WPF simple tips-and-tricks? [closed]

Answer 1

Decide dimensions of one control based on another at runtime.

<... Width="{Binding ElementName=referenceElement, Path=ActualWidth}" ../>

This can be done with Height/MaxHeight etc. too.

Answer 2

Insert double quotes in content:

<Button Name="Button"
        Background="AntiqueWhite"
        Content="{}{Background=&#0034;AntiqueWhite&#0034;}"/>

Answer 3

Visibility is a three-state System.Windows.Visibility enumeration:

• Visible - The element gets rendered and participates in layout.
• Collapsed - The element is invisible and does not participate in layout. Effectively giving it a height and width of 0 and behaving as if it doesn't exist.
• Hidden - The element is invisible but continues to participate in layout.

Answer 4

A Grid with the Background left as default or set with a Transparent brush will not fire the IsMouseOver event unless the cursor is over a containing control. To ensure the event is fired over the Grid itself, simulate Transparency by setting the Background to the container Background color.

Answer 5

Padding and Margin are entered using comma-delimited syntax and are of type Thickness. They can be entered as:

• Padding="5" (Padding is 5 on all four sides)
• Padding="5,10,15,20" (Padding is Left: 5 Top: 10 Right: 15 Bottom: 20)
• Padding="5,10" (Padding is 5 on the Left/Right and 10 on the Top/Bottom)

Answer 6

Debugging WPF binding.

Adding tracing for bound properties:

<Window …
 xmlns:diagnostics="clr-namespace:System.Diagnostics;assembly=WindowsBase"/>
    <TextBlock Text="{Binding Path=Caption, 
diagnostics:PresentationTraceSources.TraceLevel=High}"…/>

You will get in the output window much details about the binding:

PropertyChanged event from SomeObject (hash=1)
SetValue at level 0 from SomeObject (hash= 1) using RuntimePropertyInfo(Field): 
'False'
TransferValue - got raw value 'False'
TransferValue - using final value 'False'

//EDIT More Info here.

Ariel