Questions on UI for WPF Forum

4 answers

169 views

I have the following xaml:

<telerik:RadCarousel Name="myCarousel" HorizontalContentAlignment="Stretch" VerticalAlignment="Top" VerticalContentAlignment="Center" Height="43" Padding="0" IsSynchronizedWithCurrentItem="True" VerticalScrollBarVisibility="Hidden" HorizontalScrollBarVisibility="Hidden" Background="{x:Null}" Margin="25,0,2,0" PreviewMouseDown="effectiveDateCarousel_PreviewMouseDown" PreviewKeyDown="effectiveDateCarousel_PreviewKeyDown" PreviewMouseWheel="effectiveDateCarousel_PreviewMouseWheel">

<telerik:RadCarousel.ItemsPanel>

<ItemsPanelTemplate>

<telerik:RadCarouselPanel HorizontalAlignment="Stretch" VerticalAlignment="Center" Path="{StaticResource path}" IsSelectedTopItem="True" />

</ItemsPanelTemplate

</telerik:RadCarousel.ItemsPanel>

</telerik:RadCarousel>

On the UserControl loaded event I have the following:

RadCarouselPanel panel = myCarousel.FindCarouselPanel();

panel.ItemsPerPage = 7;

Most of the time this works fine. However occasionally the FindCarouselPanel will return null instead of the panel? Am I doing something wrong? Is there anything I can do to prevent this?

Carousel

answered on 05 Jun 2012

7 answers

608 views

ColumnFilterDescriptor changed

since braking changed on for the Q1-2012 version your ColumnFilterDescriptor is not internal and was public.. :(
I use to inherits this class for a special feature for filtering a "flagable enum"

Since it is cannot be inherits anymore, I try ro create my filter again

big lines:
1. standard "disctinct values"
2. an enum that have multiple state are included in filter even if the values is not "EQUALS" but contains...

My problem reside on the "yellow hilighted line."

Braking changes links : http://www.telerik.com/community/forums/wpf/gridview/known-issues-and-breaking-changes---radgridview.aspx
complete doc : Doc

My code: (not original, but cleaned for reading perpose..)

class MaxEnumFlagsDescriptor : FilterDescriptor

{

private FilterDescriptor<MaintenanceBoxDataDataTableRow> Filter;

private string dataMember;

/// <summary>

/// Initializes a new instance of the <see cref="MaxEnumFlagsDescriptor"/> class.

/// </summary>

/// <param name="control">The column.</param>

/// <param name="dataMember">The data member.</param>

/// <param name="enumType">Type of the enum.</param>

public MaxEnumFlagsDescriptor(MaxFilteringControl control, string dataMember, Type enumType)

{

if (dataMember.StartsWith("["))

dataMember = dataMember.RemoveFromStart(1).RemoveFromEnd(1);

this.Control = control;

this.Column = control.GridColumn as GridViewBoundColumnBase;

this.dataMember = dataMember;

this.EnumType = enumType;

Filter = new FilterDescriptor<MaintenanceBoxDataDataTableRow>();

Filter.FilteringExpression = (e) => (Check(e));

}

/// <summary>

/// Creates the filter expression.

/// </summary>

/// <param name="instance">The instance.</param>

/// <returns></returns>

public override System.Linq.Expressions.Expression CreateFilterExpression(System.Linq.Expressions.Expression instance)

{

return Filter.CreateFilterExpression(instance);

}

private bool Check(DataRow row)

{

if (this.DistinctValue == null || !this.Control.IsActive)

return true;

        var desc = this.DistinctValue; // this was available in the ColumnFilterDescriptor. originaly
                                        // in the class (so how to get it..)
                                        // HOW TO GET THE CHECKED VALUES OF THE DISTINCT VALUE LIST

if (!desc.Any())

return true;

Debug.Assert(row != null, "Should have found a Row");

if (row != null)

{

var inf = row[this.dataMember];

if (inf == DBNull.Value)

inf = null;

if (inf == null)

return desc.Any(c => c == null);

else

{

var enumType = this.EnumType;

try

{

var val = Enum.ToObject(enumType, inf).ToString();

return desc.Any(c => IsInclude(c, val, enumType));

}

catch (System.Exception ex)

{

// In case of old value

Debug.Fail(ex.Message);

return false;

}

return true;

}

private static bool IsInclude(object value, string data, Type enumType)

{

var val = Enum.ToObject(enumType, value).ToString();

return data.IndexOf(val) >= 0;

}

GridView

answered on 05 Jun 2012

1 answer

116 views

Error while using RadRichTextBoxribbonUI

Hello Telerik Team,

i tried to use the RadRichTextBoxribbonUI with the RadRichTextBox as it is described here.

http://www.telerik.com/help/wpf/radrichtextbox-features-radrichtextboxribbonui.html#RadRichTextBoxRibbonUI_priorTo_2011.Q3
(Using RadRichTextBoxRibbonUI based on RadRibbonBar using 2011.2.xxx or older)

when i am draging the RadRichTextBoxribbonUI from the Toolbox into the designer area i get the this error.

Die Ressource "images/msoffice/16/linktopreviousheaderfooter.png" kann nicht gefunden werden.
   bei Microsoft.Windows.Design.DocumentModel.ModelProducer.<OnLoad>b__2(Damage damage)
   bei MS.Internal.Design.DocumentModel.DocumentTrees.VirtualModel.VirtualModelDocumentTreeManager.OnEditingScopeComplete(VirtualEditingScope scope)
   bei MS.Internal.Design.DocumentModel.DocumentTrees.VirtualModel.VirtualModelDocumentTreeManager.VirtualEditingScope.OnComplete()
   bei Microsoft.Windows.Design.Model.ModelEditingScope.Complete()
   bei Microsoft.Windows.Design.Interaction.Task.Complete()
   bei MS.Internal.Creation.DragDropCreationTask.OnCreateAt(Object sender, ExecutedToolEventArgs args)

for all who can not read german i will translate the error message.
German: Die Ressource "images/msoffice/16/linktopreviousheaderfooter.png" kann nicht gefunden werden.
=
English: the ressource "images/msoffice/16/linktopreviousheaderfooter.png" can not be found

I hope you can help me

best regards

RichTextBox

answered on 05 Jun 2012

2 answers

128 views

Treeview Drag and drop not working after using latest Dlls

Hi,

I am using telerik treeview control alongwith ,NET System.Windows.Interactivity to implement the drag and drop feature.

Recently i upgraded to version 2012.1.0326.40 and since then the drag and drop feature has stopped working.

Reverting to the older version of 2011.2.0920.40 with same code makes drag and drop works.

Appreciate your help on the same.

General Discussions

answered on 05 Jun 2012

20 answers

1.0K+ views

[Solved] WPF Gridview using Group - performance slow

Hi,

I am in the process of evaluating Telerik Gridview. Our data is organized in groups. I created a RadGridView that uses 1 column as a GroupDescriptor. I noticed that the scrolling through each grouped table is VERY slow as each group is expanded (AutoExpandGroups="True"). The performance is better if I remove GroupDescriptor altogether. Here are what I set in my RadGridView:

<code>CanUserFreezeColumns="False" RowIndicatorVisibility="Collapsed" AutoGenerateColumns="False" IsReadOnly="True" ScrollMode="Deferred" telerik:StyleManager.Theme="Metro" FontSize="11" ShowGroupPanel="False" RowHeight="18" Grid.Row="1" Width="1320" MaxWidth="1320" MinHeight="800" MaxHeight="1000"</code>

Is there anything I can do to increase the performance. The table size is around 14000 cells.

I saw this earlier post and it was stated that the issue was resolved. I can't download the code as I am not yet a licensed user.
http://www.telerik.com/support/pits.aspx#/public/winforms/4570

Please advise. Thanks.

GridView

answered on 05 Jun 2012

8 answers

155 views

[Solved] Validating Data on a Property Level can't catch the error

I have created RadGridview to check the Validating Data on a Property Level. When i run the code and give invalid value, exception is thrown but it wouldn't been caught by the RadGridView. I am Using
WPF 4.0 Version 2010.2 924

Here is the Code

<Window x:Class="WpfApplication1.Window1"

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

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

Title="Window1" Height="300" Width="565" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" Loaded="Window_Loaded">

<Grid>

<telerik:RadGridView Name="radGridView1" AddingNewDataItem="radGridView1_AddingNewDataItem" ShowInsertRow="True">

</telerik:RadGridView>

</Grid>

</Window>

using System;

using System.Windows;

using System.Collections.ObjectModel;

namespace WpfApplication1

{

/// <summary>

/// Interaction logic for Window1.xaml

/// </summary>

public partial class Window1 : Window

{

public Window1()

{

InitializeComponent();

}

public ObservableCollection<Employee> GetEmployees()

{

ObservableCollection<Employee> employees = new ObservableCollection<Employee>();

return employees;

}

private void radGridView1_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)

{

e.NewObject = new Employee();

}

private void Window_Loaded(object sender, RoutedEventArgs e)

{

this.radGridView1.ItemsSource = this.GetEmployees();

}

public class Employee

{

string _FirstName;

public string FirstName

{

get { return _FirstName; }

set

{

if (value.Length > 5)

{

throw new Exception("Firstname must be less than 6");

}

_FirstName = value;

}

check the attachment for error screen shot.

GridView

answered on 05 Jun 2012

3 answers

152 views

[Solved] Word 2007 options like dialog

I there any code snippet (or already existing control) on how to make an option dialog like the one of Microsoft Word 2007.

I would like to use Telerik controls so that I can take advantage of the themes.

I'm using PRISM and my goal is to make a "options service" component in which different modules can push options view.

Regards,

Nicolas

General Discussions

answered on 05 Jun 2012

7 answers

398 views

Table width when exporting with RadDocument

Hi,

I've implemented this helpful example code (http://demos.telerik.com/silverlight/#GridView/PrintAndExportWithRadDocument) and it is all working as expected, however the table that is created does not take up the whole width of the page. I notice it uses the column widths of the RadGridView, however they are not ideal in the A4 pdf. I would like the table that is created for the pdf to size itself based on content. Is this possible, and if so, how would I do it? I figure it's got something to do with this line:

cell.PreferredWidth = new TableWidthUnit((float)columns[i].ActualWidth);

Thanks

GridView

answered on 05 Jun 2012

1 answer

159 views

RadTreeView + QueryableEntityCollectionView + Drag & Drop

I'm working on a project where I have a large amount of data stored in a database organized into a tree. I'm using the EntityFramework, so I'm using the QueryableEntityCollectionView to filter my data and a RadTreeView to display it.

However, I also need support for drag & drop to add/move/delete items. By default, the RadTreeView won't let me drop into this tree as it is. If it was an IList or an ObservableCollection, it will let me, but I need to be able to refresh/filter the visible nodes in the tree.

Is there a way to override the d&d support in RadTreeView to allow drops, and run custom code on drop complete?

I did see this post (http://www.telerik.com/community/forums/silverlight/treeview/use-drag-and-drop-to-rearrange-items-and-then-persist-order-back-to-database.aspx) but it's for silverlight and I don't think the WCF side is needed for a WPF + EF application.

Any advice?
Thanks!

TreeView

answered on 05 Jun 2012

0 answers

145 views

Double-fired OnDrop for listbox inside RadTileView

When the list box lives inside a RadTileView, the OnDrop event will get fired twice with the same parameters.

<telerik:RadTileView>

<telerik:RadTileViewItem>

<Grid x:Name="LayoutRoot" Background="White">

<Grid.Resources>

<Style TargetType="ListViewItem">

<Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="True"></Setter>

</Style>

<DataTemplate x:Key="ApplicationTemplate">

<StackPanel Orientation="Horizontal">

<TextBlock Margin="5" Text="{Binding Name}" VerticalAlignment="Center"></TextBlock>

</StackPanel>

</DataTemplate>

</Grid.Resources>

<Grid.ColumnDefinitions>

<ColumnDefinition></ColumnDefinition>

</Grid.ColumnDefinitions>

<ListView x:Name="ApplicationList" ItemTemplate="{StaticResource ApplicationTemplate}" AllowDrop="True"/>

<ListView x:Name="MyAppList" Background="Gray" Grid.Column="1"

ItemTemplate="{StaticResource ApplicationTemplate}" AllowDrop="True"/>

</Grid>

</telerik:RadTileViewItem>

</telerik:RadTileView>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

ObservableCollection<Item> items = new ObservableCollection<Item>();

for (int i = 1; i <= 10; i++)

items.Add(new Item() { Name = string.Format("item {0}", i) });

ApplicationList.ItemsSource = items;

MyAppList.ItemsSource = new ObservableCollection<Item>();

DragDropManager.AddDragInitializeHandler(ApplicationList, OnDragInitialize);

DragDropManager.AddDragInitializeHandler(MyAppList, OnDragInitialize);

DragDropManager.AddGiveFeedbackHandler(ApplicationList, OnGiveFeedback);

DragDropManager.AddGiveFeedbackHandler(MyAppList, OnGiveFeedback);

DragDropManager.AddDragDropCompletedHandler(ApplicationList, OnDragCompleted);

DragDropManager.AddDragDropCompletedHandler(MyAppList, OnDragCompleted);

DragDropManager.AddDropHandler(ApplicationList, OnDrop);

DragDropManager.AddDropHandler(MyAppList, OnDrop);

}

private void OnDragInitialize(object sender, DragInitializeEventArgs args)

{

args.AllowedEffects = DragDropEffects.Move;

//args.AllowedEffects = DragDropEffects.All;

args.Data = ((FrameworkElement)args.OriginalSource).DataContext;

args.DragVisual = new ContentControl { Content = args.Data, ContentTemplate = LayoutRoot.Resources["ApplicationTemplate"] as DataTemplate };

}

private void OnGiveFeedback(object sender, Telerik.Windows.DragDrop.GiveFeedbackEventArgs args)

{

System.Diagnostics.Trace.WriteLine(string.Format("{0} - OnGiveFeedback sender={1}", DateTime.Now, sender));

args.SetCursor(Cursors.Arrow);

args.Handled = true;

}

private void OnDrop(object sender, Telerik.Windows.DragDrop.DragEventArgs args)

{

System.Diagnostics.Trace.WriteLine(string.Format("{0} - OnDrop sender={1}", DateTime.Now, sender));

((IList)(sender as ListBox).ItemsSource).Add(((DataObject)args.Data).GetData(typeof(Item)));

}

public void OnDragCompleted(object sender, Telerik.Windows.DragDrop.DragDropCompletedEventArgs args)

{

System.Diagnostics.Trace.WriteLine(string.Format("{0} - OnDragCompleted sender={1}", DateTime.Now, sender));

((IList)(sender as ListBox).ItemsSource).Remove(args.Data);

}

public class Item

{

public string Name { get; set; }

}

DragAndDrop

asked on 05 Jun 2012