Strikethrough GridViewColumn Member Under Certain Condition-CodePudding

I have a GridViewColumn that lists file paths. I have a filewatcher, and if the file is moved out of the watched directory, I want to strike through the filepath in my GridViewColumn.

Here is my XAML for the GridViewColumn:

<GridViewColumn x:Name="FileNameHeader" Header="File Name" DisplayMemberBinding="{Binding filename}" />

I can add a property to the structure that contains filename such as FileExists() which would return false if the file is missing. Then, I just need a way to set the strikethrough text. Could I possibly use some sort of styling?

CodePudding user response：

You could add a property of type bool e.g. Exists to your file structure to indicate that a file exists or not. Do not forget to implement INotifyPropertyChanged so that changes to the property are reflected in the user interface. In the following, I assume that your file structure is a class called FileData. Make sure to change it to the real name in your project. I changed the property name filename to Filename. It is a good practice to adhere to common naming guidelines, see Capitalization Conventions for reference.

In order to apply strikethough to the text, you need to create a custom CellTemplate, as there is no direct way to style the column. In the DataTemplate you create a TextBlock to display the Filename. Add a style to the TextBlock with a DataTrigger that sets the Strikethrough text decoration depending on the Exists property of your file structure.

<GridViewColumn x:Name="FileNameHeader" Header="File Name">
    <GridViewColumn.CellTemplate>
        <DataTemplate DataType="{x:Type local:FileData}">
            <TextBlock Text="{Binding Filename}">
                <TextBlock.Style>
                    <Style TargetType="{x:Type TextBlock}">
                        <Style.Triggers>
                            <DataTrigger Binding="{Binding Exists}" Value="False">
                                <Setter Property="TextDecorations" Value="Strikethrough"/>
                            </DataTrigger>
                        </Style.Triggers>
                    </Style>
                </TextBlock.Style>
            </TextBlock>
        </DataTemplate>
    </GridViewColumn.CellTemplate>
</GridViewColumn>

You do not necessarily need to set the DataType, but it helps with autocomplete in the editor.