Questions on UI for WPF Forum

6 answers

334 views

RadCartesianChart with ScatterPointSeries slow

I have a RadCartesianChart with one ScatterPointSeries when the number of points is 20000 the time to plot is 40 seconds.

The class where stored values:

public class ChartDataFlatness

{

public double XValue { get; set; }

public double YValue { get; set; }

public Brush Brush { get; set; }

}

The class used to pass value to RadCartesianChart

class ViewModelFlatness : ViewModelBase

{

private List<ChartDataFlatness> data;

public ViewModelFlatness() { }

public List<ChartDataFlatness> Data {

get { return this.data; }

set {

if (this.data != value) {

this.data = value;

this.OnPropertyChanged("Data");

}

The user control used for show the data:

<UserControl x:Class="TiQ.Qua.Tna.Quality.Station.UserControls.UserControlChartFlatnessQualityStation"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:classes="clr-namespace:TiQ.Qua.Tna.Quality.Station.Classes"

mc:Ignorable="d" RenderTransformOrigin="0,0" HorizontalAlignment="Left" VerticalAlignment="Top">

<Grid>

<telerik:RadCartesianChart x:Name="RadChartFlatness" LayoutUpdated="RadChartFlatness_LayoutUpdated" >

<telerik:ScatterPointSeries XValueBinding="XValue" YValueBinding="YValue" >

<telerik:ScatterPointSeries.PointTemplate>

<DataTemplate>

<Rectangle Width="10" Height="10" Fill="{Binding DataItem.Brush}"/>

</DataTemplate>

</telerik:ScatterPointSeries.PointTemplate>

</telerik:ScatterPointSeries>

<telerik:RadCartesianChart.HorizontalAxis><telerik:LinearAxis VerticalLocation="Top" /></telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis><telerik:LinearAxis IsInverse="True" /></telerik:RadCartesianChart.VerticalAxis>

</telerik:RadCartesianChart>

</Grid>

</UserControl>

The code used to set data for RadGraph:

ViewModelFlatness _viewModel = new ViewModelFlatness { };

// Set Data of _viewModel

RadChartFlatness.Series[0].ItemsSource = _viewModel.Data;

It is possibile to reduce the time to plot data to 2/5 seconds.

Greetings,

Paolo

Chart

answered on 02 Sep 2016

6 answers

420 views

Issues with group descriptors collection in RadGridView and QueryableCollectionView

The issues we can reproduce with the latest version 2016.2.822.40

Issues #1 and #2.
How to reproduce on the test project:
Run the application.
Click the «Create new QCV with group descriptor» button.

See pic. 1

We see two issues:
1. Groups inside the table are doubled. Group descriptors collection contains two group descriptors (of the same type: GroupDescriptor), but only one is shown in «Grouped by» section.
2. Grid itself does not notify when its GroupDescriptors collection has been changed, though QueryableCollectionView bound to this Grid notifies of its GroupDescriptors collection successfully.

Issue #3
How to reproduce on the test project:
Start the application.
Delete the «Profession» group descriptor (click on X in «Groupped by»).
Group by the «Profession» group manually (drag-and-drop column header onto «Grouped by»).
Click the «Create new QCV with group descriptor» button.

See pic. 2.

We see now, that group descriptors were doubled. In the GroupDescriptors collection of Grid there are two descriptors of two different types: ColumnGroupDescriptor and GroupDescriptor. And it seems impossible to programmatically add a descriptor of type «ColumnGroupDescriptor» in the viewmodel, because it should know about the UI (it needs column data), and hence is against the principles of MVVM.

Furthermore, if you now click the «Create new QCV with group descriptor» button again, you will see that groups are tripled:

See pic. 3

GridView

answered on 02 Sep 2016

1 answer

93 views

Event to intimate number of pages increase.

Hi,

I have a radGridView and a RadDataPager. The source of RadDataPager.Source is bound to RadGridView.items. Adding items in grid automatically increases number of pages.

Is there any event available that can intimate me if number of pages are increased in data pager? Actually I want to call dataPager.MoveToLastPage(); if items are added in grid.

Thanks in Advance.

DataPager

answered on 01 Sep 2016

5 answers

104 views

Numbers in Indian Culture

Hi Team !!

I want to know what my DataFormatString should be if i want to display numbers in the Indian Culture :

100

1,000

10,000

1,00,000

10,00,000

1,23,45,678

GridView

answered on 01 Sep 2016

2 answers

1.7K+ views

Checkbox isChecked binding

Hi, I have a RadGridView with a column having a checkbox inside that I should use to activate or deactivate the user. I retrieve the rows of my radgridview from a query in sqlserver. The problem is with the checkbox column: I can't get the checkbox checked based on the value in my sql column (bit). This is how I retrive the rows:

Dim dt As New DataTable

Using sqlCon = New SqlConnection(ConnectionStringRemote)

sqlCon.Open()

Dim cmd = New SqlCommand("", sqlCon)

cmd.CommandText = "SELECT        MA_Carriers.Carrier, MA_Carriers.CompanyName, ISNULL(STRT_CarriersManager.Activated,0) AS Attivo

FROM STRT_CarriersManager RIGHT OUTER JOIN

MA_Carriers ON STRT_CarriersManager.Carrier = MA_Carriers.Carrier WHERE MA_Carriers.Disabled=0"

Dim sda = New SqlDataAdapter(cmd)

sda.Fill(dt)

gridCarriers.ItemsSource = dt

End Using

And this is the XAML:

<UserControl x:Class="CarriersManager"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:local="clr-namespace:Dalessio_Logistics"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:sys="clr-namespace:System;assembly=mscorlib"

mc:Ignorable="d"

d:DesignHeight="500" d:DesignWidth="1100" Background="White">

<UserControl.Resources>

<local:BoolConverter x:Key="BoolConverter" />

</UserControl.Resources>

<StackPanel Margin="0,0,0,0" Height="auto" HorizontalAlignment="Stretch">

<StackPanel x:Name="panelTitle" Height="50" VerticalAlignment="Top" DockPanel.Dock="Top" Orientation="Horizontal" HorizontalAlignment="Stretch">

<telerik:Label Content="Gestione operatori:"/>

</StackPanel>

<StackPanel x:Name="spContent">

<telerik:RadGridView x:Name="gridCarriers" AutoGenerateColumns="False" CanUserInsertRows="False" CanUserDeleteRows="False" RowIndicatorVisibility="Collapsed"

ShowGroupPanel="False" IsReadOnly="False" Height="{Binding ActualHeight, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" SelectionMode="Extended" SelectionUnit="FullRow"

CanUserReorderColumns="False" FontFamily="Source Sans Pro Semibold" FontSize="14" GridLinesVisibility="Horizontal" IsFilteringAllowed="True" ShowSearchPanel="True" RowHeight="45">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn x:Name="Carrier" UniqueName="Carrier" Header="Carrier" IsReadOnly="True" Width="150" DataMemberBinding="{Binding Carrier}"/>

<telerik:GridViewDataColumn x:Name="CompanyName" Header="CompanyName" IsReadOnly="True" DataMemberBinding="{Binding CompanyName}" Width="*"/>

<telerik:GridViewColumn Header="Attivo">

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<CheckBox IsChecked="{Binding Path=Attivo, Converter={StaticResource BoolConverter}}" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked"/>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</StackPanel>

</UserControl>

And this is the BoolConverter : IValueConverter

Public Class BoolConverter

Implements IValueConverter

#Region "IValueConverter Members"

Public Function Convert(value As Object, targetType As Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.Convert

If targetType <> GetType(Boolean) Then

Throw New InvalidOperationException("The target must be a boolean")

End If

Return CBool(value)

End Function

Public Function ConvertBack(value As Object, targetType As Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.ConvertBack

Throw New NotSupportedException()

End Function

#End Region

End Class

It doesn't work, my CheckBoxes are always unchecked. Can sameone help me please?

Thank you

General Discussions

answered on 01 Sep 2016

2 answers

145 views

Binding problems

Hi, I have a problem with my gridview, I don't know why Binding works in some columns but not in other. This is my xaml:

<UserControl x:Class="CarriersManager"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:local="clr-namespace:Dalessio_Logistics"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:sys="clr-namespace:System;assembly=mscorlib"

mc:Ignorable="d"

d:DesignHeight="500" d:DesignWidth="1100" Background="White">

<StackPanel Margin="0,0,0,0" Height="auto" HorizontalAlignment="Stretch">

<StackPanel x:Name="panelTitle" Height="50" VerticalAlignment="Top" DockPanel.Dock="Top" Orientation="Horizontal" HorizontalAlignment="Stretch">

<telerik:Label Content="Gestione operatori:"/>

</StackPanel>

<StackPanel x:Name="spContent">

<telerik:RadGridView x:Name="gridCarriers" AutoGenerateColumns="False" CanUserInsertRows="False" CanUserDeleteRows="False" RowIndicatorVisibility="Collapsed" IsFilteringAllowed="True"

ShowGroupPanel="False" IsReadOnly="False" Height="{Binding ActualHeight, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" SelectionMode="Single"

CanUserReorderColumns="False" FontFamily="Source Sans Pro Semibold" FontSize="14" GridLinesVisibility="Horizontal" RowHeight="45">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn x:Name="Carrier" UniqueName="Carrier" Header="Carrier" IsReadOnly="True" Width="150" DataMemberBinding="{Binding Carrier}"/>

<telerik:GridViewDataColumn x:Name="CompanyName" Header="CompanyName" IsReadOnly="True" DataMemberBinding="{Binding CompanyName}" Width="*"/>

<telerik:GridViewCheckBoxColumn Header="Attivo" Width="100" DataMemberBinding="{Binding Attivo}" IsReadOnly="True"/>

<telerik:GridViewColumn Header="Attiva" Width="80">

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<telerik:RadButton x:Name="btPiù" CommandParameter="{Binding Carrier}" Content="+" Click="btPiù_Click" TouchDown="btPiù_Click" Background="#FF97DA7E" />

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewColumn>

<telerik:GridViewColumn Header="Disattiva" Width="80">

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<telerik:RadButton x:Name="btMeno" CommandParameter="{Binding Carrier}" Content="{Binding Carrier}" Click="btMeno_Click" TouchDown="btMeno_Click" Background="#FFEC6F6F"/>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</StackPanel>

</UserControl>

this is my vb:

Private Sub UserControl_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded

Dim dt As New DataTable

Using sqlCon = New SqlConnection(ConnectionStringRemote)

sqlCon.Open()

Dim cmd = New SqlCommand("", sqlCon)

cmd.CommandText = "SELECT MA_Carriers.Carrier, MA_Carriers.CompanyName, ISNULL(STRT_CarriersManager.Activated,0) AS Attivo

FROM STRT_CarriersManager RIGHT OUTER JOIN

MA_Carriers ON STRT_CarriersManager.Carrier = MA_Carriers.Carrier WHERE MA_Carriers.Disabled=0"

Dim sda = New SqlDataAdapter(cmd)

sda.Fill(dt)

gridCarriers.ItemsSource = dt

End Using

End Sub

And this is the result:

http://prntscr.com/cbrdtd

As you can see the content of the green button is empy, and also the commandparameter is empty when I try to retrieve it. Can you help me please?

Thank you

GridView

answered on 01 Sep 2016

1 answer

102 views

Help with Checkbox

I have the following checkbox:

<telerik:GridViewDataColumn>

<telerik:GridViewDataColumn.CellTemplate>
<DataTemplate>
<CheckBox x:Name="chck_tipoR" IsChecked="{Binding Liquidar, Mode=TwoWay}" Click="chck_tipoR_Click"/>
</DataTemplate>
</telerik:GridViewDataColumn.CellTemplate>
</telerik:GridViewDataColumn>

the "Liquidar" variable is my base data type bool that makes the checkbox to appear selected or not, I want to make the checkbox that will click and not checked activate depending on a condition, the condition is that by giving click the checkbox a login screen where the user and password introduce me appears and when it has been satisfying my checkbox is activated.

I'm ultizando the click event for this action but in the method click the checbox in code behind not like having only the checkbox that I clicked activated, not as referrers the checkbox that I clicked and this is activated .

Please can support me with this

here is my metod:

private void chck_tipoR_Click(object sender, RoutedEventArgs e)
{

DialogoConfirmacionCobrar midialog = new DialogoConfirmacionCobrar();
midialog.ShowDialog();

}

GridView

answered on 01 Sep 2016

1 answer

2.6K+ views

SelectedValue and SelectedItem

I have a Telerik RadCombobox where I need to react to the change of selected item and store the selected value.

telerik:RadComboBox ItemsSource="{Binding CurrencyList}" DisplayMemberPath="Currency" SelectedValuePath="CurrencyID" SelectedValue="{Binding SelectedIssuance.IssuanceCurrencyID, Mode=TwoWay}" IsSynchronizedWithCurrentItem="True" SelectedItem="{Binding SelectedCurrency,Mode=OneWayToSource}"

This works the first time I access the view, however subsequent accesses on the same or another record the displayed value is always the first record in the CurrencyList

Any suggestions on how to fix this issue?

One idea is to get the changed value in the VM from the Model by subscribing to the OPC event and remove the SelectedItem binding.

ComboBox

answered on 01 Sep 2016

1 answer

147 views

Horizontal Slide

Hello,

is it possible to do just a horizontal slide (no zoom) of some Images like on this homepage

http://www.volkswagen-motorsport.com/index.php?id=321

Best,

Steffen

TransitionControl

answered on 01 Sep 2016

1 answer

114 views

RadGridView and VirtualQueryableCollectionView Filters are not working

I am binding my RadGridView to a VirtualQueryableCollectionView, everything is working fine except the filters. What could be the reason that the filters are not working ?

Where should I look for the Error ?

GridView

answered on 31 Aug 2016