Questions on UI for WPF Forum

1 answer

137 views

SnapMode=ClosestPoint on ScatterPointSeries shows multiple points

Hi,

I have a scatter point series with chart track ball enabled and SnapMode set to ClosestPoint, but with multiple series added to the chart I see a point per series.

Each colour in above image is a separate series added from code. The chart itself is in XAML.

                    <telerik:RadCartesianChart Grid.Row="0"   BorderBrush="Transparent" Background="White"  x:Name="radChartView" HorizontalAlignment="Stretch" VerticalContentAlignment="Stretch" DockPanel.Dock="Top">
                        <telerik:RadCartesianChart.Behaviors>
                            <telerik:ChartTrackBallBehavior ShowIntersectionPoints="True" ShowTrackInfo="False" SnapMode="ClosestPoint" />
                        </telerik:RadCartesianChart.Behaviors>
                        <telerik:RadCartesianChart.TrackBallLineStyle>
                            <Style TargetType="Polyline">
                                <Setter Property="Visibility" Value="Collapsed" />
                            </Style>
                        </telerik:RadCartesianChart.TrackBallLineStyle>

                    </telerik:RadCartesianChart>

I've only seen examples of SnapMode=ClosestPoint on LineSeries plots. Should this work on ScatterPointSeries?

Thanks,

Neil

Chart

answered on 12 May 2021

4 answers

311 views

AutoCompleteBox: the OnLostFocus virtual method is not called

Hello,

If we follow the WPF good practices, the `OnLostFocus` method must be called when the control loses focus and it's the job of this method to raise the `LostFocus` event.

In the case of the AutoCompleteBox, the event is raised, but the method is not called. So it's not possible to do some work before the event is raised.

AutoCompleteBox

answered on 12 May 2021

2 answers

235 views

RadPathButton and ContentTemplateSelector

Hello,

I am using the ContentTemplateSelector-Property of the RadPathButton, but nothing happens. Is there some trick to activate this feature?

My xaml:

        <utils:MessageDirectionTemplateSelector x:Key="messageDirectionTemplateSelector">
            <utils:MessageDirectionTemplateSelector.DecEditDataTemplate>
                <DataTemplate>
                    <ContentControl ContentTemplate="{StaticResource icon:outMessage}"/>
                </DataTemplate>
            </utils:MessageDirectionTemplateSelector.DecEditDataTemplate>
            <utils:MessageDirectionTemplateSelector.HexEditDataTemplate>
                <DataTemplate>
                    <ContentControl ContentTemplate="{StaticResource icon:inMessage}"/>
                </DataTemplate>
            </utils:MessageDirectionTemplateSelector.HexEditDataTemplate>
        </utils:MessageDirectionTemplateSelector>


<telerik:RadPathButton Content="{Binding DataContext, RelativeSource={RelativeSource Self}}"
                                       ContentPlacement="Right"
                                       ContentTemplateSelector="{StaticResource messageDirectionTemplateSelector}"/>

The Selector-Class:

public class MessageDirectionTemplateSelector : DataTemplateSelector
{
	public override DataTemplate SelectTemplate(object item, DependencyObject container)
	{
		if (item is MessageItem)
		{
			return Properties.Settings.Default.CanIdHex ? HexEditDataTemplate : DecEditDataTemplate;
		}

		if (item is MessageSignalItem)
		{
			return Properties.Settings.Default.MuxValueHex ? HexEditDataTemplate : DecEditDataTemplate;
		}

		if (item is EnumValueItem)
		{
			return Properties.Settings.Default.EnumValueHex ? HexEditDataTemplate : DecEditDataTemplate;
		}
		return null;
	}
	public DataTemplate HexEditDataTemplate { get; set; }
	public DataTemplate DecEditDataTemplate { get; set; }
}

regards,

Tobias

Buttons

answered on 12 May 2021

0 answers

137 views

Collection was modified; enumeration operation may not execute

Hi,

Getting this exception sometimes and not able to reproduce it. Could you give scenario where this exception is possible? So that we can try to reproduce and fix. Attached screen has busy indicator in each tile . We couldn't get any clue from stack trace.

Thanks in advance.

BusyIndicator

asked on 11 May 2021

1 answer

204 views

Mail Merge Format Fail

Hello,

I have a Word document in docx format and mail merge with Excel in xls format.

The following are mergefields that rendered properly in Word but not when I do mail merge in my code.

{ MERGEFIELD TODAY \@ “MM/dd/yy” }

{ MERGEFIELD BAL \# ####,0.00 }

The following code:

                    using (Stream stream = new FileStream(docxPath +docxFilename, FileMode.Open))
                    {
                        stream.Seek(0, SeekOrigin.Begin);
                        byte[] bytes = new byte[stream.Length];
                        stream.Read(bytes, 0, bytes.Length);

                        templateDocument = new DocxFormatProvider().Import(bytes);
                        IEnumerable mailMergeSource = this.GetMailMergeDataSource(worksheet);
                        mergeDocument = templateDocument.MailMerge(mailMergeSource);
                        this.SaveFile(mergeDocument);
                    }

Above is the main code that do mailmerge

The GetMailMergeDataSource is give below:

        private IEnumerable GetMailMergeDataSource(Worksheet worksheet)
        {
            List<DynamicDataObject> mailMergeSource = new List<DynamicDataObject>();
            string[] fieldNames = new string[worksheet.UsedCellRange.ColumnCount];
            int columnCount;
            int rowCount;
            CellSelection selection;

            for (columnCount = 0; columnCount < worksheet.UsedCellRange.ColumnCount; columnCount++)
            {
                selection = worksheet.Cells[0, columnCount];
                fieldNames[columnCount] = selection.GetValue().Value.RawValue.ToString();
            }

            for (rowCount = 1; rowCount < worksheet.UsedCellRange.RowCount; rowCount++)
            { 
                DynamicDataObject data = new DynamicDataObject();
                for (columnCount = 0; columnCount < worksheet.UsedCellRange.ColumnCount; columnCount++)
                {
                    selection = worksheet.Cells[rowCount, columnCount];
                    data.Set(fieldNames[columnCount], selection.GetValue().Value.RawValue);
                }

                if (columnCount > 0)
                    mailMergeSource.Add(data);
            }

            return mailMergeSource;
        }

DynamicDataaObject is derived from Telerik own's sample document-processing-sdk-master > WordsProcessing

the SaveFile is below:

        private void SaveFile(RadFlowDocument document)
        {
            using (Stream stream = File.OpenWrite(newDocxPath + newDocxFilename))
            {
                DocxFormatProvider formatProvider = new DocxFormatProvider();

                DocxExportSettings exportSettings = new DocxExportSettings
                {
                    AutoUpdateFields = true,
                    InvalidDocumentAction = InvalidDocumentAction.ThrowException
                };
                formatProvider.ExportSettings = exportSettings;
                formatProvider.Export(document, stream);

            }


        }

It works. It merged into another docx document but the Merge Field format failed. But to do the same with Word merge, the resulting file shows proper format.

Let me know if you need full working sample that demo the problem.

Thank,

General Discussions

answered on 11 May 2021

1 answer

148 views

Connect the dots between

Is it possible to connect the dots on the attached image?

I have a chart where the x-axis is time span and the y-axis is double.

On the x-axis I want to show every hour between the stating time span 0h 0 min to the ending time span 23h 59min.

So what I have done is to create a list with all y-axis datapoints and all steps of the x-axis.

Where there are no datapoints on the y-axis I set the double to NaN.

So what I want is to draw a line between the values that are not set to NaN. Or ofcourse if there is another way to resolve this.

Items = new List<CurveItPlotInfo>();

            for (int i = 0; i < 23; i++)
            {
                if (vats.Any(x => x.Time.Hours == i))
                {
                    foreach (var item in vats.Where(x => x.Time.Hours == i))
                    {
                        Items.Add(new CurveItPlotInfo
                        {
                            TimeSpanValue = item.Time,
                            Value = ConvertToDouble(item.Value),
                        });
                    }
                }
                else if (i == 23)
                {
                    Items.Add(new CurveItPlotInfo
                    {
                        TimeSpanValue = TimeSpan.FromMinutes(1439),
                        Value = Double.NaN, 
                    });                
                }
                else
                {
                    Items.Add(new CurveItPlotInfo
                    {
                        TimeSpanValue = TimeSpan.FromHours(i),
                        Value = Double.NaN, 
                    }); ;
                }
            }
 
public class CurveItPlotInfo : ViewModelBase
    {

        private double value;
        private TimeSpan timeSpanValue;

        public double Value
        {
            get { return value; }
            set { SetProperty(ref this.value, value); }
        }

        public TimeSpan TimeSpanValue { get => timeSpanValue; set { SetProperty(ref timeSpanValue, value); } }

    }

<telerik:RadCartesianChart x:Name="CurveItChart" 
                                   Loaded="CurveIt_Loaded"
                                   Grid.Row="0">
            
            <telerik:RadCartesianChart.SmartLabelsStrategy>
                <telerik:ChartSmartLabelsStrategy />
            </telerik:RadCartesianChart.SmartLabelsStrategy>
            
            <telerik:RadCartesianChart.VerticalAxis>
                <telerik:LinearAxis x:Name="verticalAxis" Minimum="{Binding MinValue}" Maximum="{Binding MaxValue}" />
            </telerik:RadCartesianChart.VerticalAxis>
            
            <telerik:RadCartesianChart.HorizontalAxis>
                <telerik:DateTimeCategoricalAxis x:Name="datetimeAxis" 
                                                 SmartLabelsMode="SmartStep"
                                                 MajorTickLength="15"
                                                 PlotMode="OnTicksPadded">
                    <telerik:DateTimeCategoricalAxis.LabelTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Converter={converters:TimeSpanFormatConverter}}" />
                        </DataTemplate>
                    </telerik:DateTimeCategoricalAxis.LabelTemplate>
                </telerik:DateTimeCategoricalAxis>
            </telerik:RadCartesianChart.HorizontalAxis>
            
            <telerik:RadCartesianChart.Series>
                <telerik:LineSeries ValueBinding="Value" CategoryBinding="TimeSpanValue" ItemsSource="{Binding Items}">

                    <telerik:LineSeries.PointTemplate>
                        <DataTemplate>
                            <Border BorderBrush="AliceBlue" BorderThickness="1" >
                                <Rectangle Width="15" Height="15" Fill="Black"
                                           MouseLeftButtonDown="Rectangle_MouseLeftButtonDown" />
                            </Border>
                        </DataTemplate>
                    </telerik:LineSeries.PointTemplate>

                </telerik:LineSeries>
                
            </telerik:RadCartesianChart.Series>
            
        </telerik:RadCartesianChart>

Chart

ChartView

answered on 11 May 2021

1 answer

163 views

disabling the drop indicator on RadTreeView

I have recently been developing a radtreeview and needed the facility to only drop inside a folder, therefore eliminating the requirement for drop before and after. The link above resolved this issue, thank you, though I can still see the graphical orange indicator (line with circle) which is associated with the drop position.

Is it possible to disable this indicator as well?

As an aside issue, it appears that I get highlighted textblocks remaining behind after moving nodes around see the attached image. Do you have advice as to what could cause this?

tree-image

GridView

answered on 11 May 2021

2 answers

166 views

GetValue of SelectedItems in attached property doesnt get SelectedItems why?

Hello,

I have a problem to get the SelectedItems from my radcombobox. I have created an attached property "SelectedItemsHelper" to use the "SelectedItems" property. As a template for the attached property, I 've used this blog post.

My SelectedItemsHelper

using System.Collections;
using System.Windows;
using Telerik.Windows.Controls;

namespace WpfAutoQuery
{
    public class SelectedItemsHelper
    {
        
        public static readonly DependencyProperty SelectedItemsProperty =
            DependencyProperty.RegisterAttached("SelectedItems", typeof(IList), typeof(SelectedItemsHelper), new FrameworkPropertyMetadata((IList)null, new PropertyChangedCallback(OnSelectedItemsChanged)));
              
        public static IList GetSelectedItems(DependencyObject d)
        {
            return (IList)d.GetValue(SelectedItemsProperty);
        }

        public static void SetSelectedItems(DependencyObject d, IList value)
        {
            d.SetValue(SelectedItemsProperty, value);
        }

        private static void OnSelectedItemsChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            var comboBox = sender as RadComboBox;
            if (comboBox != null)
            {                
                IList selectedItems = GetSelectedItems(comboBox);
                if(selectedItems != null)
                {
                    comboBox.SelectedItems.Clear();
                    foreach (var item in selectedItems)
                    {
                        comboBox.SelectedItems.Add(item);
                    }
                }
            }                               
        }
    }
}

My RadComboBox:

<telerik:RadComboBox Name="rcbSection" Grid.Column="1" Grid.Row="2" Grid.ColumnSpan="2" Margin="10" IsEditable="False"
                                       ItemsSource="{Binding Sections}" DisplayMemberPath="Line1" AllowMultipleSelection="True"  
                                       local:SelectedItemsHelper.SelectedItems="{Binding SelectedSections}">                                              
</telerik:RadComboBox>

My "SelectedSections" property in ViewModel

public ObservableCollection<Section> SelectedSections
            {
                get { return GetPropertyValue<ObservableCollection<Section>>(); }
                set { SetPropertyValue(value); }
            }

I have added a jpg, where you can see that i dont get my selected values... Does someone can help me? I dont know what i do wrong...

ComboBox

answered on 07 May 2021

3 answers

1.4K+ views

System.Windows.ResourceDictionary Warning: 9 : Resource not found;

Hello.

When we debug or Run the application it works fine but in output window so many lines are coming with warning

System.Windows.ResourceDictionary Warning: 9 : Resource not found; ResourceKey='AlternativeBrush'; ResourceKey.HashCode='18573990'; ResourceKey.Type='Telerik.Windows.Controls.FluentResourceKey'

System.Windows.ResourceDictionary Warning: 9 : Resource not found; ResourceKey='AlternativeBrush'; ResourceKey.HashCode='18573990'; ResourceKey.Type='Telerik.Windows.Controls.FluentResourceKey'

System.Windows.ResourceDictionary Warning: 9 : Resource not found; ResourceKey='BasicBrush'; ResourceKey.HashCode='1723761'; ResourceKey.Type='Telerik.Windows.Controls.FluentResourceKey'

System.Windows.ResourceDictionary Warning: 9 : Resource not found; ResourceKey='MarkerBrush'; ResourceKey.HashCode='35310062'; ResourceKey.Type='Telerik.Windows.Controls.FluentResourceKey'

When an item is clicked on the parent grid view, the child grid view list is displayed.

Style is not used anywhere. This warning occurs at this time.

Implicit noxaml is in use and is version 2021.1.419.45. (Theme :Fluent)

Thanks.

GridView

answered on 07 May 2021

2 answers

726 views

Custom sorting on RADGRIDVIEW

Dear Team,

In old times i used this code to have a custom sort on a datagridview:

Private Sub DG_RM_SortCompare(sender As Object, e As DataGridViewSortCompareEventArgs) Handles DG_RM.SortCompare
'''' <summary>Gets or sets a value indicating the order in which the compared cells will be sorted.</summary>
'''' <returns>Less than zero if the first cell will be sorted before the second cell; zero if the first cell and second cell have equivalent values; greater than zero if the second cell will be sorted before the first cell.</returns>
If e.Column.Index > 2 Then
Try
If e.CellValue1 Is Nothing OrElse e.CellValue1.Equals(DBNull.Value) Then
If e.CellValue2 Is Nothing OrElse e.CellValue2.Equals(DBNull.Value) Then
e.SortResult = 0
Else
e.SortResult = 1
End If
Else
If e.CellValue2 Is Nothing OrElse e.CellValue2.Equals(DBNull.Value) Then
e.SortResult = -1
Else
e.SortResult = DirectCast(e.CellValue1, IComparable).CompareTo(DirectCast(e.CellValue2, IComparable))
End If
End If
e.Handled = True

Catch ex As Exception
MsgBox(Err.Description)
Close()
End Try
End If
End Sub

Now i need to achieve the same in WPF radgridview.. I have columns, with positive integers, zeroes and NULLs too.

Basically if i order : NULLs come first , then zeroes, then numbers ASC.

In my case customer needs to see in this way: zeroes, positive numbers asc, and nulls at the end.

The datasource is a datatable passed to radgridview as itemsource, and the column names (and number of them) are always dynamic, so i cannot predefine them in the XAML section. Please help

Thanks!

Peter B. (Hungary)

GridView

answered on 06 May 2021