I was trying to switch over to the DragDropManager today as the builds are now showing the previous manager is obsolete. (Moving to 2013 Q1 SP1).

It all looks straight forward as I use DragInitialize to setup for the drag and then watch GiveFeedback to see what DragDropEffects are being passed back by a valid drop target below what I am dragging (cursor).

Put simply, I can drag all over my app's window and see DragDropEffects.Copy always being returned. Except for a few limited cases, e.g., dragging over a standard WPF text box or the app title bar, or a window outside my app. In the latter cases, I get DragDropEffects.None - as expected!

I must be missing something. I have a custom class as the payload being dragged. I even set it so automatic conversions are not allowed. How are the window's in my app returning the DragDropEffects.Copy effect when they should have absolutely no idea as to how to interpret the payload?

Is it because I have mixed old and new drag/drop methodologies? Is this an error on my part, or the new implementation?

I really want the app to show the cursor associated wth DragDropEffects.None until it is over a target that recognizes the payload type.

Any suggestions appreciated.

Hello, I am using Telerik WPF RadControls for generating the PDF417 barcode image. I need to specify the number of barcode image columns and rows. The code I am using is following:


Some other solutions I tested have properties like "NumberOfRows" and "NumberOfColumns". I would like to know whether it is possible to adjust that with RadControls.

 Please help. Thank you.

I can set the theme for the whole app, but can I for a usercontrol?

Is it possible to initialize NumericUpDown with null, so that the NullValue is shown when the NumericUpDown is shown first time?
NullValue is shown correctly when a user deletes the content of the NumericUpDown, but when I initialize the view model's property with null NumericUpDown shows 1 (my minimal value).

My XAML code is the following:

Filter Dialog Presentationproblem in Windows 7 with "Filter" and "Clear Filter" - Buttons.

Please look the attached file.

Hello Forum

I have a RadGridView with two columns. One ComboboxColumn, and one other column. Lets say i have two rows in that grid as well. Whenever i change a value in the Grid, a Calculation is triggered. This calculation can change all the values in my two rows and columns.

Notice: Changing the value in the ComboboxColumn in Row1 can / does effect the value in the ComboboxColumn in Row2.

This works fine for all the column types i have tried, except the combobox column. The Combobox will not get updated until i edit a value in the same row, which is too late.

My ComboboxColumn definition looks like that:


By searching the documentation and the forums for a solution i have found that there seems to be a difference between ItemsSourceBinding and ItemsSource. Without understanding the difference i have tried using ItemsSource as well, but this did not show any of my "ProposedValues" in the Combobox. Could this be because of the Indexer "Field[ANTRIEB].ProposedValues?

Additional Info: The Cells not being updated are readonly, i have not tested with "not readonly" cells. But they get updated when i edit another cell in the same row and with other columns, the readonly does not affect (avoid) the update.

Thanks in advance
Michael

Hello,

   I'm binding a gridview to a DataTable whith 3 columns A,B,Total, where total is A+B.

   When Cell A or B is changed I update the DataTable using a class that Notifies the propertychanged.

   If I use the default DataGrid from WPF the column Total, is updated accordingly, but when I use the RagGridView, it's not updated. In order to have it updated I have to create a button and call the rebind method. (If I call the rebind whithin the CellEditEnded handler I get into an infitinte recursive loop; if I add a boolean to avoid this, I get exceptions...)

   How would be the way to get this working ? Which means how to update Sum column if A or B has been modified, acknowledging the business logic is managed within the class generating/updating the DataTable.

Thanks for your answer.




  

I seems experience very bad performance degrade when I use drag and drop RadListbox.  The version I use is RadControls for WPF Q1 2012 SP1.  Here is my xaml code for the lisbox:

<telerik:RadListBox ItemsSource="{Binding Offices}" DisplayMemberPath="Name" Height="Auto" Margin="10,0,0,10" Grid.Row="2" Grid.Column="1" Width="120">
    <telerik:RadListBox.DragVisualProvider>
        <teleric:ScreenshotDragVisualProvider />
    </telerik:RadListBox.DragVisualProvider>
    <telerik:RadListBox.DragDropBehavior>
        <teleric:ListBoxDragDropBehavior />
    </telerik:RadListBox.DragDropBehavior>
</telerik:RadListBox>

The Offices binding to ItemsSource above has about total 500 records and type is List<string>.  Any recommendations or solutions are welcome.
Thanks,

I have dynamically created and added series on my chart. Each of these series has its own vertical axis which is created in the following way:


I have vertical and horizontal zooming setup for my chart in my xaml:


Why do I not see zooming on my vertical axes?

Is there something else I can setup when I dynamically create the axis?

I'm working on a project using RadPDFViewer. We've implemented multiple Windows 8 style themes with the following code snippet:


...in which the color brushes above are swapped out at runtime inside merged resource dictionaries.This gives us the ability to create a Light/Dark theme controlled by a dropdown.

However, we're finding that the colors used in some of the controls aren't acting the way we want (focus color in one control seems be be used for content elswhere), so we're customizing the templates. We've had good success with this approach so far, but the PDFViewer is being difficult.

Specifically, we want to force the page of the pdf (ie: just the area under the pdf itself, not the border around the page) to be white regardless of what background color we're using in other controls.

There seem to be a few possibilities for achieving this:
- Using a different theme (Office Dark, Vista etc...) for the PDFViewer and applying it explicitly. The downside is that we will no longer be able to apply an application wide theme and will have to specify the Windows 8 theme on all other controls.
- Figuring out how to override the template of the PDFViewer in a way that provides access to the page background. I haven't been able to figure this out.
- Applying different values for the Windows 8 palette for just the PDFViewer. As near as I can tell, the palette is global so no way to do it.

Is there a smarter way to go about this?