Questions on UI for WPF Forum

2 answers

120 views

Hello,
I have a grid bound to a DataTable where some numeric cells come in as blank, as the data behind is dbnull. This is a perfectly valid condition, as those cell do not require the user to enter a number.
However, after I click on those cells I enter edit mode, and while in edit mode I am required to enter a number, otherwise it doesn't let me leave the edit mode. I can alway press ESC to leave the edit mode, but then it leaves the old value in the cell. The side effect of this behaviour is that it doesn't let me change a cell that already has a number into a blank (dbnull), which should be perfectly legal in our case.
When trying to validate the blank numeric cell the output window is showing an error message from the system exception saying the dbnull value cannot be converted to a nullable Single.
Is there any switch, any grid property or any flag that allows to validate blank numeric cells and convert them to dbnull?
Thank you

GridView

answered on 02 Sep 2011

1 answer

105 views

Telerik GridView grouping performance issue

Hi guys,

We are using Telerik Gridview v 2011.1.419.35 (Q1-2011) for our development. The gridview displays at around 5000 records with around 50 columns.
We have noticed a considerable performance issues when we group the columns using the drag and drop feature. Espessialy grouping at level 2 and 3 with large text. It takes around 10+ seconds to group at level 3.
On the other hand, the same works great with GridView v 2011.2.0712.35 (Q2-2011). Any grouping at any level works just fine.

Was there any performance issue resolved in Q2 version regarding this?

-- AT

GridView

answered on 02 Sep 2011

2 answers

260 views

GridView events to ViewModel Commands

Hello,

Since ViewModel should not be aware of the View's content or events, I would like to link GridView events to Commands with parameters in my ViewModel, more specifically the "AddingNewDataItem" and "RowEditEndedEvent" events...

I need to initialize a new Item on the AddingNewDataItem event and need to add a new newItemRow with the RowEditEndedEvent event. We do not want to have to click the "Add Row" button of the GridView. It is unfortunate to have to write code for this behavior but I have no choice...

Thanks,

Michel

GridView

answered on 01 Sep 2011

5 answers

140 views

Drag Cue Off Significantly

What does the RadDragAndDropManager framework use to determine the position of the mouse cursor in relation to the mouse cursor? It's off significantly for me. The farther right I move, the more the cue drifts away from the mouse cursor. It gets closer as I move to the left of the window, but at its closest point, it's still at least an inch away. I'm aware of the RadDragAndDropManager.DragCueOffset property, but it seems the offset varies on different computers.

DragAndDrop

answered on 01 Sep 2011

5 answers

212 views

ViewModel Setting bound property to null does not remove grid selection

I have a RadGrid that has its SelectedItem property bound to a property in my ViewModel. In my ViewModel, if I set the item that is bound to the selected item equal to null I would expect that the selection would be removed from the RadGrid, but it does not.
XAML:

    
            <telerik:RadGridView Grid.ColumnSpan="2" SelectedItem="{Binding Path=WorkingMedicationOrder.DrugDosage_, Mode=TwoWay}" ItemsSource="{Binding DrugDosages}" Grid.Row="5" AutoGenerateColumns="False" ShowGroupPanel="False">

In my ViewModel I do the following expecting the SelectedItem in the RadGrid to be removed.

WorkingMedicationOrder.DrugDosage_ =

null;

Thanks,

GridView

answered on 01 Sep 2011

1 answer

129 views

Align AxisY on multiple charts that are stacked

I have a scenario where I need to have multiple charts stacked. I want to know how I could set the distances on the labels for the Y axis so that all of the charts line up. If the charts have different label precision and formatting, they do not line up and this is not desirable. Please advise.

Thanks,
David

I uploaded a pic here to show what I mean:
http://i56.tinypic.com/15xlp5k.png

Chart

answered on 01 Sep 2011

5 answers

708 views

How to prevent RadGridView auto row resizing?

I have a telerik RadGridView in which some columns can have a lot of data causing them to go multiline, which is fine. However, when we scroll horizontally and those multiline column data is out of view, the rows resize back to single line. We would like to avoid this.

DataGridView has a AutoSizeRowsMode but I can't find an equivalent RadGridView property.



Help?

GridView

answered on 01 Sep 2011

1 answer

87 views

RADtileview

Hi ,

Can we customize radtileview items to be displayed on to the right corner and lower part of the screen and the maximized item displays on the center. Similar to the mirror image of 'L'

Any help will be greatly appreciate.

Thanks
Sudha

TileView

answered on 01 Sep 2011

5 answers

511 views

Using the CollectionViewSource

Hello I recently tried to use a CollectionViewSource as the items source for the RadGridView in WPF. I wanted to do so for the ammount of filtering that I needed. Coming from a Windows development background that was "the way" to do it. I am new to my company and I am not trying to fall behind. Is there an example of how to do this? In C# all we have to do to apply a filter is add a filter event handler, but when I would do this the RadGrid would "hiccup." I ended up having to use a dataview object before pulling my hair out. I refuse to write for loops with the invention of generics in the .Net framework. Any and all help is appreciated.

Sean

GridView

answered on 01 Sep 2011

0 answers

118 views

CheckBoxColumn and Toolbar

Hi,

I have a grid with a checkbox column, which is bounded to a boolean property
and a toolbar with a Remove command.

The remove command should be enabled only if at least one element in the grid is checked.
The command logic resides in a View Model.

The problem i'm facing is that the Remove button is updated (enabled/disabled) only after
i move focus from the checkbox cell- I would like the button to update upon check/uncheck the checkbox.

Thank you,
Koby

GridView

asked on 01 Sep 2011