WPF Tree View items make read only

Question

0.00/5 (No votes)

See more:

Hi,
I would like to know that how Tree View Items get read only in WPF. Is read only property there?
I have a Treeview which is expanded and I want to make user not allow to collapse it.How I do it.
<treeview> <treeview.itemcontainerstyle> <Style TargetType="TreeViewItem">
<setter property="IsSelected" value="false">
</Style>
I used this in Xaml.But still allow to collapse it.
Please help me.

Thanks & Regards
Monish K.M

Posted 27-Jun-12 18:45pm

MONISH K M

Updated 27-Jun-12 21:35pm

v3

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2012-06-27T19:36:00

No. If you mean the class System.Windows.Controls.TreeViewItem, it does not have anything like that, please see by yourself: http://msdn.microsoft.com/en-us/library/system.windows.controls.treeviewitem%28v=vs.95%29.aspx[^].

The reason for this is not simple, but very simple, thing about it: the whole control System.Windows.Controls.TreeView is already totally read-only in the following sense: there are no predefined modifying operations which could be immediately used via UI, unless you define this in your code. Moreover, this is so because this control does not contain any predefined data object, unless the developer defines them. Anything like "edit mode" (in-place editing) or other data modification operations (add/remove/edit a node) via UI are possible only if you defined them in your code. If you do, you will be able to define your own notion of read-only or anything like that. Please see:
http://msdn.microsoft.com/en-us/library/system.windows.controls.treeview%28v=vs.95%29.aspx[^].

—SA

Clifford Nelson · Answer 2 · 2012-06-28T06:59:00

Solution 3

If you use the MVVM pattern, you can bind to the IsExpanded, and always return true. The other possiblility to so used the Collapsed event on the TreeViewItem to force the item back to expanded.

Posted 28-Jun-12 6:59am

Clifford Nelson

Sandeep Mewara · Answer 3 · 2012-06-27T19:50:00

Solution 2

Does this help:

XML

<TreeView>
    <TreeView.ItemContainerStyle>
        <Style TargetType="TreeViewItem">
            <Setter Property="IsSelected" Value="false"/>
        </Style>
    </TreeView.ItemContainerStyle>
</TreeView>

This will make your treeview items not selectable.

Posted 27-Jun-12 19:50pm

Sandeep Mewara

Comments

Lee_Olsen 21-Feb-13 16:29pm

This only makes the TreeViewItems default value of IsSelected be set to false. You can still select an item. You would need to bind IsSelected to a property that always returns false to make it unselectable.

Sandeep Mewara 22-Feb-13 0:32am

Agree with you. But I see question modified. Not sure what was Op's real intention then. But, yes, answer given by me sets false for first time. If it has to be throughout, something like you suggested should be done.

Lee_Olsen 21-Feb-13 16:34pm

Another option besides binding IsSelected to a property always returning false since this isn't always an option.

<TreeView>
<TreeView.ItemContainerStyle>

<Style TargetType="TreeViewItem">

<Setter Property="Focusable" Value="False" />

</Style>
</TreeView.ItemContainerStyle>
</TreeView>