Enabling individual items inside a disabled listviewitem

Mark

16y4.8k

I'm struggling with the following and would appreciate some help:

I have a number of items in a listview, some of which may be in a readonly state. When in readonly state, the items are disabled. However, I need the user to be able to remove them by clicking a button which is displayed using a celltemplate on a gridviewcolumn. By default this is disabled by default and setting IsEnabled="true" on the item itself does not enable it regardless of the state of the container.

I'd also like the user to be able to select the item to remove it in a multiselect mode. However selection is also disabled by default. What is the best way to achieve both ways of removing the item?

The item is disabled inside a user control using the following:

ListBoxItem listBoxItem = (Item is int) ? GetListBoxItemFromIndex((int)Item) : GetListBoxItemFromItem(Item);

if (listBoxItem != null)

{

listBoxItem.IsEnabled = Enable;

}

The button is defined in XAML as follows. It is a part of a gridviewcolumn inside a listview using a gridview to display the rows:

ImageSource="/App;component/Images/Red_Delete16.png"

ToolTip="Removes the train service from the list."

Name="buttonRemoveTrainService"

Visibility="{Binding IsRemovable, Converter={StaticResource booleanToVisibilityConverter}}">

....

Any clues would be much appreciated!

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Mark16y ago
In our scenario the listview has two modes. A single line view using the Gridview and a multiline view which styles the ItemContainerStyle and Template of the listview using listbox as it's basis.

In WPF listview is actually just a specialization of listbox so therefore it is valid to cast a listview back to a listbox and a listviewitem back to listboxitem. See the following for more information:

http://stackoverflow.com/questions/227231/wpf-listbox-vs-listview-how-to-choose-for-data-binding
0
Sam Hobbs16y ago
Correct me if I am wrong, but a ListBox is not a listview, correct? It helps to be accurate about things like that in questions.
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Mark16y ago

I have resolved this myself. I removed the existing code to disable the item and replaced it with the following property setting on the relevant iconbuttons:

IsEnabled="{Binding IsReadOnly, Converter={StaticResource inverseBooleanConverter}}"

I added the following trigger to each text based GridViewColumn to 'gray' out the text if the item is readonly: