Questions on UI for WPF Forum

2 answers

101 views

Hi,

as I noticed RadDataPager now supports "Unbound Mode".
This in Fact means that is initially bound to Telerik.Windows.Controls.RadDataPager.UnboundPagerSource

And this broke my app - before I checked if I have to bind via
if(rdpMyPager.Source == null) //needs to bind

But now the Source is never null. A check with
if(rdpMyPager.Source is Telerik.Windows.Controls.RadDataPager.UnboundPagerSource)
also fails - Protection level doesn't allow access.
I also found no property like "IsBound / IsUnbound".

I could (in this case) work around the problems since I know what it is bound to.
But this is not always possible.

So is there a way to check if the pager is bound in a way like i did before with ...Source==null?

Manfred

DataPager

answered on 10 Sep 2010

2 answers

214 views

Setting header width/text wrapping for dynamically created columns

Hello,

I have a RadGridView for which the columns are generated dynamically at run-time.

I need to have the columns be as wide as they need to be for the cell's content but wrap on the column headers so the header text does not define the column width.

I have seen a similar post on these forums but the columns were defined in the Xaml, and the headers contained TextBlock.

In my case, the columns are created during the AutoGeneratingColumn event. As for the headers they are created this way:

private void dg_AutoGeneratingColumn(object sender, GridViewAutoGeneratingColumnEventArgs e)

{

e.Column.Header = GetHeaderName(e.Column.UniqueName);

}

Where GetHeaderName returns a string.

GridView

answered on 09 Sep 2010

10 answers

550 views

Specified element is already the logical child of another element. Disconnect it first.

Hi..
I'm trying to use the Transition Control with the RadPanel.. but I get this error

Specified element is already the logical child of another element. Disconnect it first.

Any ideas what I'm doing wrong?

thanks

<telerik:RadTransitionControl x:Name="TransitionControl"

Grid.RowSpan="2" Grid.ColumnSpan="2" Grid.Row="1" Grid.Column="0"

HorizontalAlignment="Stretch" VerticalAlignment="Stretch"

Content="{Binding SelectedItem, ElementName=radPanelBar}"

Duration="10">

</telerik:RadTransitionControl>

<telerik:RadPanelBar VerticalAlignment="Stretch" x:Name="radPanelBar" telerikControls:StyleManager.Theme="Windows7" ExpandMode="Multiple">

<telerik:RadPanelBarItem IsExpanded="True" BorderBrush="#FF000019">

<telerik:RadPanelBarItem.Header>

</StackPanel>

</telerik:RadPanelBarItem.Header>

TransitionControl

answered on 09 Sep 2010

1 answer

181 views

IsExpandedChanged Event bug?

We are using a telerik radgrid and would like to be able to expand - and then load - the details for each row on demand. On the radgridView, we added a ToggleDetailsColum, like this:

<telerik:RadGridView.Columns>
<telerik:GridViewToggleRowDetailsColumn />

Then we try to capture the IsExpandedChanged Event on the gridviewRow. I.e. this event:
IsExpandedChanged (Occurs when GridViewRow changes its GridViewRow.IsExpanded state)

But what happens is that everytime we click on the rowdetailsexpander (+), the system throws an exception:
A first chance exception of type 'System.ArgumentException' occurred in Telerik.Windows.Data.dll
And the event never seems to occur.

Is this a bug in 2010.2.812.40?

GridView

answered on 09 Sep 2010

3 answers

122 views

RadWindow on XBAP app

hi!,

I would like to know if it's possible to show a radWindow Dialog into page (xbap)? also is it possible to show window alert?

thanks

Window

answered on 09 Sep 2010

2 answers

99 views

need to set tooltip for radgauge in radrange

i need to set tooltip for radialrange in radialscale ...right now i am doing it by setting property like

 rs.Ranges.Add(New RadialRange With {.Background = Brushes.Blue, .Min = 0, .Max = 200, 
.StartWidth = 0.1, .EndWidth = 0.1, .TooltipFormat = "critical {0:F0}", .Tooltip = "critical"}})

but couldnt get to show tooltip with this..please help me out

Thanks,

Kapil Garg

Gauges

answered on 09 Sep 2010

3 answers

108 views

Grid and editable external detail form

Hello,
I want to have TabControl with two TabItems.
First TabItem will contain RadGridView (BROWSE TAB).
Second TabItem will contail UserControl with textboxes for currently selected/added/edited row (DETAIL TAB).
Detail textboxes will be editable only when row is in editable/append state, otherwise will be readonly.
Second TabItem (DETAIL) will contain toolbar with PREV, NEXT, EDIT, DELETE, ADD, COMMIT and CANCEL command, and buttons will be enabled only if needed (no rows - only ADD is enabled etc). Primary way how to change record will be by buttons on detail form ( not keys in the grid).
Result of all operations will be visible in grid (Grid can be read-only if needed). Primary source (ObservableCollection?, CollectionViewSource?) must be controlled by grid too (for example, source must be sorted when header in grid is clicked).

Does exist some example? Or some tip how to integrate RadGridView with this application logic?
Thank you very much.

GridView

answered on 09 Sep 2010

6 answers

132 views

RadDropDownButton GridView and DataPager binding

I'm trying to get a RadDropDownButton's Content to display a DataPager and a GridView. I have both displaying properly, and can bind to the current DataMember just fine. The pager's ItemSource binds find, and displays the proper number of pages.What I cannot do is bind the GridView's ItemSource to the DataPager's PagedSource. I have no way to specify the ItemSource binding on GridView. ElementName does not find it.

They are siblings, on the same level inside the DataTemplate.

Any ideas?

GridView

answered on 09 Sep 2010

3 answers

95 views

Suggestion: Create a Gauge designer or some predefined gauge templates.

The WPF and Silverlight Gauges are pretty in the demos but I must say they are a real pain to get started with. I have been using various gauge products in my applications for years and I think yours look great and operate great but to use them in your code really is a pain.

With great customizability comes great pain.

I think you would do your clients a big favor if you provided a Gauge designer. So that I can via a UI build out the XAML required for my Gauge. Start out with a high level Linear, Radial..etc and allow me to tweak some (not all) of the properties to make it into a gauge that I want in my application. Then allow me to cut and past the Gauge XAML into my code or do the paste for me. I think that would make your tools a million times better.

Another comment, somewhat related. Your demos have source code behind them so it is possible for a developer to take some of the code modeled in your demo and use it in their app. However your demo's use custom classes (whilst the code is written very well) it obfuscates what is happening. Because of this and your extremely limited documentation for WPF/Silverlight there is a great barrier to using your products. Wizards like the one I explained would help out a lot. Clearer documentation would also help greatly. An example of a shortfall in your documentation is this: I want to databind to a RadGridView but do not want to use AutoCreateColumns. You have no documentation on it. To me, AutoCreateColumns is not a real world feature but Custom Columns are.. there is documentation on the prior but not on the latter. One more note on WPF documentation. Create basic examples instead of massively complex examples. For example, do not use Control Templates and Styles in your basic examples (unless you are giving an example of such). This only confuses a WPF/XAML newbie and can turn them off of using your product. Maybe in a year it will make sense to elevate past some of the XAML/WPF basics but at this stage of the game I think it is good to show straightforward examples and add on to them in more advanced examples.

Anyway, I have been a Telerik customer for many years (across many of my clients) and I love your products. I just wanted to provide you some feedback in these areas that I consider deficiencies.

Thanks,

David Sandor

Gauges

answered on 09 Sep 2010

1 answer

154 views

Gridview Cell validation

I have enabled cell validation in my gridview and I am using CellValidating events. I also have 2 buttons on my window. If I am inside a cell and click on my buttons it fires the cellvalidating events. Is there a way to not to fire the cellvalidating event when selecting a cancel button.

GridView

answered on 09 Sep 2010