Questions on UI for WPF Forum

4 answers

1.6K+ views

How to user "CellEditEnded" event using MVVM?

Hello.

I want to use CellEditEnded event using MVVM.

It's a summary source.

<Button Content="Load"

Command="{Binding OnClickLoadCommand}"

CommandParameter="{Binding ElementName=gridViewSharedParameter}"/>

<telerik:RadGridView x:Name="gridViewSharedParameter"

ItemsSource="{Binding SharedParameterGroupItem.SharedParameterName}"

SelectedItem="{Binding SharedParameterSelectedItem, Mode=TwoWay}"

CurrentItem="{Binding SharedParameterCurrentItem, Mode=TwoWay}"

>

</telerik:RadGridView>

<telerik:EventToCommandBehavior.EventBindings>

<telerik:EventBinding EventName="CellEditEnded"

Command="{Binding OnCelleditEndedTextCommand}"

CommandParameter="{Binding ElementName=gridViewSharedParameter}"/>

</telerik:EventToCommandBehavior.EventBindings>

I found 2 ways.

The first is how to trigger an event in MVVM by using a button.

1. ViewModel.cs (using button in CellEditEnded event)

private void OnClickLoad(object o)

{

(o as RadGridView).CellEditEnded += ViewModel_CellEditEnded;

}

private void ReadParamFromExcelViewModel_CellEditEnded(object sender, GridViewCellEditEndedEventArgs e)

{

. . . . . . . ~~~~~

}

The second uses Telerik EventBinding.

2. ViewModel.cs (Using Xaml telerik:EventToCommandBehavior.EventBindings)

private void OnCelleditEndedText(object o)

{

var objectItem = o as Telerik.Windows.Controls.RadGridView; //

var currentItem = SharedParameterCurrentItem;

var selectedItem = SharedParameterSelectedItem;

}

I do not prefer the first method.

I want to use it in the second way, can I get the GridViewCellEditEndedEventArgs?

I want to control newdata, olddata, and editaction through GridViewCellEditEndedEventArgs.

+) What is the difference between CurrentItem and SelectedItem? It seems to receive the same value.

Thanks.

GridView

answered on 25 Mar 2021

6 answers

139 views

SamplingUnit of NONE does not disable sampling

I am trying to use Data Sampling with a DateTime-based data series. In my main project, I want to dynamically adjust the sampling unit and interval based on the user's zoom level (e.g.turn off sampling when zoomed in to 1 minute, set sampling to 15 minutes when zoomed out to 1 day).

Explicitly setting my SamplingUnit and SamplingUnitInterval works for any value other than NONE. My data is at 1-second intervals, so Second and NONE should be identical. However, SamplingUnit of NONE samples my data at 4-second intervals.

I have a sample project to demonstrate this, but I don't see how to attach the zip file (I can only attach image files).

Thanks,

Brandon

ChartView

answered on 24 Mar 2021

1 answer

128 views

Disabling DateTime sampling after applied

Hello,

This is related to https://www.telerik.com/forums/samplingunit-of-none-does-not-disable-sampling, but I think a bit more specific of an issue.

I enable Data Sampling with a DateTime-based series by applying a ChartDataSourceStyle. Once I do this, sampling is always applied, even if my threshold allows all data points to be shown - it still goes through to sampling process.

I tried setting the ChartDataSourceStyle to null, expecting sampling to be disabled, but instead the previously-used sampling settings remained applied. For instance, I may have my sampling set to a 5-minute interval, then when I zoom in to a small enough range to set the ChartDataSourceStyle to null, and my data remains sampled at 5-minute intervals.

When profiling my application, it appears that ChartSeriesDescriptor.OnChartDataSourceStyleChanged() ignores a change to a null style, and leaves the series descriptor bindings unchanged. However, ChartSeriesDescriptor.BindItemsSource() does include a check for a null style, and if so binds directly to the ChartSeries rather than the ChartDataSource. Should the null check in ChartSeriesDescriptor.OnChartDataSourceStyleChanged() be removed?

Thanks,

Brandon

ChartView

answered on 24 Mar 2021

1 answer

75 views

we have an issue with RadScheduleView control

hello,

we have an issue with RadScheduleView control
1) we schedule slots of 8 min interval when we scroll down to 11:56 am slot.
on that slot we found bug when we select that slot, half part of that slot get selected not full slot.
that's why our booking mismatch from slot and UI getting thin of that booking
check following screen shot and video for this bug
we need solution on this bug because this bug found on every day on our RadScheduleView control
and send me the solution on email

ScheduleView

answered on 24 Mar 2021

1 answer

84 views

we have an issue with RadScheduleView control

hello,

we have an issue with RadScheduleView control
1) we schedule slots of 8 min interval when we scroll down to 11:56 am slot.
on that slot we found bug when we select that slot, half part of that slot get selected not full slot.
that's why our booking mismatch from slot and UI getting thin of that booking
check following screen shot and video for this bug
we need solution on this bug because this bug found on every day on our RadScheduleView control
and send me the solution on email

ScheduleView

answered on 24 Mar 2021

1 answer

194 views

Set LineSeries ZIndex in Style Trigger

I have several LineSeries on a RadCartesianPlot. When the user selects one of the series, I want to ensure that series is drawn on top of the others, so I would like to set its ZIndex property in a Style Trigger like this:

<Style TargetType="telerik:LineSeries">

<Style.Triggers>

<Trigger Property="IsSelected"

Value="True">

<Setter Property="ZIndex"

Value="999"/>

</Trigger>

</Style.Triggers>

</Style>

However, I cannot set the ZIndex property via a Setter because it is not a DependencyProperty. This post (https://www.telerik.com/forums/setting-zindex-when-using-chartseriesprovider) has a similar issue, and the recommended solution is to create an attached property, but this seems like something that should "just work". In fact, some other posts show setting the ZIndex in a Setter as if it should work (https://www.telerik.com/forums/seriesprovider-and-series-display-order). Can the ZIndex property be changed to a DependencyProperty so we don't have to implement a workaround to use it in a Trigger?

ChartView

answered on 24 Mar 2021

6 answers

769 views

Show all items when SearchText is an empty string

Hello,

how would I go about if I wanted the RadAutoCompleteBox to show all items if the SearchText is empty instead of no items at all?

I had my desired behaviour already implemented using the RadComboBox, which was perfectly fine, despite the fact that I'm dealing with mutliple thousands of items easily and the AutoCompleteBox seems to deal with those amounts of items better than the ComboBox.

What I want is a AutoComplete box that opens upon getting the focus (or upon pressing Ctrl + Space). If the SearchText is populated I want the dropdown to contain the filtered list. But if the SearchText is empty I want the dropdown to show all the entries. Currently it shows none.

To open the dropdown on focus and on ctrl+space is not the problem. Only the contents of the dropdown.

I found guides for silverlight (https://www.telerik.com/forums/display-all-items-on-focus) aswell asp.net (https://www.telerik.com/support/kb/aspnet-ajax/autocompletebox/details/show-all-records-when-focusing-the-input-element-of-autocompletebox) but was not able to adept those solutions fopr WPF.

AutoCompleteBox

answered on 23 Mar 2021

0 answers

123 views

Filter contains a value of List<string>

Hello,

I had made a custom filter in unbound mode for some properties. Boolean properties and enum properties works well, but im trying to filter a proerrty of List<string>. I have made the ItemPropertyDefinition correctly and shows well in the data filter, and I cant select from multiple values, but when I select a value, it does not filter.

Is there any event where I can manipulate the filtering condition? To do something like:

itemsource[x].ListProperty.Any((value) => String.Equals(value, filterSelectedValue));

Or is other way to solve it?

Thank you and kind regards!

DataFilter

asked on 23 Mar 2021

6 answers

155 views

GridView - Differentiate Filtered clear clicked?

Hi,

we have a gridview and with this we have local filtering and sort, but in some columns we have implemented a custom filter.

The thing is when the user clicks on the "Clear Filter" we need to execute some other code, is there any way to differentiate that the user clicked on the "Clear Filter" button?

regards!

GridView

answered on 22 Mar 2021

12 answers

1.3K+ views

RadOpenFolderDialog is super slow

I don't know if it's related to my last post: https://www.telerik.com/forums/radopenfolderdialog-generate-a-lot-of-exception

But that dialog is not usable if it's slow like that. (see video compare to standard windows explorer, https://send.firefox.com/download/9e9308b253d19daf/#Xz4Pj9NHmh7NnG95iTlRRw)

I have a GetForce RTX 2080, I have 4k monitors and I use Windows 1903. And I use WPF UI 2019.3.1023.45

FileDialogs

answered on 22 Mar 2021