Questions on UI for WPF Forum

6 answers

889 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

155 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

199 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

1.4K+ 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

1 answer

239 views

Past Dates Not Visible in RadDatepicker.

Hi,

Im using RadDatepicker for from date and to date, In from date, im using DisplayDateEnd as ValidTo and in to date, im using DisplayDateStart as ValidFrom, its works fine based on the date selection of valid from and valid to, but how can i see the dates which are not visible.

I want to see the dates in calender with disabled mode of past and future dates.

Thanks,

Karthick.

DatePicker

answered on 22 Mar 2021

7 answers

210 views

Moving the sub-diagrams in the diagram(TreeLayout) to another row

Good afternoon.
We have a diagram (Tree Layout). Our diagram consists of separate sub-diagrams with no connection between them. Why does the last item automatically go to the second row (in the attach file, it is highlighted in red)? Could you tell me how this can be avoided? We need all the sub-diagrams to be placed in one line.

Diagram

answered on 22 Mar 2021

1 answer

392 views

Modern wpf UI frameworks

Hello everyone. I'm working as a .Net developer for a small start-up and we're about to start development on an application that has to be modern looking. I've worked with MahApps before, and am also aware of the material design library. Does anyone has another cool framework to check out? Even just a small one for specific UI components.
By the way I'm planning to use MVVM light and nHibernate if it's relevant.

General Discussions

answered on 22 Mar 2021

2 answers

1.0K+ views

[Solved] TreeViewItem Command binding

Hello,

I have a treeView and I want to bind each item command, command parameter and IsEnabled properties. If I bind just the IsEnabled property it works, but if I add the command binding, the command works, but IsEnabled binding breaks.

I use the following code:

<telerik:RadTreeView ItemsSource="{Binding TreeViewModel.Categories}"

Grid.Row="0">

<telerik:RadTreeView.ItemTemplate>

<HierarchicalDataTemplate ItemsSource="{Binding SubCategories}">

<StackPanel Orientation="Horizontal">

<TextBlock VerticalAlignment="Center" Text="{Binding Name}" />

</StackPanel>

</HierarchicalDataTemplate>

</telerik:RadTreeView.ItemTemplate>

<telerik:RadTreeView.ItemContainerStyle>

<Style TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">

<Setter Property="IsEnabled" Value="{Binding IsEnabled}"/>

<Setter Property="Command" Value="{Binding Path=DataContext.GoToTabCommand, RelativeSource={RelativeSource AncestorType=telerik:RadWindow}}" />

<Setter Property="CommandParameter" Value="{Binding Name}" />

</Style>

</telerik:RadTreeView.ItemContainerStyle>

</telerik:RadTreeView>

How can I make both bindings to work?

TreeView

answered on 22 Mar 2021

4 answers

417 views

SpreadSheet Cell changed event infinite loop.

Hello.

When using the Cell Change Event, if you use ClearFill(), it takes an infinite loop. Is there any way to prevent this?

xaml - radspreadsheet < ActiveSheetChanged="radSpreadsheet_ActiveSheetChanged" />

C# Code

private void radSpreadsheet_ActiveSheetChanged(object sender, EventArgs e)

{

radSpreadsheet.ActiveWorksheet.Cells.CellPropertyChanged += cells_CellPropertyChanged;

}

private void cells_CellPropertyChanged(object sender, CellPropertyChangedEventArgs e)

{

var isSameValue = e.Property.UseSameValueAsPreviousOnInsert;

var column = e.CellRange.FromIndex.ColumnIndex;

var row = e.CellRange.FromIndex.RowIndex;

CellSelection cell = (sender as Cells)[row, column];

var value = cell.GetValue().Value.RawValue;

if (string.IsNullOrEmpty(value))

{

cell.SetFill(Defines.RedFill);

if (column == 2)

{

cell.Worksheet.Rows[row].Remove();

}

else if (value == Defines.NoParam)

{

cell.SetFill(Defines.YellowFill);

}

else

{

cell.ClearFill(); // This cellChanged event loop.

}

Thanks.

Spreadsheet

answered on 19 Mar 2021

1 answer

168 views

[Solved] RadComboBoxItemAutomationPeer doesn't get IsSelected properly

Hello,

I'm using Telerik WPF R1 2021.

I'm using Automation to test our GUI and I came accross a problem from the RadComboBoxItemAutomationPeer

The property IsSelected isn't correctly retrieve when the RadComboBox is used with multiple selection as it uses the property "SelectedItem" and not "SelectedItems" to check the selection.

I don't want to override the whole Combobox to fix that so I will manage this some other way but if you think of another solution i'm all ears ;)

Regards,

Thomas

ComboBox

answered on 18 Mar 2021