Questions on UI for WPF Forum | Telerik Forums

or

25,631 questions

1 answer

66 views

QueryableDomainServiceCollectionView

Dear Telerik Support

I just started using your controls for WPF, to see if it suits the needs of our company

Starting by doing basic examples, I stumbled upon the RadGridView pagination

I am trying to use this example

http://demos.telerik.com/silverlight/#DomainDataSource/MVVM and

and this documentation

http://docs.telerik.com/devtools/wpf/controls/raddatapager/getting-started#adding-raddatapager

But it seems my grid wont page if I dont use this

   this.view = new QueryableDomainServiceCollectionView<Customer>(context, getCustomersQuery);

   this.view.PageSize = 10;

thus attributing the PageSize to it.

right now I use a ObservableCollection<Entity> List.

So my question is: Where how can I use the above mentioned class (QueryableDomainServiceCollectionView) to support my need of pagination?

I don't want to paginate it manually, by using the Unbound mode. and I would prefer to avoid that all data goes into memory

I will attach the code of my sample project here. Not you must install the PropertyChanged.Fody in order to run it.

answered on 10 Mar 2016

2 answers

179 views

[Solved] RadGridView export to Excel creates empty file

<t:RadGridView x:Name="Logs">

<t:RadGridView.Columns>

<t:GridViewDataColumn CellTemplateSelector="{StaticResource IconTemplateSelector}" />

<t:GridViewDataColumn DataMemberBinding="{Binding LogLevel,Mode=OneWay}" Header="Level"

CellStyle="{StaticResource PaddedCell}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding LogID,Mode=OneWay}"

Header="LogID"/>

<t:GridViewDataColumn DataMemberBinding="{Binding MachineDateTime,Mode=OneWay}"

Header="Machine Time"

CellStyle="{StaticResource PaddedCell}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding Occured, Mode=OneWay}"

Header="Occured"

CellStyleSelector="{StaticResource ColorSelector}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding System,Mode=OneWay}"

Header="System"

CellStyle="{StaticResource PaddedCell}" />

<t:GridViewDataColumn DataMemberBinding="{Binding Mode,Mode=OneWay}"

Header="Mode"

CellStyle="{StaticResource PaddedCell}" />

<t:GridViewDataColumn DataMemberBinding="{Binding CallingClass,Mode=OneWay}"

Header="Calling Class"

CellStyle="{StaticResource PaddedCell}" />

<t:GridViewDataColumn DataMemberBinding="{Binding Message,Mode=OneWay}"

Header="Message"

CellStyle="{StaticResource PaddedCell}" />

<t:GridViewDataColumn DataMemberBinding="{Binding Exception,Mode=OneWay}"

Header="Exception"

CellStyle="{StaticResource PaddedCell}" />

</t:RadGridView.Columns>

</telerik:RadGridView>

I have above data-bound RadGridView (named Logs) and I am trying to export its contents, but it always results into an empty exported file.

And I try to export the contents of RadGridView with below code:

private void ExportLogs()

{

using (var stream = File.Create(filepath))

{

Logs.Export(stream,

new GridViewExportOptions()

{

Format = ExportFormat.ExcelML,

ShowColumnHeaders = true,

ShowColumnFooters = false,

ShowGroupFooters = false,

});

}

}

No exceptions or warning received.
Any help would be appreciated. Thank you.

answered on 10 Mar 2016

1 answer

230 views

PDFViewer Document

Hello

Why this doesn't work?

var document = new RadFixedDocument();

var page = document.Pages.AddPage();

var editor = new FixedContentEditor(page);

editor.DrawText("Hello world");

PdfViewer.Document = document;

It causes the following exception:

An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.Windows.Controls.FixedDocumentViewers.dll

em Telerik.Windows.Controls.FixedDocumentViewerBase.AttachToDocumentEvents(RadFixedDocument document)

em Telerik.Windows.Controls.FixedDocumentViewerBase.OnDocumentChanged(RadFixedDocument oldValue, RadFixedDocument newValue)

em Telerik.Windows.Controls.FixedDocumentViewerBase.<.cctor>b__1(DependencyObject s, DependencyPropertyChangedEventArgs e)

em System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

em System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

em System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

answered on 10 Mar 2016

3 answers

132 views

display title/header beginning of each stepline of cartesianchart



I Would like to bind title/header beginning of each line of chart from data source.I already binded with required display with legend and it is working fine but i need help to display at beginging of each line series.Please help it..please refer image...
 
<telerik:RadCartesianChart.SeriesProvider>                
             <telerik:ChartSeriesProvider Source="{Binding Data}">                    
                 <telerik:ChartSeriesProvider.SeriesDescriptors>
                     <telerik:CategoricalSeriesDescriptor  ItemsSourcePath="LineData" ValuePath="Value" CategoryPath="Vector" >
                         <telerik:CategoricalSeriesDescriptor.Style>
                             <Style TargetType="telerik:StepLineSeries">
                                 <Setter Property="StrokeThickness" Value="2"/>
                                 <Setter Property="ShowLabels" Value="False"/>
                                 <Setter Property="PointTemplate" Value="{StaticResource LinePointTemplate}"/>
                                 <Setter Property="LegendSettings">
                                     <Setter.Value>
                                         <telerik:SeriesLegendSettings  x:Name="l" Title="{Binding Name}"/>
                                     </Setter.Value>
                                 </Setter>
                                 <Setter Property="VerticalAxis">
                                     <Setter.Value>
                                         <telerik:LinearAxis Title="{Binding Name}" LabelTemplate="{StaticResource YLabelTemplate}"   
                                   />
                                     </Setter.Value>
                                 </Setter>
                             </Style>
                          
                         </telerik:CategoricalSeriesDescriptor.Style>
                     </telerik:CategoricalSeriesDescriptor>
                 </telerik:ChartSeriesProvider.SeriesDescriptors>                    
             </telerik:ChartSeriesProvider>
         </telerik:RadCartesianChart.SeriesProvider>

VM .. { ..

public ObservableCollection<Item> Data { get; set; }

Data.Add(new WaveFormItem()

{

Name = "105.1",

LineData = new ObservableCollection<LineDataModel>()

{

new WaveFormLineData() { Vector = 0, Value = 1.0 },

new WaveFormLineData() { Vector = 1, Value = 1.1 }

}

});

}

public class LineDataModel

{

public int Vector { get; set; }

public double Value { get; set; }

}

public class Item

{

public string Name { get; set; }

public ObservableCollection<LineDataModel> LineData { get; set; }

}

answered on 10 Mar 2016

6 answers

649 views

Width and Height must be non-negative

I'm working on a chart that had a bunch of series as bars. I'm wanting to change one from a bar to a bubble series and when the chart goes to display I get an error in Telerik code with the exception: "Width and Height must be non-negative".

The stack trace is in the attached PNG file ("Tracker" is my app).

answered on 10 Mar 2016

2 answers

111 views

ItemsSource = DataTable -> SearchPanel System.ArgumentException

Hello,

if i bind a DataTable to a RadGridView.ItemsSource and try to search with SearchPanel, i'm getting a System.ArgumentException error.

Column 'xy' does not belong to table xy.

Can you help me please? Thanks.

<telerik:RadGridView ItemsSource="{Binding Table}" ShowSearchPanel="True"/>

private DataTable _table;

public DataTable Table

{

get { return _table; }

set

{

if (Equals(value, _table)) return;

_table = value;

OnPropertyChanged(nameof(Table));

}

}

public ViewModel()

{

Table = new DataTable("Test");

Table.Columns.Add("Spalte 1");

Table.Columns.Add("Spalte 2");

Table.Columns.Add("Spalte 3");

for (var i = 0; i < 50; i++)

{

var row = Table.NewRow();

row.ItemArray = new object[] { "Cell 1 " + i, "Cell 2 " + i, "Cell 3 " + i };

Table.Rows.Add(row);

}

}

answered on 10 Mar 2016

3 answers

163 views

Navigator update after Remove

I've got a RadCollectionNavigator with Source bound to an ObservableCollection<int> in the VM and CurrentItem two-way bound to an int in the VM. When I call ObservableCollection<int>.Remove I'm expecting the RadCollectionNavigator to update and change CurrentItem, but this isn't happening. Is this something it can do or do I have to implement an update to the CurrentItem binding myself in the VM?

CollectionNavigator

answered on 10 Mar 2016

2 answers

362 views

[Solved] RadCartesianChart not showing annotations in datatemplate

Hi Telerik,

I'm having this strange phenomenon where my RadCartesianChart shows my annotations when I create the control directly on the grid of the usercontrol, but not when I try to access it in a datatemplate. The annotations are added to the chart in code behind. In both cases, the code is executed, but I don't see them when using the datatemplate. The lineseries themselves are shown in both cases.

This is the XAML for the chart in the datatemplate:

<DataTemplate DataType="{x:Type entities:ChartMeasurement}">
<Grid>
<telerik:RadCartesianChart Grid.Row="0" HorizontalAlignment="Stretch" Margin="240,15,0,39" Name="radCartesianChart">
<telerik:RadCartesianChart.Resources>
<DataTemplate x:Key="PointTemplate">
<Ellipse Height="8" Width="8" Stroke="White" StrokeThickness="1" Fill="#1B9DDE" />
</DataTemplate>
<Style x:Key="BorderStyle" TargetType="Border">
<Setter Property="Background" Value="#1B9DDE" />
</Style>
</telerik:RadCartesianChart.Resources>
<telerik:RadCartesianChart.HorizontalAxis>
<telerik:DateTimeContinuousAxis MajorStep="{Binding MyViewModel.MajorStep}"
MajorStepUnit="{Binding MyViewModel.MajorStepUnit}"
PlotMode="OnTicksPadded"
LabelTemplate="{StaticResource HorizontalAxisLabelTemplate}"
LabelRotationAngle="-90"
LabelFitMode="Rotate"
LineThickness="2"
LineStroke="Gray"/>
</telerik:RadCartesianChart.HorizontalAxis>
<telerik:RadCartesianChart.VerticalAxis>
<telerik:LinearAxis Visibility="Hidden"/>
</telerik:RadCartesianChart.VerticalAxis>
<telerik:RadCartesianChart.SeriesProvider>
<telerik:ChartSeriesProvider x:Name="myChartSeriesProvider" Source="{Binding MyViewModel.ChartData.MeasurementList}">
<telerik:ChartSeriesProvider.SeriesDescriptors>
<telerik:CategoricalSeriesDescriptor ItemsSourcePath="RawDataList" ValuePath="Value" CategoryPath="Time_Local">
<telerik:CategoricalSeriesDescriptor.Style>
<Style TargetType="telerik:LineSeries">
<Setter Property="StrokeThickness" Value="2"/>
<Setter Property="Stroke" Value="{Binding GraphColorBrush}"/>
<Setter Property="VerticalAxis" Value="{Binding VerticalAxis}"/>
<Setter Property="LegendSettings" Value="{Binding Measurement.Name, Converter={StaticResource LegendSettings}}"/>
</Style>
</telerik:CategoricalSeriesDescriptor.Style>
</telerik:CategoricalSeriesDescriptor>
</telerik:ChartSeriesProvider.SeriesDescriptors>
</telerik:ChartSeriesProvider>
</telerik:RadCartesianChart.SeriesProvider>
<telerik:RadCartesianChart.Grid>
<telerik:CartesianChartGrid MajorXLinesRenderMode="All" MajorLinesVisibility="XY"/>
</telerik:RadCartesianChart.Grid>
</telerik:RadCartesianChart>
<telerik:RadLegend Items="{Binding LegendItems, ElementName=radCartesianChart}"
FontFamily="Segoe UI"
Grid.Row="0"
Margin="2 52 30 20"/>
</Grid>
</DataTemplate>

As you can see, it is a quite complex graph with a dynamic number of series and 2 vertical axises, where I wan't to combine a number of series on the left vertical axis, and a number of series on the right vertical axis

This is the ChartMeasurement class used in the datatemplate:

public class ChartMeasurement : Measurement
{
private ReportingViewModel _reportingViewModel;

public ChartMeasurement(ReportingViewModel reportingViewModel)
{
_reportingViewModel = reportingViewModel;
MeasurementSignal = new Signal { Name = "Graph" };
}

public ReportingViewModel MyViewModel
{
get { return _reportingViewModel; }
}
}

In code behind, I to the following:

private void RadComboBoxMeasurementPoints_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var reportingView = DataContext as ReportingViewModel;
var measurementPoint = e.AddedItems[0] as MeasurementPoint;

var dataTemplateKey = new DataTemplateKey(typeof(ChartMeasurement));
var dataTemplate = FindResource(dataTemplateKey) as DataTemplate;
if (dataTemplate == null)
{
return;
}
var radCartesianChart = ((Grid)dataTemplate.LoadContent()).Children[0] as RadCartesianChart;
if (reportingView != null &&
measurementPoint != null &&
radCartesianChart != null)
{
radCartesianChart.Annotations.Clear();

var axisLeft = new LinearAxis
{
Title = "",
Minimum = 0,
Maximum = measurementPoint.ScaleLeft,
HorizontalLocation = AxisHorizontalLocation.Left,
TickThickness = 1,
MajorTickLength = 2,
LineThickness = 2,
MajorStep = measurementPoint.ScaleLeft / 10
};

var axisRight = new LinearAxis
{
Title = "",
Minimum = 0,
Maximum = measurementPoint.ScaleRight,
HorizontalLocation = AxisHorizontalLocation.Right,
TickThickness = 1,
MajorTickLength = 2,
LineThickness = 2,
MajorStep = measurementPoint.ScaleRight / 10
};

if (reportingView.ReportData == null)
{
return;
}
var stringLeft = new List<String>();
var stringRight = new List<String>();
foreach (var measurement in reportingView.ReportData.Measurements.Where(m => m.Measurement.MeasurementPoint.Equals(e.AddedItems[0])))
{
if (!measurement.Measurement.HasAxisLeft)
{
measurement.VerticalAxis = axisRight;
stringRight.Add(measurement.Measurement.Name);
if (measurement.Measurement.HasBoundaryValue)
{
radCartesianChart.Annotations.Add(new CartesianGridLineAnnotation
{
Value = measurement.Measurement.BoundaryValue,
Stroke = measurement.GraphColorBrush,
Axis = axisRight,
Label = measurement.Measurement.Name
});
}
}
else
{
measurement.VerticalAxis = axisLeft;
stringLeft.Add(measurement.Measurement.Name);
if (measurement.Measurement.HasBoundaryValue)
{
radCartesianChart.Annotations.Add(new CartesianGridLineAnnotation
{
Value = measurement.Measurement.BoundaryValue,
Stroke = measurement.GraphColorBrush,
Axis = axisLeft,
Label = measurement.Measurement.Name
});
}
}
}
axisRight.Title = String.Join(", ", stringRight);
axisLeft.Title = String.Join(", ", stringLeft);
}
}

This code is executed each time another measurementpoint is selected, but I never see the annotations. The lineseries are shown as expected.

When I omit the datatemplate, and show the chart directly in the grid, it works just fine.

This is the XAML:

<telerik:RadCartesianChart Grid.Row="1" HorizontalAlignment="Stretch" Margin="240,15,0,39" Name="radCartesianChart">
<telerik:RadCartesianChart.Resources>
<DataTemplate x:Key="PointTemplate">
<Ellipse Height="8" Width="8" Stroke="White" StrokeThickness="1" Fill="#1B9DDE" />
</DataTemplate>
<Style x:Key="BorderStyle" TargetType="Border">
<Setter Property="Background" Value="#1B9DDE" />
</Style>
</telerik:RadCartesianChart.Resources>
<telerik:RadCartesianChart.HorizontalAxis>
<telerik:DateTimeContinuousAxis MajorStep="{Binding MajorStep}"
MajorStepUnit="{Binding MajorStepUnit}"
PlotMode="OnTicksPadded"
LabelTemplate="{StaticResource HorizontalAxisLabelTemplate}"
LabelRotationAngle="-90"
LabelFitMode="Rotate"
LineThickness="2"
LineStroke="Gray"/>
</telerik:RadCartesianChart.HorizontalAxis>
<telerik:RadCartesianChart.VerticalAxis>
<telerik:LinearAxis Visibility="Hidden"/>
</telerik:RadCartesianChart.VerticalAxis>
<telerik:RadCartesianChart.SeriesProvider>
<telerik:ChartSeriesProvider Source="{Binding ChartData.MeasurementList, Mode=TwoWay}">
<telerik:ChartSeriesProvider.SeriesDescriptors>
<telerik:CategoricalSeriesDescriptor ItemsSourcePath="RawDataList" ValuePath="Value" CategoryPath="Time_Local">
<telerik:CategoricalSeriesDescriptor.Style>
<Style TargetType="telerik:LineSeries">
<Setter Property="StrokeThickness" Value="2"/>
<Setter Property="Stroke" Value="{Binding GraphColorBrush}"/>
<Setter Property="VerticalAxis" Value="{Binding VerticalAxis}"/>
<Setter Property="LegendSettings" Value="{Binding Measurement.Name, Converter={StaticResource LegendSettings}}"/>
</Style>
</telerik:CategoricalSeriesDescriptor.Style>
</telerik:CategoricalSeriesDescriptor>
</telerik:ChartSeriesProvider.SeriesDescriptors>
</telerik:ChartSeriesProvider>
</telerik:RadCartesianChart.SeriesProvider>
<telerik:RadCartesianChart.Grid>
<telerik:CartesianChartGrid MajorXLinesRenderMode="All" MajorLinesVisibility="XY"/>
</telerik:RadCartesianChart.Grid>
</telerik:RadCartesianChart>
<telerik:RadLegend Items="{Binding LegendItems, ElementName=radCartesianChart}"
Name="radLegend"
FontFamily="Segoe UI"
Grid.Row="1"
Margin="2 52 30 20"/>

And the code behind:

private void RadComboBoxMeasurementPoints_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var reportingView = DataContext as ReportingViewModel;
var measurementPoint = e.AddedItems[0] as MeasurementPoint;

if (reportingView != null &&
measurementPoint != null &&
radCartesianChart != null)
{
radCartesianChart.Annotations.Clear();

var axisLeft = new LinearAxis
{
Title = "",
Minimum = 0,
Maximum = measurementPoint.ScaleLeft,
HorizontalLocation = AxisHorizontalLocation.Left,
TickThickness = 1,
MajorTickLength = 2,
LineThickness = 2,
MajorStep = measurementPoint.ScaleLeft / 10
};

var axisRight = new LinearAxis
{
Title = "",
Minimum = 0,
Maximum = measurementPoint.ScaleRight,
HorizontalLocation = AxisHorizontalLocation.Right,
TickThickness = 1,
MajorTickLength = 2,
LineThickness = 2,
MajorStep = measurementPoint.ScaleRight / 10
};

if (reportingView.ReportData == null)
{
return;
}
var stringLeft = new List<String>();
var stringRight = new List<String>();
foreach (var measurement in reportingView.ReportData.Measurements.Where(m => m.Measurement.MeasurementPoint.Equals(e.AddedItems[0])))
{
if (!measurement.Measurement.HasAxisLeft)
{
measurement.VerticalAxis = axisRight;
stringRight.Add(measurement.Measurement.Name);
if (measurement.Measurement.HasBoundaryValue)
{
radCartesianChart.Annotations.Add(new CartesianGridLineAnnotation
{
Value = measurement.Measurement.BoundaryValue,
Stroke = measurement.GraphColorBrush,
Axis = axisRight,
Label = measurement.Measurement.Name
});
}
}
else
{
measurement.VerticalAxis = axisLeft;
stringLeft.Add(measurement.Measurement.Name);
if (measurement.Measurement.HasBoundaryValue)
{
radCartesianChart.Annotations.Add(new CartesianGridLineAnnotation
{
Value = measurement.Measurement.BoundaryValue,
Stroke = measurement.GraphColorBrush,
Axis = axisLeft,
Label = measurement.Measurement.Name
});
}
}
}
axisRight.Title = String.Join(", ", stringRight);
axisLeft.Title = String.Join(", ", stringLeft);
dataTemplate.LoadContent();
}
}

As you can see, both code snippets are very alike.

What am I missing here or doing wrong?

The reason for using a datatemplate is that I want the chart to show up in a tab page of a dynamic tab control (dynamic number of tab pages).

Thanks in advance.

Hans.

answered on 10 Mar 2016

5 answers

240 views

TableShape

Hi,

I'm trying to create a TableShape project that will visualize tables from our DB, and will enable the users to open tables and create joins between row in a different tables.

I used your demo's code for the TableShape, but instead of --> SamplesFactory (class) --> LoadSample (method) --> diagram.Load(xml) (line 146), I created a TableShape and added it by using : diagram.AddShape(tableShape).

Now I'm trying to add rows to the table, but I can't use the RowShape you have in the demo, I get an exception that the rowShape not suitable for the tableShape.

How can I solve it? How can I add rows to my table?

Best Regards.

answered on 09 Mar 2016

1 answer

271 views

Notify property changed on clear NumericUpDown

Hello,
we are using a NumericUpdown and have set UpdateValueEvent to PropertyChanged and UpdateSourceTrigger to PropertyChanged for the binding.

The property is updated for each change which is the normal behavior.
The property is not updated when the content of the NumericUpDown is selected and deleted by pressing the Delete key.
In this case the property is updated as soon as the control loses focus.

What we expect and need is an immediate update of the property since this should be the behavior according to the property settings.
Any help would be appreciated. We are using version 2015 Q3.

Regards,
Bert

answered on 09 Mar 2016

Top users last month