Questions on UI for WPF Forum

8 answers

291 views

Performance issue when scrolling, expanding

I have 10+ columns in my radtreelistview control

when i scroll or expand, the responding time of the control is quite slow

for example, while expanding a node, even it only has like 1 or 2 child rows, it still take a long time to load

i have tried to 'hide' most of the columns, then the responding time becomes instant

is treelistview not designed for such purpose

or is there anyway to work around this???

TreeListView

answered on 20 Jul 2011

13 answers

353 views

ComboBoxcolumn Filter

Hello

I have Combo Box column in grid with data member binding for id.

The problem that the Filter shows the Ids instead of the names

How can I show the name without change the data member binding or the filter?

See picture attached.

Best regards

Ehud.

GridView

answered on 20 Jul 2011

3 answers

211 views

Moving grid rows up/down without rebinding

Hi,

I need to have the ability to move the rows of a radgridview up/down without rebinding the grid. The gridview is grouped on two groups.

Is there a quick and simple way to do that?

Thanks,
Arpit

GridView

answered on 20 Jul 2011

2 answers

53 views

FieldFilter bug in Q2 2011?

Hello, we just updated our DLL's to Q2 2011 (CLR 4.0), and we noticed that the field filter drop lists are not allowing independent values. For example, if you select "Contains" for Filter1, then Filter2 also becomes "Contains". Likewise, if you select "Starts With" for Filter2, and Filter1 already is set to "Contains", Filter1 changes to "Starts With".

We are not overriding any functionality with Prepare, etc.

Thanks for any info.

GridView

answered on 19 Jul 2011

0 answers

181 views

Realtime Scrolling and Virtialization on Columns/Rows makes the scrolling jumping and bumping

I tried your latest demo 2010.2

The GridView has 8 Rows. Each Row has a RichTextBox as DataTypeColumn.

On the GridView the Virtualization on Columns + Rows is turned on also the Realtime scrolling.

When I drag now the thumb bar of the Scrollbar the DataRows are jumping with a delay. Seems the creating of a datarow when it is getting into the visible area is badly solved.

What is wrong with my code and how can I improve smoothness of the scrolling ?

Using the so called crap DataGrid from Microsoft the scrolling is superb and the DataGrid is loaded 3 times faster... I just miss the features you offer...

my test code:

<telerik:RadGridView x:Name="dailyGrid"  ItemsSource="{Binding PeriodListViewModel}" ScrollMode="RealTime" AutoGenerateColumns="False" CanUserDeleteRows="False" CanUserInsertRows="False" CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserSortColumns="False" DataLoadMode="Asynchronous" RowStyle="{StaticResource ResourceKey=RowStyle}" <br

>                RowIndicatorVisibility="Collapsed" EnableRowVirtualization="False" EnableColumnVirtualization="False"><

br> <telerik:RadGridView.Columns> <telerik:GridViewDataColumn Header="Content" Width="*"> <telerik:GridViewDataColumn.CellTemplate> <DataTemplate> <Grid HorizontalAlignment="Stretch"> <Grid.RowDefinitions> <RowDefinition Height="200" /> </Grid.RowDefinitions> <telerik:RadRichTextBox VerticalScrollBarVisibility="Auto" VerticalAlignment="Stretch" VerticalContentAlignment="Stretch"

<br>                                                            IsSpellCheckingEnabled="False" <

br> x:Name="RTFBox" /> <telerikProvider:RtfDataProvider  Rtf="{Binding Path=Content}" UpdateSourceTrigger="LostFocus" RichTextBox="{Binding ElementName=RTFBox}" /> </Grid> </DataTemplate> </telerik:GridViewDataColumn.CellTemplate> </telerik:GridViewDataColumn> </telerik:RadGridView.Columns> </telerik:RadGridView>-->

btw. the DataLoadMode Async or Sync there seems no difference for me. The data is always loaded syncronously because the GridView is only visible when all data is loaded... thats not async!

GridView

asked on 19 Jul 2011

5 answers

461 views

how to find the control in GridView's DataColumn CellTemplate

Hello,

I want get the the Label in gridview's datacolumn celltemplate.
In xaml file , the design is as follows.

<telerik:RadGridView x:Name="ecbPropertiesGV" AutoGenerateColumns="False"
 ActionOnLostFocus="CancelEdit" CanUserReorderColumns="False"
 RowIndicatorVisibility="Collapsed" IsFilteringAllowed="False"
 CanUserDeleteRows="False" CanUserInsertRows="False" CanUserSelect="False"
 CanUserSortColumns="False" IsReadOnly="True" ShowGroupPanel="False" CanUserResizeColumns="False">
 <telerik:RadGridView.Columns>
 <telerik:GridViewDataColumn Header="Number." x:Name="numberColumn" HeaderTextAlignment="Center">
 <telerik:GridViewDataColumn.CellTemplate>
 <DataTemplate>
 <Label x:Name="lblName" Width="170" VerticalAlignment="Center" />
 </DataTemplate>
 </telerik:GridViewDataColumn.CellTemplate>
 </telerik:GridViewDataColumn>
</telerik:RadGridView>

How to find the lblName(Label) in GridViewDataColumn.
If anyone who knows about this , please reply me.

Best Regards

GridView

answered on 19 Jul 2011

8 answers

209 views

RadGridView headers styles

Hi,

How can I define Headers style in RadGridView in code

Or

Is there any property which deals with headers styles?

Thanks,
-Narendra

GridView

answered on 19 Jul 2011

2 answers

154 views

[Solved] Issue with RadTabControl and Test manager 2010

My application is having an error when I try to write a manual test with the TestManager.

When running the application, the error is not generated only when recording tests.

The stacktrace of the error is this:
System.NullReferenceException: Object reference not set to an instance of an object. at Telerik.Windows.Controls.RadTabControlAutomationPeer.GetChildrenCore() in f:\113\WPF_Scrum\Current_HotFix\Sources\Development\Controls\Navigation\TabControl\RadTabControlAutomationPeer.cs:line 207 at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren() at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit) at System.Windows.Automation.Peers.ItemsControlAutomationPeer.UpdateChildren() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree() at System.Windows.Automation.Peers.AutomationPeer.FireAutomationEvents() at System.Windows.ContextLayoutManager.fireAutomationEvents() at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg) at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork() at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget) at System.Windows.Interop.HwndTarget.OnResize() at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam) at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

TabControl

answered on 19 Jul 2011

2 answers

160 views

Trouble with a drag and drop TreeView and Gridview

Good morning,

I would like to use a TreeView that's can drag and drop in a GridView

I make the TreeView but when a want to drag and drop i have a probleme the null Exception, after 4 days i can't see the problem.

Let me show you my code to help me please.

I have a class library LabelData to make the database and a data class

this is my table

CREATE TABLE MyTable

(IdTable Int(2),

IdLabel Int(20),

LName char(50)

)

and my Rows

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (1, 200, 'firstName');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (2, 200, 'lastName');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (3, 200, 'middleName');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (4, 201, 'circuit');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (5, 201, 'series');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (6, 202, 'country');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (7, 202, 'region');

INSERT INTO MyTable (IdTable,IdLabel,LName) VALUES (8, 202, 'zipcode');

For make the treeview, I use IdLabel to make like "categorie" and i use LName to make like "product" .

I add a heritance in on my table MyTable GroupLabel with the property LName

This is my class data.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

LNamespace LabelData

{

public class DataProvider

{

LabelDataContext dc;

public DataProvider()

{

dc = new LabelDataContext();

}

public IEnumerable<Label> GetLabel()

{

return from e in dc.MyTable

group e by e.IdLabel into gr

select new Label() { IdLabel = gr.Key, LName= gr };

}

public IEnumerable<MyTable> Get_Table()

{

return from p in dc.MyTable

select p;

}

public class Label

{

public int IdLabel { get; set; }

public IEnumerable<MyTable> LName{ get; set; }

}

And this is my behind code xaml.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Telerik.Windows.Controls.GridView;

using Telerik.Windows.Controls.DragDrop;

using Telerik.Windows.Controls;

using System.Collections.ObjectModel;

using LabelData;

using Telerik.Windows.Controls.TreeView;

using System.Collections;

using System.Net;

using System.Windows.Media.Animation;

using Telerik.Windows;

LNamespace LabelMunich

{

/// <summary>

/// Logique d'interaction pour MainWindow.xaml

/// </summary>

public partial class WindowTreeView : Window

{

public WindowTreeView()

{

InitializeComponent();

ProfilData.DataProvider dataProvider = new ProfilData.DataProvider();

treeView1.ItemsSource = dataProvider.GetModule();

radGridView.ItemsSource = dataProvider.Get_Table();

RadDragAndDropManager.AddDropQueryHandler(radGridView, new EventHandler<DragDropQueryEventArgs>(this.RadGridView_OnDropQuery));

RadDragAndDropManager.AddDropInfoHandler(radGridView, new EventHandler<DragDropEventArgs>(this.RadGridView_OnDropInfo));

}

private void RadRibbonButton_Click(object sender, RoutedEventArgs e)

{

// FAjout fa = new FAjout();

formAjout fa = new formAjout();

fa.Show();

// this.ShowActivated();

}

private void radTreeView_PreviewDragEnded(object sender, RadTreeViewDragEndedEventArgs e)

{

e.Handled = true;

}

private void RadGridView_OnDropQuery(object sender, DragDropQueryEventArgs e)

{

e.QueryResult = (e.Options.Source as RadTreeViewItem).Item is Module;

}

private void RadGridView_OnDropInfo(object sender, DragDropEventArgs e)

{

if (e.Options.Status == DragStatus.DropComplete)

{

(radGridView.ItemsSource as IList<Module>).Add((e.Options.Payload as Collection<Object>)[0] as Module);

}

And my Xaml document

<Window x:Class="ProfilTandem.WindowTreeView"

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

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

xmlns:northwind="clr-namespace:ProfilData;assembly=LabelData"

xmlns:local="clr-namespace:LabelMunich"

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

xmlns:telerikDragDrop="clr-namespace:Telerik.Windows.Controls.DragDrop;assembly=Telerik.Windows.Controls"

Title="MainWindow" Height="450" Width="585">

<Window.Resources>

<DataTemplate x:Key="Team">

<TextBlock Text="{Binding Path=LName}"/>

</DataTemplate>

<HierarchicalDataTemplate DataType="{x:Type northwind:Label}" ItemsSource="{Binding Path=LName}">

<Border Width="250">

<Grid>

<TextBlock

Text="{Binding Path=IdLabel}" FontSize="14" FontWeight="Bold" Margin="2" >

</TextBlock>

</Grid>

</Border>

</HierarchicalDataTemplate>

<HierarchicalDataTemplate DataType="{x:Type northwind:GroupLabel}">

<Grid Margin="6">

<TextBlock Text="{Binding Path=LName}" Padding="2" />

</Grid>

</HierarchicalDataTemplate>

</Window.Resources>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*" />

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="Auto" />

</Grid.RowDefinitions>

<telerik:RadTreeView IsDragDropEnabled="True" Grid.Column="0" Grid.Row="1"

SelectionMode="Multiple" IsEditable="True" x:Name="treeView1" Margin="0,20,0,245"

PreviewDragEnded="radTreeView_PreviewDragEnded"

IsDragTooltipEnabled="False" ItemsSource="{Binding}"/>

<StackPanel Grid.Column="1" Grid.Row="1">

<telerik:RadGridView x:Name="radGridView" AutoGenerateColumns="False"

Width="400" Height="400" HorizontalAlignment="Left" telerikDragDrop:RadDragAndDropManager.AllowDrop="True"

DataContext="{Binding}" ItemsSource="{Binding}">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Path=IdLabel}"/>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Path=LName}"/>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</StackPanel>

</Grid>

</Window>

This is all

When i try to drag items treeview to gridview i have exception on this line

(radGridView.ItemsSource as IList<Label>).Add((e.Options.Payload as Collection<Object>)[0] as Label);

The exception System.NullReferenceException was unhandled

Object reference not set to an instance of an object

Thank you for your help

DragAndDrop

answered on 19 Jul 2011

1 answer

88 views

Child grids/DataForm syncronization

Hello,
I'm trying to bind a hierarchical RadGridView to the same DataForm on a window (n levels of children, determined at runtime).
For the first level i do:

_qcv = new QueryableCollectionView(_entities.Countries.ToList());
radGridView1.ItemsSource = _qcv;
radDataForm1.ItemsSource = _qcv;

Everything works fine, the grid is well syncronized with the dataform.
How can i get acces to the new expanded child grids to do the same? I mean bind the itemsCollections behind those grids to the dataForm and keep them in sync? What events should i use and how should i get the child Collections?
What is the correct aproach for this kind of children/parent/dataform sync?

Thank you.

GridView

answered on 19 Jul 2011