actualwidth

问题 In WPF, I want set a controls width to be, say, 97% of it's Parent controls ActualWidth property. How can I do this? 回答1: You can use Grid panel. E.g: <Border> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="0.97*"/> <ColumnDefinition Width="0.03*"/> </Grid.ColumnDefinitions> <Button Content="97%"/> <Border Grid.Column="1" Background="Green"> </Border> </Grid> </Border> Grid will occupy 100% of available border's size. First column will use 97% of it. And the rest 3% are given to

问题 Consider the following, simple code: XAML: <Grid Height="60" Name="grid"> <Grid.ColumnDefinitions> <ColumnDefinition Width="162*" /> <ColumnDefinition x:Name="coltest" Width="316*" /> <ColumnDefinition Width="239*" /> </Grid.ColumnDefinitions> </Grid> <Label MouseDoubleClick="TextBox_MouseDoubleClick" Content="{Binding ElementName=coltest, Path=ActualWidth}" Grid.Row="1"/> The MouseDoubleClick event: private void TextBox_MouseDoubleClick(object sender, MouseButtonEventArgs e) { grid

问题 I am trying to use the javascript function width to get the width of a container, and use it to calculate where some scrolling text should start scrolling (I want it to scroll inside of a yellow box): Now, javascript code like this: alert(yellowBox.width()); alert(yellowBox.innerWidth()); alert(yellowBox.outerWidth()); All show, 944, but I've determined the yellow box is actually a width of 500, but I don't want to use that value, because the width could change. And I'm not sure how to get

问题 Paste this into Cider. <Grid x:Name="Grid"> <Grid.ColumnDefinitions> <ColumnDefinition x:Name="ColumnDefinition"/> </Grid.ColumnDefinitions> <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock Text="{Binding ActualWidth, ElementName=Grid}"/> <TextBlock Text="{Binding ActualWidth, ElementName=ColumnDefinition}"/> </StackPanel> </Grid> Now, run it. The second TextBlock shows 0, but shouldn't, right? Workaround? 回答1: No, you didn't. ColumnDefinition does have an

问题 I tried to create a custom control, having a semitransparent rounded background: <Canvas> <TextBlock x:Name="StopText" Text="Some test text"/> <Rectangle Fill="SkyBlue" Width="{Binding Source=StopText, Path=ActualHeight}" Height="20" RadiusX="5" RadiusY="5" Opacity="0.2"/> </Canvas> The problem is that I can't, probably, bind to the ActualHeight / ActualWidth properties, cause they are not dependency ones. What to do to mantain the rectangle and textbox of same size? 回答1: The correct binding

问题 I have a 3 column grid in a window with a GridSplitter on the first column. I want to set the MaxWidth of the first column to a third of the parent Window or Page Width (or ActualWidth ) and I would prefer to do this in XAML if possible. This is some sample XAML to play with in XamlPad (or similar) which shows what I'm doing. <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:sys="clr-namespace:System;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx

问题 I tried to solve my previous question with manually binding the Width property of the DataGridTextColumn here is the first Version of my XAML Code. <DataGrid AutoGenerateColumns="False" Background="White" ItemsSource="{Binding Items, Mode=OneWay}" HorizontalGridLinesBrush="Silver" VerticalGridLinesBrush="Silver" Margin="332,10,10,10" CanUserAddRows="False" CanUserDeleteRows="False" x:Name="myDataGrid" ColumnWidth="*"> <DataGrid.Columns> <DataGridTextColumn Width="{Binding Path=ActualWidth,

问题 TextBlock tbl= new TextBlock(); tbl.text="Kishore"; double x=tbl.ActualHeight; double y=tbl.ActualWidth; If i execute the code from the loaded event in Metro - winRT will return 0 for both. How can I get the ActualWidth in the Loaded or SizeChanged event? 回答1: Call Measure() then Arrange() and then ActualWidth and ActualHeight will be updated. 回答2: Can also do this via UpdateLayout(); testBlock.ActualWidth This could be useful when calculating multiple objects heights and widths. 回答3:

问题 I need a Viewport3D for the sole purpose of doing geometric calculations using Petzold.Media3D.ViewportInfo . I would prefer not to have to place it in a Window or otherwise render it. I'm attempting to accomplish this by instantiating a Viewport3D and setting a few properties using the following C# method: private Viewport3D CreateViewport(MainSettings settings) { var cameraPosition = new Point3D(0, 0, settings.CameraHeight); var cameraLookDirection = new Vector3D(0, 0, -1); var

问题 So If I have a binding placed on width of a child object that links it to its parent's ActualWidth , what will happen? My guess is that the parent measures how much width the child wants, the child tells the parent 0 width, then the parent is given actual space during arrange, and it attempts to give the child zero since the child didn't want any. Then the actual width of the space given to the parent should cause the binding to change the child's width. At this point I would guess layout is