I'm currently using row validation for my datagrid. I'm trying to change the appearance of a row when it is not valid. My code so far in terms of visually reporting the error:
<DataGrid.RowValidationErrorTemplate>
<ControlTemplate>
<Grid Margin="0,-2,0,-2" Background="Red" HorizontalAlignment="Stretch"
ToolTip="{Binding RelativeSource={RelativeSource
FindAncestor, AncestorType={x:Type DataGridRow}},
Path=(Validation.Errors)[0].ErrorContent}">
<TextBlock Text="!" FontSize="{TemplateBinding FontSize}"
FontWeight="Bold" Foreground="White"
HorizontalAlignment="Center" />
</Grid>
</ControlTemplate>
</DataGrid.RowValidationErrorTemplate>
It seems that this will only affect my header row. Is there a way I can handle this RowValidationErrorTemplate to modify the row appearance? I would like to make the entire row's background red or anything like that.
Any ideas?
Please let me know if I need to provide more code for this particular problem.
Thanks in advance!
you can update the style of DataGridRow type and try to set error background based on Validation flag against the row.
Something like this...
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridRow}"
BasedOn="{StaticResource (x:Type DataGridRow)}"> <!--BasedOn is optional-->
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="True">
<Setter Property="Background" Value="Red"/>
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
Let me know if this helps.
Related
I have some radio buttons that I'm building a custom control template for. Image of the buttons:
In the control template, each radio button will have a textblock with its name and another textblock below it to indicate if it's unavailable.
I want the "Unavailable" text to be visible ONLY when the button is NOT enabled. When the radio button is ENABLED, the "Unavailable" textblock should be collapsed.
Here is the simplified view.xaml for the buttons:
<RadioButton Name="one"
IsEnabled="{Binding One_isAvailable}"
Style="{StaticResource RadioButtonTheme}" />
<RadioButton Name="two"
IsEnabled="{Binding Two_isAvailable}"
Style="{StaticResource RadioButtonTheme}" />
<RadioButton Name="three"
IsEnabled="{Binding Three_isAvailable}"
Style="{StaticResource RadioButtonTheme}"/>
Here is the simplified version of the styling I have so far (RadioButtonTheme.xaml):
<ResourceDictionary>
<Style BasedOn="{StaticResource {x:Type ToggleButton}}"
TargetType="{x:Type RadioButton}"
x:Key="RadioButtonTheme">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border CornerRadius="7">
<StackPanel VerticalAlignment="Center">
<TextBlock HorizontalAlignment="Center"
Text="{TemplateBinding Property=Name}"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
<TextBlock Name="UnavailableTextBlock"
HorizontalAlignment="Center"
Text="Unavailable"
FontSize="14"
FontStyle="Italic"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
So I've tried setting a couple things:
I set a visiblitity property on the radio button on the view.xaml. I then binded that visibility to the "UnavailableTextBlock" in the radiobuttontheme.xaml and set the rest of the template visiblity to "Visible." I thought that I can leave the template visible except for one element of it. I now don't think that's possible.
I tried directly binding the "UnavailableTextBlock" to the IsEnabled property of the radiobutton, and ran it through a BoolToVisiblityConverter.
<TextBlock Name="UnavailableTextBlock"
Visibility="{TemplateBinding Property=IsEnabled, Converter={StaticResource BoolToVisConverter}}">
However, I can't seem to get my converter to work inside of the ResourceDictionary. The program will crash with the error: "Cannot find resource named 'BoolToVisConverter'. Resource names are case sensitive"
I have this converter working across my other xaml files since I added it to my <Application.Resources> in the app.xaml. Do I need to link my Resource dictionary to the converter? How do I do that? <ResourceDictionary.Resources> didn't seem to work for me.
I tried adding a datatrigger to the "UnavailableTextBlock" as below:
<TextBlock Name="UnavailableTextBlock"....>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{TemplateBinding Property=IsEnabled}" Value="false">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
However, I get an error saying: '"IsEnabled" member is not valid because it does not have a qualifying type name.'
I'm guessing that it's referencing the IsEnabled property of the TextBlock and not of the radio button? Although I'm not too sure. I'm still learning WPF.
Thanks for all your help in advance!
If I understand correctly what you want to implement, then you need to use the control template trigger.
<Style BasedOn="{StaticResource {x:Type ToggleButton}}"
TargetType="{x:Type RadioButton}"
x:Key="RadioButtonTheme">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="RadioButton">
<Border CornerRadius="7">
<StackPanel VerticalAlignment="Center">
<TextBlock HorizontalAlignment="Center"
Text="{TemplateBinding Property=Name}"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
<TextBlock Name="UnavailableTextBlock"
HorizontalAlignment="Center"
Text="Unavailable"
FontSize="14"
FontStyle="Italic"
Foreground="{TemplateBinding Property=Foreground}">
</TextBlock>
</StackPanel>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="UnavailableTextBlock" Property="Visibility" Value="Hidden"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Referencing to this question: WPF Databinding: How do I access the "parent" data context?
I wanna do something similiar, but for the header of a Groupbox (because the header does not concern with the Box is being disabled and thus is always black while the rest is light gray. This looks a bit strange to me if all the content of the box is gray, the above is gray, but the box title itself stays black.
So I tried to use the approach mentioned in the linked question by flq to simply bind the isEnabled property of the header textblock to the isEnabled property of the groupbox but it seems that my binding at some point fails and I don't know where and why exactly.
heres my current code:
<GroupBox Header="Change Steps" Grid.Row="2" Grid.ColumnSpan="3" Name="gbChangeSteps">
<GroupBox.Style>
<Style TargetType="GroupBox">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}" FontWeight="Bold" Height="19" Foreground="Black" IsEnabled="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type GroupBox}}, Path=isEnabled}"/>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupBox.Style>
<!-- ... (some non relevant Content)-->
</GroupBox>
after additional research I found the post Disable groupBox including the groupBox name in WPF
that lead me, in combination with Properties->Create Databinding->Binding type->UIElement to the solution that fixed both problems, the one this question was about and the original one that lead to entire restyling, which was that letters like the small g got messed up in the header.
This is the code that fixed the issue:
<GroupBox.Style>
<Style TargetType="{x:Type GroupBox}">
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}" FontWeight="Bold" Height="19" IsEnabled="{Binding IsEnabled, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UIElement}}}">
<TextBlock.Style>
<Style>
<Style.Triggers>
<Trigger Property="Control.IsEnabled" Value="False">
<Setter Property="Control.Foreground" Value ="#FF6D6D6D" />
</Trigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupBox.Style>
I want to add conditionnal formatting (just font color) to the textbox part of a combobox. According to MSDN, it's the "PART_EditableTextBox" element. A quick search on SO got me started but I now face a problem: it overrides the whole template. According to this SO answer, I can use "BasedOn" to override only specific properties but I've no idea how/where to use it.
This is my current template:
<ControlTemplate x:Key="MyComboBoxTextBox" TargetType="ComboBox" <!--Here?--> >
<TextBox x:Name="PART_EditableTextBox" <!--Maybe Here?-->>
<TextBox.Style>
<Style TargetType="TextBox">
<Style.Triggers>
<Trigger Property="Text" Value="MAL">
<Setter Property="Foreground" Value="DarkOrange"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</ControlTemplate>
It works, I can still type in valid values and "MAL" does make the text orange but there's no dropdown anymore.
On MSDN, I found the following:
<TextBox x:Name="PART_EditableTextBox"
Style="{x:Null}"
Template="{StaticResource ComboBoxTextBox}"
HorizontalAlignment="Left"
VerticalAlignment="Bottom"
Margin="3,3,23,3"
Focusable="True"
Background="Transparent"
Visibility="Hidden"
IsReadOnly="{TemplateBinding IsReadOnly}" />
I suppose I should base my template on this "ComboBoxTextBox" but I don't know how to reference it. Do I really need to copy the whole template or is there a way to override a specific property?
EDIT:
On the same MSDN page comboboxTextBox is defined as
<ControlTemplate x:Key="ComboBoxTextBox"
TargetType="{x:Type TextBox}">
<Border x:Name="PART_ContentHost"
Focusable="False"
Background="{TemplateBinding Background}" />
</ControlTemplate>
I don't see how overriding this template removes the dropdown list.
Ok I think I got really confused after reading all of your code and having a really looooooong day at work, I totally missed the point of your question.... which is
I want to add conditionnal formatting (just font color) to the textbox part of a combobox
Well if that's all you want to do, then it's really easy with just a simple style trigger.
I can achieve that with this xaml.
<ComboBox HorizontalAlignment="Center" VerticalAlignment="Center">
<ComboBox.Resources>
<Style TargetType="ComboBox">
<Style.Triggers>
<Trigger Property="Text" Value="MAL">
<Setter Property="Foreground" Value="DarkOrange" />
</Trigger>
</Style.Triggers>
</Style>
</ComboBox.Resources>
<ComboBoxItem>MAL</ComboBoxItem>
<ComboBoxItem>1</ComboBoxItem>
<ComboBoxItem>2</ComboBoxItem>
<ComboBoxItem>3</ComboBoxItem>
</ComboBox>
Hope this helps!
Okay, first off I have no experience of WPF whatsoever so please bear with me and apologies if my terminology is a little wayward... ;)
The following code snippet is part of a WPF application that I have inherited. The trigger governs whether mandatory fields on a particular form are highlighted or not. The code works but the highlighting seems to apply to the control and the border (??) which contains it.
<ItemsControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="clr-namespace:Caliburn.PresentationFramework.ApplicationModel;assembly=Caliburn.PresentationFramework"
x:Class="company.product.Jobs.JobParametersEditor"
IsTabStop="False">
<ItemsControl.ItemTemplate>
<DataTemplate>
<DockPanel MinHeight="30">
<TextBlock Text="{Binding DisplayName, Mode=OneWay}"
DockPanel.Dock="Left"
VerticalAlignment="Center"
MinWidth="120"
Margin="6,0" />
<Border>
<Border.Style>
<Style TargetType="{x:Type Border}">
<Setter Property="Background"
Value="{x:Null}" />
<Style.Triggers>
<DataTrigger Binding="{Binding IsValid}"
Value="False">
<Setter Property="Background"
Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Style>
<ContentControl cal:View.Model="{Binding ValueEditor}"
ToolTip="{Binding ToolTip}"
IsTabStop="False"
MinHeight="19"
VerticalAlignment="Center"
HorizontalAlignment="Stretch" />
</Border>
</DockPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
The result is a bit clunky so I would like to restrict the highlighting to the control only but I can't figure out how to do it. I've tried moving the trigger so that it applies to the ContentControl instead of the Border but that didn't work and fiddling about with border margins, padding and thickness hasn't had any effect either.
Could anybody enlighten me as to how to accomplish this?
I have a problem with my combobox I'm trying to customize. It is in a UserControl, and i want its BorderBrush property to change from Transparent to White when the mouse is over it (fade in/out would be bonus).
But I can't seem to get the proper Trigger syntax to do so... now I feel confused and I'm probably missing something obvious here.
Here is the combobox in question:
<ComboBox x:Name="comboEmiCategories" ItemsSource="{Binding}" Background="Transparent" Height="15px" Width="30px" BorderBrush="Transparent" Padding="-2">
<ComboBox.Resources>
<sys:Double x:Key="{x:Static SystemParameters.VerticalScrollBarWidthKey}">0</sys:Double>
</ComboBox.Resources>
<ComboBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding}" Stretch="UniformToFill" Height="15px" Width="30px" Margin="0" />
</DataTemplate>
</ComboBox.ItemTemplate>
<ComboBox.Template>
<ControlTemplate>
<ControlTemplate.Triggers>
<Trigger Property="ComboBox.IsMouseOver" Value="True">
<Setter Property="ComboBox.BorderBrush" Value="White" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</ComboBox.Template>
</ComboBox>
The trigger isn't working, even worse actually, if i don't comment out the whole ComboBox.Template part, the control disappears.
The main goal would be to have a ComboBox that stacks images and allows the user to select one out of a list, with nothing else than those images shown.
Thanks.
EDIT:
Mario's solution of putting it within a style works, but is it the only way to do this?
Try to place the below xaml within the Resources section of your window/usercontrol.
<Style x:Name="cbStyle" TargetType="ComboBox">
<Setter Property="BorderBrush" Value="Transparent" />
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BorderBrush" Value="White" />
</Trigger>
</Style.Triggers>
</Style>
Of course you must refer this style in the ComboBox element. Also cut anything within the ControlTemplate, which is useless.
EDIT: your ComboBox section should look as follows:
<ComboBox x:Name="comboEmiCategories" ItemsSource="{Binding}" Height="15px" Width="30px" Style="{StaticResource cbStyle}" Padding="-2">
<ComboBox.Resources>
<sys:Double x:Key="{x:Static SystemParameters.VerticalScrollBarWidthKey}">0</sys:Double>
</ComboBox.Resources>
<ComboBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding}" Stretch="UniformToFill" Height="15px" Width="30px" Margin="0" />
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
Also put the Style declatarion in your UserControl.