I have the DatePicker styled to use the Windows8 theme with the following XAML, I want to know how I can set the AccentColor on the Windows8 theme from XAML, the documentation is not clear:


The documentation here show how to set the colors in code behind and how to access the colors in XAML but does not show how to set the colors in XAML

http://www.telerik.com/help/wpf/common-styles-appearance-colorizing-metro-theme.html



ta


Ollie

I'm facing this weird issue of the appoint filter not working the second time around.

My Application has calendars for different users.

When I first load the scheudle view (calendar) and try to filter it all works well. But then when I try to change the calendar for another user and then apply filter on it, nothing seems to happen. 

When I debugged, I realised that the predicate does hit all the time the filter is supposed to be called. But the second time around the predicate doesn't call the filter appointment method at all. I'm puzzled as to why this happens and need you to help me. 

As a background, I've bound the predicate (FilteredAppointments) to the appointment filter property in the xaml and the predicate then calls the filter appointment method (which returns a bool for each appointment). Also, all these are in separate classes, i.e. the predicate and the filterAppointments method.

Please help, need to resolve this ASAP.

Hi,

There is GridView with some columns and want to display total of one of the column which is having data of type System.Double. I had look at the same and tried to implement the same but it didn't work and end-up with following exception.

Code
<telerik:GridViewDataColumn DataMemberBinding="{Binding TravelRate, StringFormat=c}"
                                            UniqueName="TravelRate"
                                            Header="Travel Rate"
                                            MinWidth="100">
                    <telerik:GridViewDataColumn.AggregateFunctions>
                        <telerik:SumFunction Caption="Sum: "
                                             ResultFormatString="{}{0:c}"
                                             SourceField="UnitPrice" />
                    </telerik:GridViewDataColumn.AggregateFunctions>
</telerik:GridViewDataColumn>

Exception
No generic method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic.

I also had a look at another post where it's mentioned create custom aggregation function. I tried it but didn't get any success.

Code
public class SumFunction : EnumerableSelectorAggregateFunction
    {
        protected override string AggregateMethodName
        {
            get { return "Sum"; }
        }

        protected override Type ExtensionMethodsType
        {
            get
            {
                return typeof(Amounts);
            }
        }
    }

    public static class Amounts
    {
        public static Double Sum<T>(IEnumerable<T> source, Func<T, Double> selector)
        {
            return source.Select(selector).Aggregate(Double.Parse("0"), (t1, t2) => t1 + t2);
        }
    }

Can please some one help me with this?

Thanks.

Is there a way to customize the Enum dropdown list for a field?  We have different permission settings for our applications, and we have to limit options for some users.  An Example would be to have the following code:

Enum Produce
Apples
Oranges
Pears
Peaches
End Enum

Where we can set the 'Produce' field for some users to be able to see and select Apples and Oranges only, while others can  see and select the full list.

I have been directed to this article: http://www.telerik.com/help/wpf/radcombobox-howto-enable-disable-radcombobox-items.html, but that deals with setting it up with Xaml.  I need to change the list on the fly at runtime, and have accessed the RadComboBox with this line of code:

ComboBoxItems = RadPropertyGrid1.ChildrenOfType(Of RadComboBox)()

But now that I have it, how can I manipulate the list?  I have autobinding on, so when I try to clear or set the items manually, I get the error:

"Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead."

Hello,
we are facinga big problem with radchart performance. when we are plotting the graph with around 1000 rows in local enviroment it takes about 4-5 seconds , but when i deploy the same application on server it takes around 45-50 seconds to plot the graph .


Please, could you provide any help for this?

Thanks.

Ankur
 

I have a template selector that I would like to work with the RadPanelBarItem items presenter. Unfortunatley the template is never called. I am doing the following:

And am using the following Style for the RadPanelBarItem (Cut for brevity)

And the following Template Selector:

The Items in the RadPanelBarItems need to call the template selector which I thought would be called by setting the ItemTemplateSelector in the Style, but this does not seem to be the case. How can I call my template selector in the RadPanelBarItem Style?

I am using the following to link to further illustrate.

If I do the following in XAML the template selector is called but I don't know how many RadPabelBarItems I will have:

I have not had any luck with this so I am currently trying to do it procedurally. Is this possible to do this in XAML?

Regards,
Joseph

Hello

When I open a PDF using the "Open" button on the radtoolbar, I'd like to get the path of the selected PDF.  What's the best way to do this?  It would also work to pull this as a property from the pdfdocumentsource object etc. if available.

Thanks
Mark

Hello,

In my RadGridView I have a field "Fruits" which is a comma separated string such as "apple, orange, banana". When I group on Fruits, the groups are created based on the string value in the Fruits .. What I want is  separate group for each value in the Fruits column .. Is there a way I can achieve this? I saw examples of CustomGroupDescriptors, will that help me achieve this functionality?

Thanks.

<telerik:GridViewDataColumn DataFormatString="N0" DataMemberBinding="{Binding MyValue}" Header="{Binding MyLabel, StringFormat=This {0}}" />

"This " is not shown in my header. What am I doing wrong?

Hi I am using the DataGrid with UI virtualization enabled.
In XAML the main attributes set on the Grid are:
EnableRowVirtualization="True"
ScrollMode="Deferred"
SelectionMode="Extended"

The grid binds to a VirtualQueryableCollection that makes uses of the ItemsLoading event to load data into the VirtualQueryableCollectionView.
So a queryable is not passed in as a constructor.

The Grid is working fine except for when I want to call Grid.SelectedItems.Clear().

I am manually populating the Grid.SelectedItems with the correct rows that should be selected.

The Grid has 240,000 rows. I select a few rows at the top to the grid.
Then I scroll down the bottom of the grid.
At the bottom I add another row to the selection, so Grid.SelectedItems has 3 items in it. Everything is fine.
A call is made to Grid.SelectedItems.Clear().
The process freezes and eventually a Stackoverflow exception is thrown.
The stacktrace does not show much. Throughout the trace a call to VirtualQueryableCollection.Load() is occurring for the whole list in increments of the LoadSize (100).

This is with version:
2013.1.022.0.40

If I try version
2012.3.1129.40
The process does not have a Stackoverflow exception but is stuck in a loop and does not return.

If I select items at the top of the grid only, it works fine. And if I select items at the bottom of the grid it works fine.

The machine I work on is not connected to the internet but I may be able to provide the stacktrace if needed.