I am trying to get my feet wet with Telerik's controls as we are poised to get the Premium Package.  I found a nice How To video here(Brian Lagunas) that is very applicable to my environment however I am struggling to use Telerik's controls as the video maker uses Infragistics.  The key sticking point is the below.


In his video there is a control for "Ribbon Window Content Host" that doesn't seem to have a counterpart in Telerik.  The code above gives me a design time exception of "The Property Content is set more then once".

Can anyone show me what I am doing wrong or missing?  This app is meant to be a proof of concept so I can justify to my boss purchasing this tool set.

 

 

Hi,
I am using the PropertyRelation on the RadgridView like so:

<Telerik:RadGridView.ChildTableDefinitions> 

 

    <Telerik:GridViewTableDefinition x:Name="gvtd"> 

 

        <Telerik:GridViewTableDefinition.Relation > 

 

            <telerikData:PropertyRelation ParentPropertyName="MyProperty"/> 

 

        </Telerik:GridViewTableDefinition.Relation> 
    </Telerik:GridViewTableDefinition>
</Telerik:RadGridView.ChildTableDefinitions>

Which works fine when it autogenerates the columns.. is there an example on how to user define the columns?


My futile tries involve:
AutoGenerateColoumns="False"
or   

AutoGenerateFieldDescriptors

 

="False"

I have tried setting the FieldDescriptors manually.

Tried to use HierarchyChildTemplate like so:

 

 

 

<Telerik:RadGridView.HierarchyChildTemplate> 

 

    <DataTemplate>

        <Telerik:RadGridView> 

 

            <Telerik:RadGridView.Columns> 
                <Telerik:GridViewDataColumn Header="ID" UniqueName="id"/>

                <Telerik:GridViewDataColumn Header="FirstName" DataMemberBinding="{Binding Name}"/>

            </Telerik:RadGridView.Columns>

        </Telerik:RadGridView>

    </DataTemplate>

</Telerik:RadGridView.HierarchyChildTemplate>


With the result of it loosing its binding and going back to the usercontrols dataContext.

- Martin

 

 

 

 

 

 

 

 

 

 

I am trying to use the RadTreeView in our application and I would like to change the background color of an item when either selected or the mouse is over it. I found some examples, but they are far more complex than I need and I'm unable to simplify them without breaking them. Is there a very simple example of just changing the background color, please?

Janene Pappas-McCrillis
Wireless Seismic

Hello,

I am making an application in which one of the requirements is being able to change the horizontal axis from a ContinuousDateTime to a CategoricalDateTime on the click of a button. I've had no problems doing this in itself, but when I change the horizontalAxis, my ZoomPanBar vanishes from the graph. Zooming and panning still works, just the bar is gone. Is there a way to get the bar back once it has vanished? Or even better, a way for it to not vanish at all?

Worst case scenario that the above cannot be done, could you provide some code that would allow a ZoomPanBar to control the zoom and pan of a chart in the same application?

Thanks in advance,
Dan

Hello,

I have a RadGridView for which I'd like to take advantage of the extended selection mode (shift-click, ctl-click, etc...), but also need the act of clicking on a row to add it to the list of selected rows without clearing out the other entries.  I would also like the act of clicking on a row that is already selected to remove it from the list of selected rows - much the same way Multiple selection mode behaves.

Is there a way to implement this behavior?

Thanks

Hi,
I have a problem with a GridViewDataColumn of a RadGridView binded to a DateTime? value.
I set DataFormatString to "{} {0:d}" and the column displays only date without time, and it is what I want.
The problem is that I am unable to set a null value in the cell pressing the DEL key or Backspace: when I leave the cell, its value is replaced by the previous value.

Have you any suggestion?

Thanks
Davide

I'm loading data and setting properties on a viewmodel bound to a RadTimebar.  This is done while the RadTimebar is not visible.  When the Timebar becomes visible (transition of views) the binding on the Timebar overwrites the property (SelectionEnd) value initially set?

Hello,

I am using 4-8 sparklines in one window. 
Each getting new points (new ItemSource) twice/three times a second (using DataBinding). 
The problem is that when I am trying to do other things in my window (for example opening a menu), the app takes time to respond.
I believe that the reason for that is the amount of refreshes a second.
I have three questions regarding that problem:
1. Is sparkline the right control for my needs? Is there another one you would recommend?
2. Is there any way to wait until I have the new points for all of my sparklines and only than refresh them all at once instead of each at a different time?
3. What is the cause for this problem? is it the GPU/CPU/Memory? (I believe that it has nothing to do with the other parts of my app because only when I added the sparklines this problem appeared)

Thank you in advance

Hello,

I have a TabControl whos ItemsSource is bound to an ObservableCollection of some view model. The view model contains an "IsReadOnly" property. I would like to show an icon (a lock of some kind) on the tab header items that are bound to view models with IsReadOnly flag set to true. How would I go about this?

While I am at it, how would I go about setting the same width for all tab items? They are bound to a string property from the same view model.

Many thanks,

Simon

Hi Telerik Team,

is it planned that an updated Version of RadDataForm will expose a "DataError" event just like the RadDataGrid?

I am binding the RadDataForm to a customized Telerik.Windows.Data.QueryableCollectionView (overriding AddNew(), CommitNew(), CommitEdit(), etc.), which internally binds to a custom database repository-class. Everything works fine so far, but the DataForm fails to handle exceptions occuring after calling CommitEdit() or CommitNew(). E.g. RadDataForm calls CommitNew(), the repository tries to insert the new item into the db, then a "unique constraint" or other DB-error occurs, the dataform crashes.  With DataGrid the approach works fine, as i subscribe the DataError event and handle the exception properly.
The only workaround now is, to catch the exception inside the CommitNew() / CommitEdit() method of the custom CollectionView() and call CancelNew() / CancelEdit() inside the catch-block. However this way the DataForm does not show an error to the user.
Using validation rules is no solution either, as some errors only occur when actually trying to insert / update an item in the database.

Best regards