WPF Calendar SelectedDates

WPF->Calendar

Add multiple selected dates to WPF Calendar.

<Grid>

   <Calendar x:Name="calendar" />

</Grid>

calendar.SelectionMode = CalendarSelectionMode.MultipleRange; 
calendar.SelectedDates.Add(new DateTime(2020, 1, 1)); 
calendar.SelectedDates.Add(new DateTime(2020, 1, 2));

Set DataGrid DataGridRow Background color WPF

WPF > DataGrid > DataGridRow > Background


<DataGrid.RowStyle>

  <Style TargetType="DataGridRow">

    <Style.Triggers>

      <DataTrigger Binding="{Binding IsValid}" Value="true">

        <Setter Property="Background" Value="Green"></Setter>

      </DataTrigger>

      <DataTrigger Binding="{Binding IsValid}" Value="false">

        <Setter Property="Background" Value="Red"></Setter>

      </DataTrigger>

    </Style.Triggers>

  </Style>

</DataGrid.RowStyle>

Get tree visual elements WPF

WPF > Windows > Media > VisualTreeHelper 

VisualTreeHelper provides methods that perform

tasks involving nodes in a visual tree.

Example:

Get tree visual elements for user control

FrameworkElement fe = (FrameworkElement)YourControl;

for (int i = 0; i < VisualTreeHelper.GetChildrenCount(fe); i++)

{

   Grid childVisual = (Grid)VisualTreeHelper.GetChild(fe, i);

   childVisual.Width = sp.ActualWidth;

}

What is Windows Presentation Foundation (WPF) ?

Windows > Controls > Binding > Printing > Resources

Windows Presentation Foundation (WPF) is a UI framework that creates rich, interactive client applications.

WPF combines application UIs, 2D and 3D graphics, documents and multimedia into one single framework.
The WPF development platform supports a broad set of application development features, including an application model, resources, controls, graphics, layout, data binding, documents, and security.
It is a subset of the .NET. Its vector based rendering engine uses hardware acceleration of modern graphic cards. This makes the UI faster, scalable and resolution independent.

WPF uses the Extensible Application Markup Language (XAML) to provide a declarative model for application programming.

Examples:

• Create a simple Hello World application

 

Create a simple ‘Hello World’ WPF application

WPF > First application

Create a simple ‘Hello World’ WPF application

Go to menu File - > New Project and then Visual C# -> Windows -> WPF Application.

 

Visual studio automatically creates the project and adds some files: MainWindow.xaml and MainWindow.xaml.cs
Double click on MainWindow.xaml and from Toolbox window drag a button and a label. Name label “lblTtitle”.

 

Double click button and add the following code: lblTitle.Content = "Hello World!";

 

Press F5 to run the application