CODEWITHSUNDEEP
c#xaml
Jedy
Jedy

Reputation: 133

Transform XAML to C#

I did not find it on the Internet
Help rewrite this code to C#

<Style x:Key="GroupHeaderStyle" TargetType="{x:Type GroupItem}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type GroupItem}">
                        <Expander x:Name="exp" IsExpanded="True" >
                            <Expander.Header>
                                <TextBlock/>
                            </Expander.Header>
                            <ItemsPresenter/>
                        </Expander>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

My code
An error in the code takes off.

Style GroupStyle = new Style() { TargetType = typeof(GroupItem) }; 
                Setter setter = new Setter { Property = Control.TemplateProperty };
                ControlTemplate template = new ControlTemplate { TargetType = typeof(GroupItem) };
                var expander = new FrameworkElementFactory(typeof(Expander));
                expander.SetValue(Expander.IsExpandedProperty, false);
                expander.SetValue(Expander.HeaderProperty, new TextBlock { }); // Error: System.NotSupportedException
                expander.SetValue(Expander.ContentProperty, new ItemsPresenter());
                template.VisualTree = expander;
                setter.Value = template;
                GroupStyle.Setters.Add(setter);

Doing datagrid grouping

Upvotes: 0

Views: 175

Answers (2)

Daniel Manta
Daniel Manta

Reputation: 6683

As @arconaut has said, first line should use typeof. So first tree lines are:

Style GroupStyle = new Style() { TargetType = typeof(GroupItem) }; 
Setter setter = new Setter { Property = Control.TemplateProperty };
ControlTemplate template = new ControlTemplate { TargetType = typeof(GroupItem) };

Then I believe IsExpandedProperty should be set to True based on the above XAML.

expander.SetValue(Expander.IsExpandedProperty, true);

Finally you need to pass FrameworkElementFactory as argument for SetValue() in the last two lines.

expander.SetValue(Expander.HeaderProperty, 
                  new FrameworkElementFactory(typeof(TextBlock)));
expander.SetValue(Expander.ContentProperty, 
                  new FrameworkElementFactory(typeof(ItemsPresenter)));

Upvotes: 1

arconaut
arconaut

Reputation: 3285

Try replacing your first line with this:

Style GroupStyle = new Style() { TargetType = typeof(GroupItem) };

The x:Type markup extension has a similar function to the typeof() operator in C# https://learn.microsoft.com/en-us/dotnet/desktop/xaml-services/xtype-markup-extension

Upvotes: 1

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