How to hide GridViewColumn using Data trigger in wpf?

Question

Hiding using Width would only hide it Visually, element is still there, what about screen reader.

I have GridViewColumn, where I want to show and hide based upon Property, How can I hide it.
Currently, I have using the this solution, However I want to do it using Property. How can I achieve it?

<GridViewColumn
                                CellTemplate="{StaticResource KeyTamplate}"
                                Header="{res:Label {x:Static res:enum.LabelName}}"
                                HeaderTemplate="{DynamicResource KeyHere}"
                                 />

mm8 · Accepted Answer · 2023-06-21T14:19:19.547

1

Bind the Width property to a double property of the view model that you set to 0 to hide the column:

<GridViewColumn Header="header..." DisplayMemberBinding="{Binding Property}"
     Width="{Binding ColumnWidth}" />

View Model:

public double ColumnWidth { get; set; } = double.NaN;

If you set the ColumnWidth property dynamically, you should implement the INotifyPropertyChanged interface and raise the PropertyChanged event in the setter to notify the view.

Since you can't style a GridViewColumn, using a DataTrigger is not an option.

But you shouldn't really need one as you can set the source property directly in your view model and handle all the logic there.

edited Jun 21 '23 at 14:19

answered Jun 21 '23 at 13:55

mm8

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Yes, I know this approach will work, but the tricky part is , I need to do it using ```DataTrigger```. – Nexo Jun 21 '23 at 14:09
You can't style a `GridViewColumn` so using a `DataTrigger` is not an option. But you shouldn't need one as you can set the view model property directly. – mm8 Jun 21 '23 at 14:10
Just implement your logic in the view model instead of using a `DataTrigger` in the view. – mm8 Jun 21 '23 at 14:19
What about setting ```DataTrigger``` to tamplates of ```cellTamplate``` and ```HeaderTamplate```. – Nexo Jun 21 '23 at 14:20
This won't affect the width or visibility of the column itself. And why do you want to to this in the view where you have a view model that you can set directly? It doesn't make any sense to me. – mm8 Jun 21 '23 at 14:21
I agree, its just because I was trying it to complete in this way. However now I think working with ```width``` is better approach. – Nexo Jun 21 '23 at 15:16
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/254179/discussion-between-nexo-and-mm8). – Nexo Jun 21 '23 at 15:22
Btw, what if someone is using screen reader to read, what will this hidden approach has affect? – Nexo Jun 21 '23 at 15:37
Please ask a new question if you have another issue. – mm8 Jun 22 '23 at 14:46
Hey, sorry, its not an issue, that the main reason, I have just updated my question. – Nexo Jun 22 '23 at 17:48
A screen reader cannot read an invisible element. – mm8 Jun 26 '23 at 15:16
We are setting width to 0, means element is still there. – Nexo Jun 26 '23 at 18:41
Depends on how you define "still there". It's not visible for a screen reader or a user. – mm8 Jun 27 '23 at 12:57

How to hide GridViewColumn using Data trigger in wpf?

1 Answers1