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25,555 questions

3 answers

62 views

Acessing TextBox (within GroupFooterTemplate) parent from codebehind

Hello,

I'm using a RadGridView, and in it's footer, a textbox element inside a GroupFooterTemplate. Can I, from codebehind, in a TextBox event (e.g. TextChanged) somehow access the GridView that contains my TextBox? When I check the sender's properties, the parent is null.

Also, can I somehow access the group information and the other groups' TextBoxes?

Any help would be appreciated.

answered on 10 Mar 2016

1 answer

46 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

142 views

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

200 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

106 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

541 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

92 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

137 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

268 views

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

180 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

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