Comments by Jan Bakker (Top 29 by date)

Are you using .net ?
I'm using .net 4.5 system.IO in a C# wpf application.

The actual answer to my question is:
It's because in a ternary operator, the two values must be the same type.
Short and clear answer, so 5+

Now it's clear to me.
Thanks.

That works, but why is that necessary?
It's not necessary in the the other line of code.

The website messed up the code somewhat, so you must correct that.
Feel free to ask a question if something is not clear.

You hard coded your rotation point and using a font size on different screens results in different size (pixels) for your text. Place the rotation point in the middle of your text using ActualWith /2.0 and ActualHeight / 2.0

Yes I know, but you say WindowsApplication. That means it can be WPF or Forms. Now I know you mean WindowForms. e.Handled does not exists in windows forms.

Still not clear, to me.. You say yes, but then you say until..?

Do you want the button to be pressed only once the entire lifetime of the program?

You are right :)

And you have to completely rewrite your code for the database, because sqlite is not the same for WPF and windows phone :(

I agree with this.
I wanted the same thing. After some studies I abandoned this idea and went for displaying *.stl files only.
If your wpf skills are good, displaying *.stl or xml files, panning, zooming and rotating can be done in a couple of day's.

A better way, is to create a new transparent window (no borders) and put your button in this window. That way you can move outside of your original window.

Just guessing...... Since there isn't any code to inspect. You text color might be the same as your background color.

that's impossible with this kind of limited information.

What do you mean: Not accurate?

Try giving each textblock a different backgroundcolor.
You might be able to see what is happening.

Did you alter the ControlTemplate?

Do you need code or do you want a general approach for this problem?
what have you tried?

Keep in mind that the wpf treeview is just the interface between the data and the user. The Treeview makes the data userfriendly to that user.

Never set selected or expanded or ... on the treeview itself. Always do that in your data.

<pre> <Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsExpanded" Value="{Binding IsNodeExpanded}">
</Setter>
</Style>
</pre>


So, IsExpanded would be a better name ;)

The nodes do not now by themselfs if they are collapsed or expanded. You must provide that information in your data and by binding that data tell the nodes wich piece of data is used for collapsing and expanding.

So your data must contain for each item, for example: bool IsCollapsed.
(Or use some other name)

In your Treeview ControlTemplate you must bind that piece of information.

Do you use a template for your treeview, or are you just adding items in code behind. Could you show me that part of the code?

Do the treeviewItems have 2 columns?