Pro Silverlight 3 in C# - XAML

3.1. XAML Basics

 <UserControl x:Class="SilverlightApplication1.MainPage"

 xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation

 xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml

 xmlns:d=http://schemas.microsoft.com/expression/blend/2008

 xmlns:mc=http://schemas.openxmlformats.org/markup-compatibility/2006

 mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

 <Grid x:Name="LayoutRoot">

 </Grid>

 </UserControl>

2. XAML Namespaces

 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

 xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

3. Design Namespaces

  mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

4.Custom Namespaces

  xmlns:w="clr-namespace:Widgets"

  <w:HotButton Text="Click Me!" Click="DoSomething"></w:HotButton>

5. Properties and Events in XAML

<Grid x:Name="grid1">

<Grid.Background>

<LinearGradientBrush>

<LinearGradientBrush.GradientStops>

<GradientStop Offset="0.00" Color="Yellow" />

<GradientStop Offset="0.50" Color="White" />

<GradientStop Offset="1.00" Color="Purple" />

</LinearGradientBrush.GradientStops>

</LinearGradientBrush>

</Grid.Background>

...

</Grid>

-----------------------------------------------------------------------

LinearGradientBrush brush = new LinearGradientBrush();

GradientStop gradientStop1 = new GradientStop();

gradientStop1.Offset = 0;

gradientStop1.Color = Colors.Yellow;

brush.GradientStops.Add(gradientStop1);

GradientStop gradientStop2 = new GradientStop();

gradientStop2.Offset = 0.5;

gradientStop2.Color = Colors.White;

brush.GradientStops.Add(gradientStop2);

GradientStop gradientStop3 = new GradientStop();

gradientStop3.Offset = 1;

gradientStop3.Color = Colors.Purple;

brush.GradientStops.Add(gradientStop3);

grid1.Background = brush;

6. Nesting Elements

<Grid x:Name="grid1">

...

<TextBox x:Name="txtQuestion" ... >

</TextBox>

<Button x:Name="cmdAnswer" ... >

</Button>

<TextBox x:Name="txtAnswer" ... >

</TextBox>

</Grid>

-----------------------------------------------

txtQuestion = new TextBox();

...

grid1.Children.Add(txtQuestion);

cmdAnswer = new Button();

...

grid1.Children.Add(cmdAnswer);

txtAnswer = new TextBox();

...

grid1.Children.Add(txtAnswer);

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private void Clear(DependencyObject element)

{

// If this is a text box, clear the text.

TextBox txt = element as TextBox;

if (txt != null) txt.Text = "";

// Check for nested children.

int children = VisualTreeHelper.GetChildrenCount(element);

for (int i = 0; i < children; i++)

{

DependencyObject child = VisualTreeHelper.GetChild(element, i);

Clear(child);

}

}