Questions on UI for WPF Forum

0 answers

93 views

Support for CommunityToolkit.Mvvm ObservableProperty in WPF PropertyGrid control

I created a class with CommunityToolkit.Mvvm package and use ObservableProperty to create properties for this class. But the PropertyGrid control does not recognize properties created in this way. Are there any way PropertyGrid can support ObservableProperty?

using CommunityToolkit.Mvvm.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace Test
{
    public partial class DrawingModel : ObservableObject
    {
        public string Name { get; set; }

        [ObservableProperty]
        public double _length;


        [ObservableProperty]
        public double _width;

        [ObservableProperty]
        public double _height;
    }
}

PropertyGrid

asked on 24 Jun 2024

1 answer

51 views

Icons not showing in History Pane of RadFileDialog Window

Please see attached image. What could be the cause of this? Some Fonts missing?

I'm using StyleManager for Theming.

FileDialogs

answered on 20 Jun 2024

2 answers

86 views

Creating a RadDocument from XAML string

I have a XAMLDataProvider that is binding a string property to a RadRichTextBox.

I want to be able to bind the content of the RadRichTextBox to a string (which I have done) and then once a save button is pressed, I need to run some code similar to this.

Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider provider = new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();
RadDocument document = new RadDocument(string myXAMLString);
byte[] output = provider.Export(document);

Essentially I need to be able to bind a property from the ViewModel to RadRichTextBox..... which I am doing with XAML data provider.

Then after a save button is clicked, I take the property which is a string and I need to create a RadDocument from the string that represents that and export that document to a byte[].

Is there an easier and better way to be doing this?

Thanks!

RichTextBox

answered on 20 Jun 2024

1 answer

250 views

Is TouchDragTrigger no longer available (it is missing in 2024.2.514.70) ?

It is not in Telerik.Windows.Controls.dll for WPF70 2024.2.514.70

GridView

answered on 20 Jun 2024

2 answers

59 views

RadCartesianChart LinearAxis DateFormat Germany?

Hi,

i found a sample:

    <Window.Resources>
        <local:DoubleToDateTimeLabelConverter x:Key="DoubleToDateTimeLabelConverter" />
    </Window.Resources>
    <Grid>
        <telerik:RadCartesianChart>
            <telerik:RadCartesianChart.HorizontalAxis>
                <telerik:LinearAxis>
                    <telerik:LinearAxis.LabelTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding StringFormat='h:MM tt', Converter={StaticResource DoubleToDateTimeLabelConverter}}" />
                        </DataTemplate>
                    </telerik:LinearAxis.LabelTemplate>
                </telerik:LinearAxis>
            </telerik:RadCartesianChart.HorizontalAxis>
            
            <telerik:RadCartesianChart.VerticalAxis>
                <telerik:CategoricalAxis />
            </telerik:RadCartesianChart.VerticalAxis>
            
            <telerik:LineSeries CategoryBinding="City" ValueBinding="StartTimeOA" ItemsSource="{Binding}" />
        </telerik:RadCartesianChart>
    </Grid>

        public MainWindow()
        {
            InitializeComponent();

            var Items = new ObservableCollection<PlotItemViewModel>();
            var dateTime = DateTime.Now;
            Items.Add(new PlotItemViewModel() { City = "Atlanta", StartTime = dateTime.AddMinutes(5) });
            Items.Add(new PlotItemViewModel() { City = "Atlanta", StartTime = dateTime.AddMinutes(10), });
            Items.Add(new PlotItemViewModel() { City = "New York", StartTime = dateTime.AddMinutes(100), });
            Items.Add(new PlotItemViewModel() { City = "Miami", StartTime = dateTime.AddMinutes(120), });
            Items.Add(new PlotItemViewModel() { City = "Miami", StartTime = dateTime.AddMinutes(150), });
            Items.Add(new PlotItemViewModel() { City = "Savannah", StartTime = dateTime.AddMinutes(200), });
            Items.Add(new PlotItemViewModel() { City = "Birmingham", StartTime = dateTime.AddMinutes(250), });
            Items.Add(new PlotItemViewModel() { City = "New Orleans", StartTime = dateTime.AddMinutes(280), });

            this.DataContext = Items;
        }
    }

    public class PlotItemViewModel
    {
        public string City { get; set; }
        public DateTime StartTime { get; set; }
        public double StartTimeOA { get { return this.StartTime.ToOADate(); } }
    }

    public class DoubleToDateTimeLabelConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double doubleValue = double.Parse(value.ToString());
            return DateTime.FromOADate(doubleValue);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

The Result is:

Here is the Dateformat "us-US" (10:05 AM / 4:06 PM) but i need German "de-DE" (10:05 / 16:06) !

Have anyone a idea how i can do this?

Best regards

Bernd

ChartView

answered on 19 Jun 2024

1 answer

79 views

WPF RadGridView OnCellEditEnded with Custom column NewData and OldData are always empty

We have the similar problem on 2024.1.228.45
https://www.telerik.com/forums/gridview-celleditended-returns-null-data-properties-for-custom-column

Is there any solution to get NewData and OldData on OncellEditEnded for a custom column?

GridView

answered on 18 Jun 2024

0 answers

40 views

Changing table properties in code after calling InsertTable()

I have a button which inserts a table.

myRichTextBox.InsertTable(2,4)

I want to modify some properties on the table after it is inserted.

I want to set fontsize, fontfamily, change border and cell color to RED and make it so that the table will always fill the available width. Is this a possibility? Or do I have to manually build out the entire table and insert at cursor location?

RichTextBox

asked on 17 Jun 2024

0 answers

68 views

Removing Tabs programmatically.

Hello,

I'm trying to remove tab items from RadTabControl where ItemsSource is bound to an ObservableCollection<RadTabItem>. However, when an item is deleted from the collection the tab does not disappear. The desired behavior is for the tab to disappear. What do I need to do to achieve this?

Here's what I have:

xaml declaration:

 <telerik:RadTabControl x:Name="radTabControl"  
                     
                                ItemsSource="{ Binding Tabs }"
                                Padding="0, 0, 0, 0" 
                                Margin="0, 0, 0, 0" >

         </telerik:RadTabControl>

Here, I declare Tabs as an observable collection:

   public ObservableCollection<RadTabItem> Tabs { get; set; }

Here is where the tab items are deleted:

  private void RemoveTab(int dev)
        {
                Tabs.Clear();
 
        }

I'm not very familiar with WPF and Telerik in general. Any help would be appreciated.

Thanks.

TabControl

asked on 11 Jun 2024

2 answers

87 views

RadGridView randomly changes cell content

Hi,

I'm using the CellLoaded event to customize a RadGridView. Setting a background brush and foreground + fontweight for the TextBlock in the cell works as expected. I'm also using the AutoGeneratingColumn event to set a DataTemplate for a column.

Now I want to use DataTemplates for individual cells. But when I do so I have to set a DataTemplate for every cell, every time it's rendered. If I'm not setting a DataTemplate I get a random content from a random cell, everytime a cell is scrolled into view. If I'm using DataTemplates for all cells I can't edit the cells anymore.

Is there anything I can do to stop the RadGridView messing up my cells? Changing the virtualization settings didn't changed anything, even if I disabled virtualization (VirtualizingPanel.IsVirtualizing="False").

This is my GridView now:

<telerik:RadGridView AutoGenerateColumns="True"
                     VirtualizingPanel.VirtualizationMode="Recycling"                                     
                     Grid.Row="1"
                     x:Name="Gv"
                     Margin="0 20 10 0"
                     SelectionMode="Extended"
                     SelectionUnit="Cell"
                     CellLoaded="GvCellLoaded"
                     BeginningEdit="GvEditBegins"
                     CellEditEnded="CellEditEnded"
                     AutoExpandGroups="True"
                     GroupRenderMode="Flat"
                     ValidatesOnDataErrors="None"
                     telerik:TouchManager.TouchMode="None"
                     CanUserSortColumns="False"
                     CanUserSortGroups="False"
                     IsReadOnly="False"
                     AllowDrop="True"
                     ItemsSource="{Binding Items}"
                     FrozenColumnsSplitterVisibility="Collapsed"
                     ContextMenuOpening="GvContextMenuOpening"
                     ScrollViewer.VerticalScrollBarVisibility="Visible"
                     ScrollViewer.HorizontalScrollBarVisibility="Visible"
                     PreviewMouseRightButtonDown="GvRightMouseDown"
                     PreviewMouseLeftButtonDown="GvMouseDown"
                     PreviewMouseLeftButtonUp="GvMouseUp"
                     AutoGeneratingColumn="GvAutoGenerate">

GridView

answered on 11 Jun 2024

1 answer

490 views

.NET 8 support?

I was surprised when I downloaded the latest Q2 release to not find any folder with .NET 8 DLLs, only .NET 7.

NET 7 is already at "End of Support" as of May 14th according to Microsoft.

https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core

Considering NET 8 is designated as having LTS (long term support) from Microsoft I was wondering what Telerik's plans are regarding a NET 8 release of your WPF suite?

We would like to move from .NET 6 which we currently use, to .NET 8 which has LTS.

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