Questions on UI for WPF Forum

1 answer

170 views

RadEntityFrameworkCoreDataSource and RadGridView

Hello,

I'm trying to set up a RadGridView to display a RadEntityFrameworkCoreDataSource source using code-behind (currently a requirement) and cannot get the grid to populate with any data. I can access the data by using LINQ just fine, and can populate the grid using a ToList() version of that data, but I believe that it's just a copy of the data, and cannot be modified and saved to the original context.

Here's an example of what I'm trying to do:

var options = new DbContextOptionsBuilder<Test_Context>();
options.UseSqlServer(ConnectionString);
using var testContext= new Test_Context(options.Options);

RadEntityFrameworkCoreDataSource source = new()
{
    Name = "coreDataSource",
    DbContext = testContext,
    QueryName = "TblCustomer"
};

// This doesn't populate the grid
rgvCustomers.ItemsSource = source.DataView;
                
// This populates the grid
var customerList = textContext.TblCustomer.Where(customer => customer.Id != -1).ToList();
rgvCustomers.ItemsSource = customerList ;

How do I get the RadEntityFrameworkCoreDataSource to query the data so that it can populate the grid?

Also, how would I go about only querying the customers with an Id != -1 using said Data Source? Is that as simple as setting the filters, then querying?

I'm new to this, so apologies if I've missed a simple step.

GridView

answered on 20 Dec 2022

1 answer

199 views

Bind multiple searching values in autocomplete box

<telerik:RadAutoCompleteBox TextSearchMode="Contains" SelectedItem="{Binding Entity, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" DisplayMemberPath="Name" HorizontalAlignment="Stretch" SelectionMode="Single" Margin="125,100,0,10" VerticalAlignment="Top" Width="Auto" Grid.Column="0" Name="customerACB" SearchTextChanged="customerACB_SearchTextChanged" AutoCompleteMode="Suggest" >
<telerik:RadAutoCompleteBox.DropDownItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Label Content="{Binding Code}" Width="70" />
<Label Content="{Binding Name}" Width="310" />
</StackPanel>
</DataTemplate>
</telerik:RadAutoCompleteBox.DropDownItemTemplate>
</telerik:RadAutoCompleteBox>

Currently, i am able to search using "Name". If I change displaymemberpath to code it will show the result if the search string match with "code"
I need to search using both values "Name" and "code".

AutoCompleteBox

answered on 16 Dec 2022

3 answers

770 views

RadGridView - ToolTip for Dynamically Created Column

Hi -

I have a RadGridView that populates dynamically based on columns present in an Excel spread-sheet. I'm able to create the columns but not having luck getting the ToolTip to display.

Thanks in advance - Jon

Here is my code snippet:

foreach (DataColumn column in dt.Columns)
{
Telerik.Windows.Controls.GridViewDataColumn gridviewDataColumn = new Telerik.Windows.Controls.GridViewDataColumn
{
Header = column.ColumnName,
Name = column.ColumnName,
DataMemberBinding = new System.Windows.Data.Binding(column.ColumnName),
// Tooltip = ???
};

dtg_PreviewMapGrid.Columns.Add(gridviewDataColumn);
}
dtg_PreviewMapGrid.ItemsSource = dt;

GridView

updated answer on 15 Dec 2022

0 answers

116 views

Print year calendar with some days marked

Hi,

I am looking for a component to print a Year Calendar with selected days marked.

Just printing, no dialogboxes etc.

Is there a component and an example how to do this?

Kind regards,
André

Calendar

asked on 14 Dec 2022

1 answer

112 views

Taskboard with ItemTemplate definition, getting error "Both 'ContentTemplate' and 'ContentTemplateSelector' are set"

Hi,
Using Telerik.UI.for.Wpf.NetCore.Xaml (2022.3.912).
I'm getting an error for the taskboard the first time it loads
Both 'ContentTemplate' and 'ContentTemplateSelector' are set; 'ContentTemplateSelector' will be ignored. RadTaskBoardItem:'RadTaskBoardItem' (Name='')
this error as many as the Item task that appears.

Then when I exit and return to the taskboar page, another error appears:
Cannot find source: RelativeSource FindAncestor, AncestorType='Telerik.Windows.Controls.RadTaskBoard', AncestorLevel='1'

        <telerik:RadTaskBoard x:Name="RadTaskBoard01"  Grid.Row="3" 
                              ItemsSource="{Binding TaskboardCollView}" 
                              GroupMemberPath="State"
                              Background="{StaticResource StripeColor}" 
                              AutoGenerateColumns="False">
            <telerik:RadTaskBoard.DragDropBehavior>
                <localservice:CustomTaskBoardDragDropBehavior/>
            </telerik:RadTaskBoard.DragDropBehavior>
            <telerik:RadTaskBoard.Columns>
                <telerik:TaskBoardColumn GroupName="NEW" Header="Red"  />
                <telerik:TaskBoardColumn GroupName="INPROGRESS" Header="Yellow" />
                <telerik:TaskBoardColumn GroupName="REVIEWED" Header="Gray" />
                <telerik:TaskBoardColumn GroupName="DONE" Header="ForestGreen" />
            </telerik:RadTaskBoard.Columns>
            <telerik:RadTaskBoard.ColumnHeaderTemplate >
                <DataTemplate>
                    <Grid>
                        <Grid.ColumnDefinitions >
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <Border  Width="17" Grid.Column="0" Background ="{Binding Header}"  BorderThickness="1" BorderBrush="Black" CornerRadius="10" ></Border>
                        <TextBlock Grid.Column="1" Text="{Binding GroupName}"  HorizontalAlignment="Left"  />
                        <TextBlock Grid.Column="2" Margin="10 ,0 ,10, 0" Text="{Binding Items.Count}" HorizontalAlignment="Right" />
                    </Grid>
                </DataTemplate>
            </telerik:RadTaskBoard.ColumnHeaderTemplate>
            <telerik:RadTaskBoard.ItemTemplate>
                <DataTemplate>
                    <Grid >
                        <Grid.ColumnDefinitions >
                            <ColumnDefinition Width="5"/>
                            <ColumnDefinition/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions >
                            <RowDefinition/>
                            <RowDefinition Height="25"/>
                        </Grid.RowDefinitions>
                        <Grid Grid.Row="0" Grid.RowSpan="2" Grid.Column ="0" 
                              Background="{Binding CategoryName, Converter={StaticResource CategoryToColour}}">
                        </Grid>
                        <StackPanel  Grid.Row="0"  Grid.Column ="1" >
                            <TextBlock Text="{Binding Parenttitle}"  Margin="15,0,5,0"   Foreground="{StaticResource StripeColor}"  FontSize="16" TextWrapping="Wrap"  />
                            <StackPanel Visibility="{Binding Isparent, Converter={StaticResource BoolToVisible}}">
                                <TextBlock Text="Have Sub Task"
                                           HorizontalAlignment="Right"
                                           Margin="0,0,5,0"
                                           Foreground="Red"
                                           FontWeight="Bold"
                                           FontStyle ="Italic" 
                                           FontSize="12" />
                            </StackPanel>
                            <StackPanel Visibility="{Binding Title, Converter={StaticResource EmptyToVisible }}">
                                <TextBlock Text="{Binding Title}"
                                           Margin="15,0,5,0"
                                           Foreground="Brown"
                                           TextWrapping="WrapWithOverflow"
                                           FontSize="14" />
                            </StackPanel>
                            <TextBlock Text="{Binding Description}"
                                       Margin="15,0,5,0"
                                       TextWrapping="Wrap"
                                       FontSize="14" />
                        </StackPanel>

                        <TextBlock Text="{Binding Assignee}"  Grid.Row="1"   Grid.Column ="1" Margin="15,0,15,0" Foreground="ForestGreen"      
                                   FontSize="16" FontStyle="Italic"  HorizontalAlignment="Right" VerticalAlignment="Bottom" />
                    </Grid>
                </DataTemplate>
            </telerik:RadTaskBoard.ItemTemplate>
        </telerik:RadTaskBoard>

TaskBoard

answered on 13 Dec 2022

1 answer

107 views

Change DragVisual Template in OnGiveFeedback event

Hello!
I want to change DrageVisual Template in OnGiveFeedback event instead of set e.SetCursor(Cursors.Cross); Is it possible?

I am setting DragVisual like this

        private void OnDragInitialize(object sender, DragInitializeEventArgs e)
        {
           
                e.DragVisual =new ContentControl { Name = "DragVisual", ContentTemplate = 
                this.AssociatedObject.Resources["DraggedItemTemplate"] as DataTemplate, DataContext = items.Count() };
                e.DragVisualOffset = e.RelativeStartPoint;
                e.AllowedEffects = DragDropEffects.All;          
                e.Handled = true;
                
            }
        }

And then set cursor type in this method

        private void OnGiveFeedback(object sender, Telerik.Windows.DragDrop.GiveFeedbackEventArgs e)
        {            
            if (e.Effects == DragDropEffects.Move)
            {
                e.UseDefaultCursors = false;
                e.SetCursor(Cursors.Arrow);
            }
            else if (e.Effects == DragDropEffects.None)
            {                
                e.UseDefaultCursors = false;
                e.SetCursor(Cursors.Cross);
            }
            else
            {
                e.UseDefaultCursors = true;
            }
            e.Handled = true;
        }

DragAndDrop

answered on 12 Dec 2022

2 answers

118 views

TimeIndicator ScheduleView Binding

How do I bind the DateTime Property (return value for GetDateTime())

of a class implementing ITimeIndicator to a Property of my ViewModel?

my thoughts:

         <telerik:RadScheduleView.TimeIndicatorsCollection>
            <telerik:TimeIndicatorsCollection>
               <local:CustomTimeIndicator Location="WholeArea" Now="{Binding CurrentNow}" />
            </telerik:TimeIndicatorsCollection>
         </telerik:RadScheduleView.TimeIndicatorsCollection>

public class CustomTimeIndicator : DependencyObject, ITimeIndicator
{
   public static readonly DependencyProperty NowProperty = DependencyProperty.RegisterAttached("Now", typeof(DateTime), typeof(CustomTimeIndicator));

   public DateTime Now
   {
      get => (DateTime)GetValue(NowProperty);
      set => SetValue(NowProperty, value);
   }

   public DateTime GetDateTime()
   {
      return Now;
   }

   public TimeSpan Offset { get; set; }

   public CurrentTimeIndicatorLocation Location { get; set; }
}

Gives me:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=CurrentNow; DataItem=null; target element is 'CustomTimeIndicator' (HashCode=47896050); target property is 'Now' (type 'DateTime')

ScheduleView

answered on 09 Dec 2022

1 answer

116 views

telerik:ValidationErrorTemplateHelper.ShowWhenFocused = "True" doesn't work on RadDateTimePicker with Theme="Expression_Dark"

Hello：

About the RadDateTimePicker,

when I set the telerik:ValidationErrorTemplateHelper.ShowWhenFocused = "True"

It only doesn't work on Theme="Expression_Dark".

The others themes seems no problem.

DateTimePicker

answered on 08 Dec 2022

0 answers

174 views

SyntaxEditor cannot more, than change Foreground by custom Tagger

Hi,

editor.TextFormatDefinitions.AddLast("Brace", new TextFormatDefinition(null, Brushes.Black));
...
MultilineTags.Add(new TagSpan<ClassificationTag>(tempSnapshotSpan, new ClassificationTag(new ClassificationType("Brace"))));

Nothing special - RadSyntaxEditor and those two lines in WPF. Foreground is working very well - I can highlight any part of my text as I wish. But border and background does not working ... And also unwanted behavior - foreground of other highlighting is reset when I try highlight by background change... Even just border highlighting would be sufficient ... (I want highlight closest braces.)

Update:

Working brace content highlighter:

internal class ExpressionTagger : CSharpTagger
{
    const string
        openBraces = "([{",
        closeBraces = ")]}";

    new RadSyntaxEditor Editor => (RadSyntaxEditor)base.Editor;

    public ExpressionTagger(RadSyntaxEditor editor) : base(editor)
    {
        editor.TextFormatDefinitions.AddLast("Class", new TextFormatDefinition(new SolidColorBrush(Color.FromRgb(43, 145, 175))));
        editor.TextFormatDefinitions.AddLast("Brace", new TextFormatDefinition(new SolidColorBrush(Color.FromRgb(155, 83, 105))));
        AddWord("Field", new ClassificationType("Class"));
        AddWord("Custom", new ClassificationType("Class"));
        AddWord("Triggers", new ClassificationType("Class"));
        StringMatchingRegex = String.Empty; // Nemá smysl, neumí najít co chceme.
        editor.CaretPosition.PositionChanged += CaretPosition_PositionChanged;
        editor.KeyDown += CaretPosition_PositionChanged;
        editor.KeyUp += CaretPosition_PositionChanged;
    }

    private void CaretPosition_PositionChanged(object sender, EventArgs e)
    {
        if (Editor.CaretPosition.Index < Document.CurrentSnapshot.Span.End)
        {
            char currentChar = Document.CurrentSnapshot.GetText(new Span(Editor.CaretPosition.Index, 1))[0];
            if (MultilineTags.Any(tag => tag.Tag.ClassificationType.Name == "Brace") ||
                (KeyboardModifiers.IsAltDown && (openBraces.Contains(currentChar) || closeBraces.Contains(currentChar))))
            {
                InvalidateMultilineTags();
            }
        }
    }

    protected override void RebuildMultilineTags()
    {
        base.RebuildMultilineTags();

        string text = Editor.Document.CurrentSnapshot.GetText();
        foreach (Match literal in Regex.Matches(text, "\"(?:[^\"]|\"{2})*\""))
        {
            TextSnapshotSpan tempSnapshotSpan = new TextSnapshotSpan(Document.CurrentSnapshot,
                new Span(literal.Groups[0].Index, literal.Groups[0].Length));
            MultilineTags.Add(new TagSpan<ClassificationTag>(tempSnapshotSpan, new ClassificationTag(ClassificationTypes.StringLiteral)));
        }
        if (KeyboardModifiers.IsAltDown)
        {
            int
                startIndex = Editor.CaretPosition.Index,
                searchIndex = 1,
                closeIndex = 0;
            char currentChar = Document.CurrentSnapshot.GetText(new Span(Editor.CaretPosition.Index, 1))[0];

            int braceIndex = openBraces.IndexOf(currentChar);
            if (braceIndex > -1)
            {
                char
                    openBrace = currentChar,
                    closeBrace = closeBraces[braceIndex];
                closeIndex = startIndex + 1;

                while (searchIndex > 0 && closeIndex < text.Length)
                {
                    currentChar = text[closeIndex];
                    if (currentChar == openBrace)
                    {
                        searchIndex++;
                    }
                    if (currentChar == closeBrace)
                    {
                        searchIndex--;
                    }
                    closeIndex++;
                }
                closeIndex--;
                currentChar = char.MinValue; // reset
            }
            braceIndex = closeBraces.IndexOf(currentChar);
            if (braceIndex > -1)
            {
                char
                    openBrace = openBraces[braceIndex],
                    closeBrace = currentChar;
                closeIndex = startIndex;
                startIndex--;

                while (searchIndex > 0 && startIndex > 0)
                {
                    currentChar = text[startIndex];
                    if (currentChar == closeBrace)
                    {
                        searchIndex++;
                    }
                    if (currentChar == openBrace)
                    {
                        searchIndex--;
                    }
                    startIndex--;
                }
                startIndex++;
            }
            if (searchIndex == 0) // Found
            {
                TextSnapshotSpan tempSnapshotSpan = new TextSnapshotSpan(Document.CurrentSnapshot,
                    new Span(startIndex, closeIndex - startIndex + 1));
                MultilineTags.Add(new TagSpan<ClassificationTag>(tempSnapshotSpan, new ClassificationTag(new ClassificationType("Brace"))));
            }
        }
    }
}

Just it is ugly, because I am able only to change Foreground. How can I at least use Find border boxes or any better highlight option?

SyntaxEditor

updated question on 08 Dec 2022

0 answers

123 views

Custom Timeline Interval on UI for WPF

We have implemented custom timeline intervals for radtimeline which was working fine with earlier version of Telerik framework(2019) but after the upgrade to latest(R3 2022 SP1) Telerik framework, with custom intervals the timeline is not loading when customization is removed it works fine(default timeline intervals).

Is there any change with new framework we should be considering?

We are currently testing out the Telerik Upgrade with Demo version of the framework(R3 2022 SP1). Could this be an issue?

TimeLine

asked on 07 Dec 2022