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>

Clear Sort WPF DataGrid

WPF > Controls > ItemsControl > DataGrid > Clear Sort

_collectionView = (CollectionView)CollectionViewSource.GetDefaultView(dataGrid.Items);

_collectionView.SortDescriptions.Clear();

Convert Hex to SolidColorBrush

WPF > System.Windows.Media > BrushConverter

BrushConverter is used to convert a Brush object to or from another object type.

Example:

row.Background = (SolidColorBrush)(new BrushConverter().ConvertFrom("#FFA7CDF0"));

Get Current Row WPF DataGrid

WPF > Controls > ItemsControl > DataGrid > ItemContainerGenerator > ContainerFromIndex

Returns the element corresponding to the item at the given index.

Example

How to get current row if row is not selected.

var index = dataGrid.Items.IndexOf(dataGrid.CurrentItem);

var row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(index);

Get rectangles from canvas WPF code behind

WPF > Controls > Layout > Canvas > Children


Example 

Get all rectangles from canvas.

private List<Rectangle> GetRectangles()

{

    return canvas.Children.OfType<Rectangle>().ToList();

}

Round line WPF code behind

WPF > Line 

Line line = new Line

{
 Stroke = Brushes.Blue,

 StrokeThickness = 18,

 StrokeStartLineCap = PenLineCap.Round,

 StrokeEndLineCap = PenLineCap.Round,

 Height= 50,

 X1 = 50,

 X2 = 100,

 Y1 = 10,

 Y2 = 10

};

canvas.Children.Add(line);

        

Slider WPF Example

WPF > Controls > Slider 

    <Grid>

        <TextBox

            Text="{Binding ElementName=Slider, Path=Value,             UpdateSourceTrigger=PropertyChanged}"

            Margin="33,112,288,172"/>

        <Slider

            Maximum="100"  

            Name="Slider"

            Margin="33,48,288,213"

            IsSnapToTickEnabled="True"

            TickFrequency="1" />

    </Grid>

Binding ComboBox to Enum and use Tag as SelectedValuePath

WPF > Controls > ItemsControl > ComboBox > Bind ComboBox to Enum

XAML

<Window x:Class="ComboBoxTag.MainWindow"

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

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

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <ComboBox

                  SelectedValue="{Binding Rate, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"

                  SelectedValuePath="Tag" Margin="0,0,306,295">

            <!-- Tag is values of Rate enum -->

            <ComboBoxItem Tag="Bad">Bad</ComboBoxItem>

            <ComboBoxItem Tag="Low">Low</ComboBoxItem>

        </ComboBox>

    </Grid>

</Window>

C#

namespace ComboBoxTag

{

    public enum Rate

    {

        Bad = 0,

        Good = 1

    }

}

GridSplitter WPF Example

WPF > Controls  > GridSplitter 

<Window x:Class="GridSplitter.MainWindow"

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

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

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="*" />

            <ColumnDefinition Width="2" />

            <ColumnDefinition Width="*" />

        </Grid.ColumnDefinitions>

        <TextBlock HorizontalAlignment="Left" TextWrapping="Wrap" Text="TextBlock1" VerticalAlignment="Top" Grid.Column="0"/>

        <GridSplitter Grid.Column="1" Width="2" HorizontalAlignment="Stretch" />

        <TextBlock HorizontalAlignment="Left" TextWrapping="Wrap" Text="TextBlock2" VerticalAlignment="Top" Grid.Column="2"/>

    </Grid>

</Window>

TextBlock WPF Example

WPF > Controls  > TextBlock 

A TextBlock can contain a string in its Text property.

TextBlock is designed to be lightweight and is optimized for single-line display.

Example

<Window x:Class="TextBlock.MainWindow"

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

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

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <TextBlock Name="textBlock1" TextWrapping="Wrap">

            Simple text <Bold>Bold text</Bold> <Italic>Italic text</Italic>

        </TextBlock>

    </Grid>

</Window>

WPF Rectangle with Text

WPF > Rectangle > Add Text

<Window x:Class="Rectangle.MainWindow"

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

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

        Title="MainWindow" Height="350" Width="525">

    <Grid  Height="22">

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="50"/>

            <ColumnDefinition Width="300"/>

            <ColumnDefinition Width="*"/>

        </Grid.ColumnDefinitions>

        <Rectangle Fill="Aqua"

                   Grid.Column="1"

                   HorizontalAlignment="Stretch"

                   />

        <TextBlock 

                   Foreground="Blue"

                   Grid.Column="1"

                   VerticalAlignment="Center"

                   HorizontalAlignment="Center"

                   Text="Rectangle Text"

                   TextTrimming="CharacterEllipsis" />

    </Grid>

</Window>

WPF DependencyProperty Register Default Value

WPF > DependencyProperty > Register > Default Value

public static readonly DependencyProperty

UpdateSourceTriggerProperty = DependencyProperty.Register("UpdateSourceTrigger", typeof(UpdateSourceTrigger),

typeof(TextBox),

new FrameworkPropertyMetadata(UpdateSourceTrigger.LostFocus)); // add your default value here

WPF Validation remove red border on error

WPF  > Validation > Remove red border on error

Validation.ErrorTemplate="{x:Null}

Clear Validation Error On TextBox TextChanged event WPF

WPF > Validation > ClearInvalid

Removes all ValidationError objects from the specified BindingExpression object.

Example

this.TextChanged += TextBox_TextChanged;

void TextBox_TextChanged(object sender, TextChangedEventArgs e)

{

     Validation.ClearInvalid(((TextBox)sender).GetBindingExpression(TextBox.TextProperty));

}

DataGrid WPF show row number

WPF > Controls > ItemsControl > DataGrid > Show row number

XAML

<DataGrid 

        x:Name="dataGrid"

        LoadingRow="dataGrid_LoadingRow"

Code

private void dataGrid_LoadingRow(object sender, DataGridRowEventArgs e)

{

  // show row number

    e.Row.Header = (e.Row.GetIndex() + 1).ToString();

}

DataGridRow change color of selected row

WPF > DataGrid >  Color of selected row

  <DataGrid.Resources>

<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="#FFB8AEAE"/>

  </DataGrid.Resources>