Grid x:Name="Auto2Grid" Background="LightGray" Visibility="Visible">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock TextWrapping="Wrap" Text="Festlegen der Zeiten der Prüfschritte in Minuten " Margin="0,0,0,20" FontSize="20"/>
<TextBlock x:Name="airTimeText" TextWrapping="Wrap" Text="Druckprüfung mit Luft: 0 Minuten" />
<Slider x:Name="airTimeSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="10" Maximum="100" TickPlacement="BottomRight" ValueChanged="airTimeSlider_ValueChanged" />
<TextBlock x:Name="cleanTimeText" TextWrapping="Wrap" Text="Spülgang: 0 Minuten"/>
<Slider x:Name="cleanTimeSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="10" Maximum="100" TickPlacement="BottomRight" ValueChanged="cleanTimeSlider_ValueChanged"/>
<TextBlock x:Name="oilTimeText" TextWrapping="Wrap" Text="Drückprüfung mit Öl: 0 Minuten"/>
<Slider x:Name="oilTimeSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="10" Maximum="100" TickPlacement="BottomRight" ValueChanged="oilTimeSlider_ValueChanged"/>
<TextBlock x:Name="flowRateTimeText" TextWrapping="Wrap" Text="Durchflussmessung: 0 Minuten"/>
<Slider x:Name="flowRateTimeSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="10" Maximum="100" TickPlacement="BottomRight" ValueChanged="flowRateTimeSlider_ValueChanged"/>
<TextBlock x:Name="blowTimeText" TextWrapping="Wrap" Text="Ausblasen: 0 Minuten"/>
<Slider x:Name="blowTimeSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="10" Maximum="100" TickPlacement="BottomRight" ValueChanged="blowTimeSlider_ValueChanged"/>
</StackPanel>
</Grid>
</FlipViewItem>
<FlipViewItem>
<Grid x:Name="Auto3Grid" Background="LightGray" Visibility="Visible">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBlock TextWrapping="Wrap" Text="Festlegen der Druckparameter in Bar " Margin="0,0,0,20" FontSize="20"/>
<TextBlock x:Name="desiredPressure" TextWrapping="Wrap" Text="Druckprüfung mit: 0 Bar" />
<Slider x:Name="desiredPressureSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="2" Maximum="20" TickPlacement="BottomRight" ValueChanged="desiredPressureSlider_ValueChanged" />
<TextBlock x:Name="breakPressure" TextWrapping="Wrap" Text="Maximaler Druckverlust während Prüfung: 0 Bar"/>
<Slider x:Name="breakPressureSlider" HorizontalAlignment="Center" VerticalAlignment="Top" Width="500" Margin="0,0,0,20" TickFrequency="1" Maximum="10" TickPlacement="BottomRight" ValueChanged="breakPressureSlider_ValueChanged"/>
<Grid>
<Button x:Name="Automatik3_Start" Content="Start" HorizontalAlignment="Right" VerticalAlignment="Stretch" Margin="10" Width="75" Click="Automatik3_Start_Click"/>
</Grid>
</StackPanel>
</Grid>
</FlipViewItem>
</FlipView>
</PivotItem>
<PivotItem x:Name="HandModus" Header="Handbetrieb" Margin="0">
<Grid x:Name="circuitGrid" Background="LightGray" Visibility="Visible" Margin="0" >
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Ellipse x:Name="pneuConOuterCirc" Grid.Column="0" Grid.Row="1" Stroke="Black" HorizontalAlignment="Center" VerticalAlignment="Center"/>
<Ellipse x:Name="pneuConInnerCirc" Grid.Column="0" Grid.Row="1" Fill="Black" HorizontalAlignment="Center" VerticalAlignment="Center"/>
<Button x:Name="HandModeAir" Content="Luft" HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Column="1" Grid.Row="1" Background="Gray" Click="HandModeAir_Click"/>
<Button x:Name="HandModeCycle1" Content="Kreislauf 1" HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Column="3" Grid.Row="0" Background="Gray" Click="HandModeCycle1_Click"/>
<Button x:Name="HandModeCycle2" Content="Kreislauf 2" HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Column="3" Grid.Row="1" Background="Gray" Click="HandModeCycle2_Click"/>
<Button x:Name="HandModeCycle3" Content="Kreislauf 3" HorizontalAlignment="Stretch" VerticalAlignment="Center" Grid.Column="3" Grid.Row="2" Background="Gray" Click="HandModeCycle3_Click"/>
<Button x:Name="HandModeWaySelector" Content="Pumpe RL" HorizontalAlignment="Stretch" VerticalAlignment="Top" Canvas.Left="0" Grid.Column="6" Grid.Row="5" Background="Gray" Click="HandModeWaySelector_Click"/>
<Button x:Name="HandModePump" Content="Pumpe Aus" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Column="2" Grid.Row="3" Background="Gray" Click="HandModePump_Click" />
<Button x:Name="HandModeMeasureSelector" Content="zu" HorizontalAlignment="Stretch" VerticalAlignment="Top" Grid.Column="4" Grid.Row="7" Background="Gray" Click="HandModeMeasureSelector_Click" />
<TextBlock Text="Werkzeug" Grid.Column="5" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Center" RenderTransformOrigin="0.5,0.5" >
<TextBlock.RenderTransform>
<CompositeTransform Rotation="90"/>
</TextBlock.RenderTransform>
</TextBlock>
<Rectangle Stroke="Black" StrokeThickness="4" Grid.Column="5" Grid.Row="0" Grid.RowSpan="3"/>
<Rectangle x:Name="Line1" Grid.Column="0" Grid.Row="1" Height="10" Fill="Green" Width="48" HorizontalAlignment="Right"/>
<Rectangle x:Name="Line2" Grid.Column="2" Grid.Row="1" Height="10" Fill="Red" HorizontalAlignment="Stretch" />
<Rectangle x:Name="Line4" Grid.Column="2" Grid.Row="2" Width="65" Fill="Red" Height="10" HorizontalAlignment="Right"/>
<Rectangle x:Name="Line3" Grid.Column="2" Grid.Row="0" Fill="Red" Height="10" Width="65" HorizontalAlignment="Right"/>
<Rectangle x:Name="Line5" Grid.Column="2" Grid.Row="0" Fill="Red" Width="10" Height="65" VerticalAlignment="Bottom"/>
<Rectangle x:Name="Line6" Grid.Column="2" Grid.Row="1" Width="10" Fill="Red" VerticalAlignment="Stretch" />
<Rectangle x:Name="Line7" Grid.Column="4" Grid.Row="0" Height="10" Fill="Red" HorizontalAlignment="Stretch"/>
<Rectangle x:Name="Line8" Grid.Column="4" Grid.Row="1" Height="10" Fill="Red" HorizontalAlignment="Stretch"/>
<Rectangle x:Name="Line9" Grid.Column="4" Grid.Row="2" Height="10" Fill="Red" HorizontalAlignment="Stretch"/>
<Rectangle x:Name="Line10" Grid.Column="6" Grid.Row="0" Fill="Red" Height="10" Width="65" HorizontalAlignment="Left"/>
<Rectangle x:Name="Line11" Grid.Column="6" Grid.Row="1" Fill="Red" Height="10" Width="65" HorizontalAlignment="Left"/>
<Rectangle x:Name="Line12" Grid.Column="6" Grid.Row="2" Fill="Red" Height="10" Width="65" HorizontalAlignment="Left"/>
<Rectangle x:Name="Line13" Grid.Column="6" Grid.Row="0" Fill="Red" Width="10" Height="65" VerticalAlignment="Bottom"/>
<Rectangle x:Name="Line14" Grid.Column="6" Grid.Row="1" Grid.RowSpan="4" Fill="Red" Width="10"/>
<Rectangle x:Name="Line15" Fill="RED" Grid.Column="5" Grid.Row="5" Grid.ColumnSpan="1" Height="10" HorizontalAlignment="Stretch" VerticalAlignment="Top" />
<Rectangle x:Name="Line16" Fill="RED" Grid.Column="3" Grid.Row="5" Height="10" HorizontalAlignment="Stretch" VerticalAlignment="Top"/>
<Rectangle x:Name="Line17" Grid.Column="2" Grid.Row="5" Fill="Red" Height="10" Width="65" VerticalAlignment="Top" HorizontalAlignment="Right" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line18" Fill="Green" Grid.Column="6" Grid.Row="5" Height="10" Width="65" HorizontalAlignment="Left" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line19" Fill="Green" Grid.Column="3" Grid.Row="5" Grid.ColumnSpan="3" Height="10" HorizontalAlignment="Stretch" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line20" Grid.Column="2" Grid.Row="5" Fill="Green" Height="10" Width="65" HorizontalAlignment="Right" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line21" Grid.Column="2" Grid.Row="5" Fill="Green" Width="10" VerticalAlignment="Stretch" Canvas.ZIndex="1" HorizontalAlignment="Left" Margin="59,0,0,0"/>
<Rectangle x:Name="Line22" Grid.Column="2" Grid.Row="4" Fill="Green" Width="10" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line23" Grid.Column="2" Grid.Row="2" Fill="Red" Width="10" Canvas.ZIndex="1"/>
<Rectangle x:Name="Line24" Grid.Column="6" Grid.Row="5" Fill="Green" Width="10" Height="50" Canvas.ZIndex="1" HorizontalAlignment="Center"/>
<Image Source="images/durchfluss.png" Grid.Column="3" Grid.Row="4" Margin="25,25,25,-10"/>
<Image Source="images/druckmesser.png" Grid.Column="5" Grid.Row="4" Margin="25,25,25,-10"/>
</Grid>
</PivotItem>
<PivotItem x:Name="Properties" Header="Einstellungen" HorizontalAlignment="Left" Margin="0">
<Grid>
</Grid>
</PivotItem>
</Pivot>
</StackPanel>
</Grid>
private void initCircuit()
{
var displayInformation = DisplayInformation.GetForCurrentView();
var screenSize = new Size(displayInformation.ScreenWidthInRawPixels,
displayInformation.ScreenHeightInRawPixels);
var circuitGridSize = new Size(circuitGrid.ActualWidth,
circuitGrid.ActualHeight);
double screenWidth = screenSize.Width;
double screenHeight = screenSize.Height;
double rowHeight = circuitGridSize.Height / circuitGrid.RowDefinitions.Count;
double gridWidth = circuitGrid.Width;
//Initialisierung des Schaltplanes
//Initialisierung der Verbindungen
//Pneumatikanschluss
pneuConInnerCirc.Height = rowHeight / 2.5;
pneuConOuterCirc.Height = rowHeight / 2;
//Werkzeuganschluss
PathGeometry toolSupplyPathVL = new PathGeometry();
PathGeometry toolSupplyPathRL = new PathGeometry();
//Werkzeugsymbol
//Pumpenanschluss
PathGeometry pumpSupplyPath = new PathGeometry();
//Messzweig
PathGeometry measurePath1 = new PathGeometry();
PathGeometry measurePath2 = new PathGeometry();
//Initialisierung der Aktoren des Schaltplans
//Initialisierung der Messinstrumente
TextBlock actualPressure = new TextBlock();
TextBlock actualFlowrate = new TextBlock();
//-----------------------------------------------//
//Luftanschluss
Line1.Width = ((screenWidth / circuitGrid.ColumnDefinitions.Count) - pneuConOuterCirc.Width) / 2;
Line5.Height = (screenHeight / circuitGrid.RowDefinitions.Count + Line3.Height) / 2;
Line3.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line4.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line10.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line11.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line12.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line18.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count + Line24.Width) / 2;
Line17.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line20.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count) / 2;
Line13.Height = (screenHeight / circuitGrid.RowDefinitions.Count + Line3.Height) / 2;
HandModeWaySelector.Width = (screenWidth / circuitGrid.ColumnDefinitions.Count);
HandModeWaySelector.Height = (screenHeight / circuitGrid.RowDefinitions.Count) / 3;
// Line24.Height= (screenSize.Height / circuitGrid.RowDefinitions.Count)/2 -HandModeWaySelector.Height;
// Line24.VerticalAlignment = VerticalAlignment.Stretch;
Line24.Margin = new Thickness((screenWidth / circuitGrid.ColumnDefinitions.Count - Line24.Width) / 2, HandModeWaySelector.Height / 2, (screenWidth / circuitGrid.ColumnDefinitions.Count - Line24.Width) / 2, (screenHeight / circuitGrid.RowDefinitions.Count) / 2);
Line21.Margin = new Thickness((screenWidth / circuitGrid.ColumnDefinitions.Count - Line24.Width) / 2, 0, (screenWidth / circuitGrid.ColumnDefinitions.Count - Line24.Width) / 2, (screenHeight / circuitGrid.RowDefinitions.Count) / 2 - Line20.Height / 2);
Line15.Margin = new Thickness(0, (HandModeWaySelector.Height / 2 - Line15.Height) / 2, 0, screenHeight / circuitGrid.RowDefinitions.Count - (HandModeWaySelector.Height - Line15.Height / 2));
Line16.Margin = Line15.Margin;
Line17.Margin = new Thickness((screenWidth / circuitGrid.ColumnDefinitions.Count) / 2, (HandModeWaySelector.Height / 2 - Line15.Height) / 2, 0, screenHeight / circuitGrid.RowDefinitions.Count - (HandModeWaySelector.Height - Line15.Height / 2));
}
在执行“测量过程”（且稳定）之前，不应依赖任何测量。尝试将
initCircuitMainPage处理程序中。你应该得到一些结果
编辑：更好的方法：
public MainPage()
{
this.InitializeComponent();
this.circuitGrid.SizeChanged += circuitGrid_SizeChanged;
}
private void circuitGrid_SizeChanged(object sender, SizeChangedEventArgs e)
{
//check for valid size
//if (valid) {
// initCircuit()
//}
}
private void initCircuit()
{
//
}
其想法是“倾听”每一个网格大小的变化，然后评估是否绘制。验证直接用于检查NaN或数字。我建议在执行具体的initCircuit
之前进行快速测试作为验证。这是因为在初始渲染过程中，您可能会看到一系列紧凑的SizeChanged
调用。
这不是一个防弹的解决方案，但在这一点上，你应该看到事情开始起作用了。根据你提供的代码，行的位置是根据当前应用程序视图的大小计算出来的。屏幕大小。的结果是物理显示分辨率（请注意，它不是显示分辨率）.我认为应该根据电路网格计算位置。请参考以下代码：
private void initCircuit()
{
...
double screenWidth = circuitGridSize.Width;
double screenHeight = circuitGridSize.Height;
...
}
此外，枢轴的高度固定为769，这将影响位置的适应性。最好将其配置为垂直填充StackPanel。你好，马里奥，谢谢你的回答。我试过这个，但没有成功。我还尝试在其他一些加载的处理程序中调用initCircuit，但也没有成功。你还有其他想法吗？嗯，“加载”提示更容易尝试，而不是真正的解决方案。我将编辑答案以获得更好的方法。现在，我得到的大小至少与显示器相同（800*480）。但是网格应该正好在PivotHeader下面（占10%：实验发现的），这意味着它的大小应该是800*432。现在网格在下边框下的范围是48px。好的，但是你的代码中的数据透视头在哪里？尝试添加它们，您应该会看到预期的结果。我在XAML文件中添加了它们。这还不够吗？或者我必须实例化一个标题才能使用它？我对用c编写UWP非常陌生#
public MainPage()
{
this.InitializeComponent();
this.circuitGrid.SizeChanged += circuitGrid_SizeChanged;
}
private void circuitGrid_SizeChanged(object sender, SizeChangedEventArgs e)
{
//check for valid size
//if (valid) {
// initCircuit()
//}
}
private void initCircuit()
{
//
}
private void initCircuit()
{
...
double screenWidth = circuitGridSize.Width;
double screenHeight = circuitGridSize.Height;
...
}