how to add a customtext to datepicker text box - c#

i designed a textbox foe date picker but i cant add a custom text inside the textbox before choosing date.i want to add "select a date"
<Grid>
<DatePicker x:Name="DateGviya" SelectedDate="{Binding CurrentDate}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="97,77,0,0">
<DatePicker.Resources>
<Style TargetType="{x:Type DatePickerTextBox}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<TextBox x:Name="PART_TextBox" Text="{Binding Path=SelectedDate, StringFormat='dd/MM/yyyy hh:mm:ss tt', RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DatePicker.Resources>
</DatePicker>
</Grid>
result is like this:


You could use the TargetNullValue property of the binding:
<DatePicker x:Name="DateGviya" SelectedDate="{Binding CurrentDate}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="97,77,0,0">
<DatePicker.Resources>
<Style TargetType="{x:Type DatePickerTextBox}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<TextBox x:Name="PART_TextBox"
Text="{Binding Path=SelectedDate,
StringFormat='dd/MM/yyyy hh:mm:ss tt',
RelativeSource={RelativeSource AncestorType={x:Type DatePicker}},
TargetNullValue='Select a Date'}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DatePicker.Resources>
</DatePicker>

Related

How to change the display data format of the WPF DatePicker

I got this sample code from this forum.
<DatePicker SelectedDate="{Binding MainReportEndDate, Mode=TwoWay}"
DataContext="{Binding DataContext, RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type GroupBox}}}"
DisplayDateStart="1/01/20" DisplayDateEnd="12/31/22"
FirstDayOfWeek="Monday"">
<DatePicker.Resources>
<Style TargetType="{x:Type DatePickerTextBox}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<TextBox x:Name="PART_TextBox"
Text="{Binding Path=SelectedDate,
RelativeSource={RelativeSource AncestorType={x:Type DatePicker}},
StringFormat={}{0:MMM yy}}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DatePicker.Resources>
</DatePicker>
But it doesn't work. I want the same result as the one in the picture "Jul 20"

Try this
<TextBox x:Name="PART_TextBox"
Text="{Binding Path=SelectedDate, StringFormat='dd MMM yyyy',
RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />

WPF ComboBox Ensure ItemTemple UserControl inherits Background And Foreground From ComboBox

I have a ComboBox,
<ComboBox Grid.Row="1"
Margin="5"
ItemsSource="{Binding PreviousGroups, UpdateSourceTrigger=PropertyChanged}"
SelectedItem="{Binding SelectedGroup, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Style="{DynamicResource CBComboBoxStyle}"
ItemContainerStyle="{DynamicResource CBItemContainerStyle}">
<ComboBox.ItemTemplate>
<DataTemplate>
<objects:GroupNameObject GroupName="{Binding Path=Name}"
LastChecked="{Binding Path=LastVerified, StringFormat='dd - MM - yyyy |T| hh : mm : ss'}" />
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
which uses the item template GroupNameObject
<UserControl x:Class="MyProject.Objects.GroupNameObject"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:fa="http://schemas.awesome.incremented/wpf/xaml/fontawesome.sharp"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Name="groupNameObject">
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MyProject;component/Assets/Colors.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
<Border Padding="3"
CornerRadius="10"
Margin="3"
HorizontalAlignment="Stretch">
<Border.Style>
<Style TargetType="Border">
<Setter Property="Background"
Value="Transparent" />
</Style>
</Border.Style>
<StackPanel Orientation="Horizontal">
<Grid Width="40"
Height="40"
Margin="5 2 3 2">
<Border CornerRadius="10"
Background="{Binding Path=Background, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBoxItem}}}" />
<StackPanel Orientation="Horizontal"
VerticalAlignment="Center"
HorizontalAlignment="Center">
<fa:IconImage Icon="Folder"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBoxItem}}}"
Width="30" />
</StackPanel>
</Grid>
<StackPanel>
<TextBlock Text="{Binding Path=GroupName, ElementName=groupNameObject}"
FontSize="20"
FontWeight="Bold"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBoxItem}}}"
Margin="5 0" />
<TextBlock FontSize="12"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBoxItem}}}"
Margin="5 3">
<Run Text="{Binding Path=LastChecked, ElementName=groupNameObject, StringFormat='MM / dd / yyyy |T| HH : mm : ss'}" />
</TextBlock>
</StackPanel>
</StackPanel>
</Border>
with the ItemContainerStyle
<Style x:Key="CBItemContainerStyle"
TargetType="{x:Type ComboBoxItem}">
<Setter Property="HorizontalContentAlignment"
Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
<Setter Property="VerticalContentAlignment"
Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
<Setter Property="Padding"
Value="3,0,3,0" />
<Setter Property="Background"
Value="Transparent" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBoxItem}">
<Border x:Name="Bd"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
Padding="{TemplateBinding Padding}"
SnapsToDevicePixels="true">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsHighlighted"
Value="true">
<Setter Property="Background"
Value="{DynamicResource LemonCurry}" />
<Setter Property="Foreground"
Value="{DynamicResource LogoBlue}" />
</Trigger>
<Trigger Property="IsEnabled"
Value="false">
<Setter Property="Background"
Value="{DynamicResource PansyPurple}" />
<Setter Property="Foreground"
Value="{DynamicResource LemonCurry}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
When Built the DropDownItems inherit the Background and Foreground items correctly But the Displayed Item doesn't.
Display Item Example
DropDown Items Example
How Can I Change the Background and Foreground of the Displayed Item?
Edit:
Finally found a work around. instead of Binding the foreground and background of the GroupNameObject to the ComboBoxItem, I bound it to The ComboBox.
<StackPanel Orientation="Horizontal">
<Grid Width="40"
Height="40"
Margin="5 2 3 2">
<Border CornerRadius="10"
Background="{Binding Path=Background, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBox}}}" />
<StackPanel Orientation="Horizontal"
VerticalAlignment="Center"
HorizontalAlignment="Center">
<fa:IconImage Icon="Folder"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBox}}}"
Width="30" />
</StackPanel>
</Grid>
<StackPanel>
<TextBlock Text="{Binding Path=GroupName, ElementName=groupNameObject}"
FontSize="20"
FontWeight="Bold"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBox}}}"
Margin="5 0" />
<TextBlock FontSize="12"
Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ComboBox}}}"
Margin="5 3">
<Run Text="{Binding Path=LastChecked, ElementName=groupNameObject, StringFormat='MM / dd / yyyy |T| HH : mm : ss'}" />
</TextBlock>
</StackPanel>
</StackPanel>
and in the ItemContainerStyle I changed the Highlight Color to a diffrent shade so it doesn't clash with the ComboBox Colors.
<Trigger Property="IsHighlighted"
Value="true">
<Setter Property="Background"
Value="{DynamicResource BlueSapphire}" />
</Trigger>
Display Item After
DropDown Items After

You may have to override the ComboBox Template Property as well:
Example
<Style TargetType="ComboBox" BasedOn="{StaticResource baseStyle}">
<Setter ... />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid
x:Name="templateRoot"
UseLayoutRounding="True"
SnapsToDevicePixels="True"
>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="18" />
</Grid.ColumnDefinitions>
<Popup>
...
</Popup>
<ToggleButton>
...
</ToggleButton>
<ContentPresenter
x:Name="contentPresenter"
Grid.Column="0"
...
/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
Inside this ToggleButton is the Layout for your ComboBox

Assign ToolTip style to DataGridTemplateColumn

How do I assign a defined style in Window.Resources to the ToolTip style for my DataGridTemplateColumn?
<Style x:Key="StatusColumn" TargetType="ToolTip">
<Setter Property="Content">
<Setter.Value>
<TextBlock>
<Run Text="Black - Inactive"/>
<LineBreak/>
<Run Text="Green - Active"/>
<LineBreak/>
<Run Text="Yellow - Update"/>
</TextBlock>
</Setter.Value>
</Setter>
</Style>
I am trying in this way:
<DataGridTemplateColumn Width="50" Header="Status" IsReadOnly="True" >
<DataGridTemplateColumn.CellStyle>
<Style TargetType="DataGridCell">
<Setter Property="ToolTip" >
?
</Setter>
</Style>
</DataGridTemplateColumn.CellStyle>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Rectangle Width="20" Height="20" Fill="{Binding Brush}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

You can add a ToolTip as setter value and set its Style property using StaticResource.
<DataGridTemplateColumn.CellStyle>
<Style TargetType="DataGridCell">
<Setter Property="ToolTip">
<Setter.Value>
<ToolTip Style="{StaticResource StatusColumn}"/>
</Setter.Value>
</Setter>
</Style>
</DataGridTemplateColumn.CellStyle>

How to write the date in DatePicker without the day name?

I'm using a DatePicker in WPF app and I'm trying to get the date with month name in arabic and without the name of day.
I'm following the documentation of DatePicker link
For example (image from the link of the documentation):
I would like to write the date without "Monday" and I prefer to get it in Arabic language,
Xaml Code:
<DatePicker SelectedDateFormat="Long" x:Name="EnteringDate" Foreground="White" Background="Transparent" Height="30" FlowDirection="RightToLeft" BorderBrush="White"/>
The desired output:
What I have tried , solution in StackOverflow but it does not work for me :
<DatePicker SelectedDateFormat="Long" x:Name="EnteringDate" Foreground="White" Background="Transparent" Height="30" FlowDirection="RightToLeft" BorderBrush="White"> <DatePicker.Resources>
<Style TargetType="{x:Type DatePickerTextBox}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<TextBox x:Name="PART_TextBox"
Language="ar-EG"
Text="{Binding Path=SelectedDate, StringFormat='yyyy MMM dd',
RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DatePicker.Resources>
</DatePicker>

Try something like this, i.e. set the Language of the DatePicker to some arabic culture and then optionally change the format using an implicit DatePickerTextBox style:
<DatePicker Language="ar-EG">
<DatePicker.Resources>
<Style TargetType="{x:Type DatePickerTextBox}">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<TextBox x:Name="PART_TextBox" Text="{Binding Path=SelectedDate, StringFormat='yyyy MMM dd',
RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DatePicker.Resources>
</DatePicker>

Style TreeviewItem layout (MVVM)

I have a TreeView to which I bind a ObservableCollection where TreeView inherits TreeViewItem.
I want to style the header of the tree view to have a image in front of each header. I setted the header to the ItemContainerStyle but it did not chnage its layout. However it works for the ContextMenu.
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="ToolTip" Value="{Binding ID, Mode=TwoWay}"/>
<Setter Property="Header">
<Setter.Value>
<StackPanel Orientation="Horizontal">
<Image Source="Images/Icons/Plus-48.png" Height="10" Width="10" />
<TextBlock Text="{Binding MachinePartName}" Margin="0,0,4,0" />
</StackPanel>
</Setter.Value>
</Setter>
<Setter Property="ContextMenu">
<Setter.Value>
<ContextMenu>
<MenuItem Header="Add" Command="{Binding AddMachinePart_Command}"/>
</ContextMenu>
</Setter.Value>
</Setter>
</Style>
</TreeView.ItemContainerStyle>

You need to use HeaderTemplate instead:
<Setter Property="Header"
Value="{Binding }" />
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Source="Images/Icons/Plus-48.png"
Height="10"
Width="10" />
<TextBlock Text="{Binding MachinePartName}"
Margin="0,0,4,0" />
</StackPanel>
</DataTemplate>
</Setter.Value>
</Setter>
Don't forget to bind Header property.

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