Hi,

how can I use the FilterPopUp if I set ShowColumnHeaders="false"?

I have a seperate filter icon which call this code behind:

With ShowColumnHeaders="true" I can open the FilterPopUp by clicking my icon or the build in filter icon. If I set ShowColumnHeaders="false" I'll get a System.InvalidOperationException: 'Sequence contains no elements' exception.

The fluent theme auto hides the vertical scrollbars of the grid, is it possible to change this behaviour so that they always show? 

I have tried setting ScrollViewer.VerticalScrollBarVisibility="Visible" in the grid properties but it makes no difference, I think it must be coming from deeper the theme.

Thanks,

Richard

I am attempting to create a composite filter in a RadGridView.

I have a column which is a string value (ReasonTrigger) and a column which is a date column (Create Timestamp). 

If I specify a single filter (not a composite) and use a Distinct Value for the ReasonTrigger, the dropdown for that column displays all of the possible values for that column for the entire collection associated with the grid. The correct data displays which are only the rows for the alert type. See attached file - WorkingDropdown.png.

 I also need to be able to further filter by specifying a Create Timestamp which is within the last 24 hours. If I add a second individual filter (not using composite), the ReasonTrigger dropdown only shows the type that qualifies based on the ReasonTrigger and the date criteria.

If I use a composite combining the ReasonTrigger and the Create Timestamp, the same behavior occurs as the previous example. The drop down only contains the distinct value specified and the correct rows but does not show the other distinct values (which should appear but not be checked). See attached files - NotWorkingDropDown.png and NotWorkingDropDown2.png

Methods below.

Thank you.

Tom

//*************************************************************************************************************

// No composite - single distinct value filter - attached file - WorkingDropDown.png

// this works well for the AlertType (see dropdown image attached - WorkingDropdown.PNG)

  private void RefreshGridColumnsByFilterNoComposite()
        {
            Telerik.Windows.Controls.GridViewColumn countryColumn = this.radGridViewAlerts.Columns.AsQueryable<Telerik.Windows.Controls.GridViewColumn>                          ().Where(c => c.Name == "ReasonTrigger").FirstOrDefault();
            Telerik.Windows.Controls.GridView.IColumnFilterDescriptor countryFilter = countryColumn.ColumnFilterDescriptor;

            this.radGridViewAlerts.FilterDescriptors.SuspendNotifications();
            countryFilter.DistinctFilter.AddDistinctValue(AlertTypeDescription);
            this.radGridViewAlerts.FilterDescriptors.Add(countryFilter);
            this.radGridViewAlerts.FilterDescriptors.ResumeNotifications();
        }

//*****************************************************************************************

// Composite Filter - Distinct filter and date filter combined into a composite filter - attached files - NotWorkingDropdown.png and NotWorkingDropdown2.png

  private void RefreshGridColumnsByFilterComposite()
        {
            Telerik.Windows.Data.FilterDescriptor createdInLast24Hours;
            CompositeFilterDescriptor newForSpecificAlertTypeCompositeFilter;
            Telerik.Windows.Controls.GridViewColumn reasonTriggerColumn =                 this.radGridViewAlerts.Columns.AsQueryable<Telerik.Windows.Controls.GridViewColumn>().Where(c => c.Name == "ReasonTrigger").FirstOrDefault();
            Telerik.Windows.Controls.GridView.IColumnFilterDescriptor countryFilter = reasonTriggerColumn.ColumnFilterDescriptor;


            newForSpecificAlertTypeCompositeFilter = new CompositeFilterDescriptor();
            this.radGridViewAlerts.FilterDescriptors.SuspendNotifications();

            // add distinct value filter for 
            countryFilter.DistinctFilter.AddDistinctValue(AlertTypeDescription);
            newForSpecificAlertTypeCompositeFilter.FilterDescriptors.Add(countryFilter);

            // add filter for create timestamp 
            createdInLast24Hours = new Telerik.Windows.Data.FilterDescriptor("CreateTimestamp", Telerik.Windows.Data.FilterOperator.IsGreaterThan, query.GetSQLServerDatetime().AddHours(-24));
            newForSpecificAlertTypeCompositeFilter.FilterDescriptors.Add(createdInLast24Hours);

            newForSpecificAlertTypeCompositeFilter.LogicalOperator = FilterCompositionLogicalOperator.And;

            this.radGridViewAlerts.FilterDescriptors.Add(newForSpecificAlertTypeCompositeFilter);

            this.radGridViewAlerts.FilterDescriptors.ResumeNotifications();
        }

     I have a live updating RadCartesianChart and I noticed the data plots from right to left then scrolls.

I want the data to start plotting on the left then scroll as new data comes in...

     My chart currently plots a new data point once per second. Currently the chart will just scrunch and get smaller as it fills with data.

I would like to show a specific number of data points at any given time say 50 for example, And allow users to scroll back through older data points.

The first thing is how do I configure the RadCartesianChart to only show say the 50 latest samples in view?

Then allow user to scroll backwards to view older data?

Hi, I'm trying to add a textbox to the window header so that I can add some search as you type functionality. However while I can add the textbox I can't interact with it. It's like it is under a layer of the header. Double clicking the textbox resizes the window, the click doesn't go through to the text box. 

Attached is an example from MS Teams. 

Thanks,

Richard

Hello,

I`m trying to boost up the performance of the ScheduleView control when i have a lot of appointments.

I can see that Telerik is announcing a build in UI Virtualization for schedule view at the following link:  https://www.telerik.com/products/wpf/scheduleview.aspx 

but I can`t see it nor I can find a tutorial how to apply it on a Schedule view control.

I`ve also checked the tutorials about UI and Data virtualization  but I cannot see explained anything about the ScheduleView control.

For the data virtualization it`s said that the NOT supported.

https://docs.telerik.com/devtools/wpf/common-information/consuming-data/using-data-virtualization    

Can anyone point me to the right direction?   

I`m using 

My appointment template doesn`t seems like too complex. I`m experiencing poor performance once the number of appointments are more than ~100

 Hello,

When displaying the map with the OpenStreet provider (with a valid API key). The mini map displays an error message (API key required)!

See the screenshot