Very simple question, but I'm not sure how to do it with the Telerik MaskedInput controls.  How do you clear the control?  For example, I'm using a RadMaskedTextInput to collect social security numbers.  The Mask property is set to "d3-d2-d4".  If I want to clear the control do I set the Value property to "000000000"?  Or do I set the Text property to "___-__-____"?  Or is there some other property that I should use instead?  I've tried looking for a Clear() method of the control, but there doesn't appear to be one, unless I've missed it.

I'm using VS 2010 Premium, .NET 4.0, and 2011 Q2 versions of the Telerik controls.

What's going on with the RadPanes collection when clicking the Close (x) button from the pane header? RadPanes are being added through code. The RadPaneGroup.Items.Count property is incremented and decremented as panes are added and closed (x). However, the RadDocking.Panes.Count property only increments as new RadPanes are added programmatically and so I don't understand the relationship here. Shouldn't the RadDocking.Panes.Count property sum the total of all panes in the RadPaneGroups?

I've tried removing closed RadPanes in the RadDocking_Close event by clearing the RadDocking.ActivePane.Content, .Header, and .DataContext properties as previous forum posts suggest, but an "object not set to a reference" error is thrown when the RadDocking.ActivePane.RemoveFromParent method is called. Hence, I can't free up resources by clearing out closed panes when a pane is closed.

Further, the RadPaneGroup.Items.Count value is decremented by 1 for each RadPane that has its pinned stated changed to "unpinned," then incremented by 1 for each RadPane that becomes "pinned." This too is strange since the RadPane's are still in the group; just unpinned.

I'm working with the Telerik 2011 Q2 WPF controls (the last version we got, although we will be renewing our license soon).  I'm trying to put a control on the form for gathering the client's social security number.  Initially I used the RadMaskedNumericInput, because that's what I thought I should for SSN.  I now realize that was a mistake.  Now I believe I have to use the RadMaskedTextInput control.  I've tried a Mask value of "###-##-####" and now I'm trying "d3-d2-d4", but I don't know that it makes much difference.

What does make a big difference is what comes from the database (SQL Server 2005) and what goes back to the database.  As it turns out, all of the SSN in the database have the "-" between the first 3 digits and the second 2 digits, and between the second 2 digits and the third 4 digits.  Thus, if the client had a SSN of 555-12-1212, that is exactly what's stored in the database.  That's what's got to be displayed, that's what's got to go back.  And of course its stored as a VARCHAR(11) in the database.  But when the data gets fetched from the database, what gets displayed in the RadMaskedTextInput control looks like this (using the same ficticious SSN): "555--1-2___"

That's not going to work at all.  What am I doing wrong and how do I fix it?  Here's the XAML:

I'm looking for a way to set the drop-down width for a ComboBoxCoumn to the same width of the column.

Hello
i need to read/capture a value belongs to the cell selected in gridview
in the second time i need to generate an event when i click on one cells,this event return a value that belongs to the cell selected
can you help me plz

I'm trying to avoid a lot of custom work with themes because all I want to do is change the Header BorderBrush used on various controls.  I was hoping I could do this as in the following snippet from a RadCalendar Style in my ResourceDictionary...


And then in my xaml...

However it doesn't work.  Is there anyway to implement something along these lines?

Thanks in advance,
Steve

Hello
I would like to create custom context menu for raddatetimepicker, using rad contextmenu. Hover I cannot asign it. It always diplaying default textbox contextmenu.

Hello Telerik,

My scenario is this:
I have a client-server application with a tree (RadTreeView), which is data bound with a DataTemplate for the nodes.
Nodes that are not yet expanded don't hold any data, but an invisible child node, so an expander will be displayed.
Expanding the node loads the next level from the server, then removes the child node from the ItemsSource and then adds the new nodes to the ItemsSource.
The WPF application is designed as MVVM.
Since the application has more windows besides the tree, and the response from the server might take a while, the application should not wait for the server. Thus we decided to use a BackgroundWorker in the view model.


Effect:
When I run the program, and expand a few nodes by clicking the expander, the tree runs into a NullReferenceException.
I get this call stack location:
c:\TB\102\WPF_Scrum\Release_WPF\Sources\Development\Controls\Navigation\TreeView\Virtualization\TreeViewPanel.cs'  Line 1452

This happens only when a level has more than 405 nodes, and when the background worker is used, and when I remove the dummy child. So I suspect it's a matter of the asynchronous behaviour when removing an Item from the ItemsSource.

I have tried removing the dummy child before and after inserting the new nodes, even after the background worker is finished, it all ends up in the exception.

I can provide a simple example in a Visual Studio solution which demonstrates the effect (17kB zip).
Maybe your developers are interested in the exception, or maybe you have a workaround(?)

I hope you can help me, because when I get the RadTreeView running with our MVVM pattern, my evaluation will be (positively!) complete. Seems like this is the last issue I have :)

Hi 

I'm developing a Surface v2.0 application and I'm using book control to display images (converted from a pdf document). I'm containing the control in a ScatterViewItem to allow the book to be resizable and draggable. This is all working fine. 

My problem is when trying to turn the page, any drag motion moves the ScatterViewItem and doesn't turn the page. A Single/Double tap on the corner of the page does turn the page though but isn't intuitive enough to be useful.

Does anyone have experience in using the control in a Surface app and knows how to enable the page turn please (I know it's a bit of a long shot).

 I've included the Xaml I'm using below

Hi guys,
I need your professional support.

The current behaviour of autocomplete logic is to complete typed characters with appropriate string value. I would like to have another behaviour if it is possible: when you type the characters, combobox will show all possible items in dropdown menu of the combobox and user will be able to select the item from the filtered list.

Thanks in advance,
Julian