Questions on UI for WPF Forum

5 answers

104 views

Hi,

Can you give me and example of removing nodes from your RadTreeView as the code snippet below generates an error, at line

    
            Parent.Items.Remove(DirectCast(e.Source, TreeViewItem))

    
             Private Sub trvListEvents_Edited(ByVal sender As Object, ByVal e As Telerik.Windows.Controls.RadTreeViewItemEditedEventArgs) Handles trvListEvents.Edited  
        
                    If e.OldText <> e.NewText Then 
        
                        ActionMenuRequest(DirectCast(e.Source, RadTreeViewItem))  
        
                    Else 
        
                        Dim Parent As RadTreeViewItem = Me.CurrentTreeViewItem.Parent  
        
                        Parent.Items.Remove(DirectCast(e.Source, TreeViewItem))  
        
                    End If 
        
                End Sub

Requirements: After Editing a node, if it does not meet a certain criteria, then delete the node.

Note: I am using the RadTreeView with LoadOnDemand

Best

P

TreeView

answered on 27 May 2009

3 answers

71 views

Design time performance is verry poor

Hi,

I'm having a pre purchase test for RadGridView.

I try to develop a small test program with one grid on an xbap application.
Whenever I place a RadGridView control on my page (at design time), my visual studio 2008 start to work verry slow.
Every time I open a new file or trying to view a component properties, well, lets make it short, it happens no metter what i do, the window just gets stuck for 10-30 seconds and the cpu goas up to 100% until the command is performed.

Is there any way to make the conrol work faster at design time?

Thank you.

GridView

answered on 27 May 2009

2 answers

118 views

Unwanted horizontal scrollbar in Caramel theme

I'm using the Caramel theme and somehow, the last column is a little bit over on the right side and thus, making the horizontal scrollbar appears. If I changes the theme to Office_Black, everything is fine. Below is the code used and some screenshot to make it more clear:

                    <telerik:RadGridView Name="radGridView1" telerik:StyleManager.Theme="Caramel"         
                                                 ShowGroupPanel="False" IsFilteringAllowed="True"         
                                                 Foreground="Black" Margin="10,30,10,20" AutoGenerateColumns="False"         
                                                 RowIndicatorVisibility="Collapsed" ColumnsWidthMode="Fill">         
                     
                                <telerik:RadGridView.Columns>         
                                    <telerik:GridViewDataColumn UniqueName="Title" HeaderText="Title" IsFilterable="False" />         
                                    <telerik:GridViewDataColumn UniqueName="Artist" HeaderText="Artist" Width="Auto" />         
                                    <telerik:GridViewDataColumn UniqueName="Key" HeaderText="Key" Width="Auto"/>         
                                </telerik:RadGridView.Columns>         
                            </telerik:RadGridView>         

Caramel theme screenshot: http://www.notesnhac.com/TestFTP/ThemeCaramel.gif

You can see the filter icon got covered up for a small part on the last column (Key).

Office_Black them screenshot: http://www.notesnhac.com/TestFTP/ThemeOfficeBlack.gif

No horizontal scrollbar, and the icon shows up perfectly.

How do I fix this issue with the Caramel theme?

Thank you very much,

Kenny.

GridView

answered on 25 May 2009

1 answer

137 views

GridView Filtering

Hello,

I implemented a control containing a Rad GridView and a text box for instant filtering (similar to your sample examples). I noticed that the custom filtering overrides the filtering set by the drop-down filter (contained on the column headers) menus. From what I understood, the custom filter solution that you provide in the examples alters the GridViewDataControl.FilterDescription property which is used by the drop-down filters on the column headers. Is it possible to have both filters working together? Or is it at least possible to switch back and forth between these two filtering methods?

Thank you.

GridView

answered on 25 May 2009

1 answer

80 views

New Treeviewitem - Fails on BeginEdit

Hi

given the code below is there any reason why my NewNode.Begin edit is causing an exception - object ref not set to an instance of an object. This works fine if I omit the BeginEdit

    
              Dim NewNode As New RadTreeViewItem  
        
                    NewNode.Header = Now  
        
                    Me.CurrentTreeViewItem.IsExpanded = True 
        
                    Me.CurrentTreeViewItem.Items.Add(NewNode)  
        
                    NewNode.IsSelected = True 
        
                    NewNode.BringIntoView()  
        
                    NewNode.BeginEdit()

Thanks

P

TreeView

answered on 25 May 2009

1 answer

101 views

Master Detail Linq to Entities

Hi,

I need to bind a self referencing entityobject to a master detail setup for 3 tiered hierarchy, what is the best way to do this? Curently it seems to be failing to expand the 2nd layer let along the 3rd?

Cheers,
Marcus @ c9

GridView

answered on 25 May 2009

2 answers

212 views

Recover Space

Is there a way to recover the area that was being used by the expander when the expander is collapsed? I have the event captured and I have the contents set to Collapsed but the space is still left on the screen rather than yielding it to the other row in the grid.

    
            <Window x:Class="WpfApplication1.Window1" 
        
                    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls" 
        
                    Title="Test" Height="350" Width="250" Background="Beige">  
        
                <Grid> 
        
                    <Grid.RowDefinitions> 
        
                        <RowDefinition Height="Auto" /> 
        
                        <RowDefinition Height="Auto" /> 
        
                    </Grid.RowDefinitions> 
        
                    <Image Grid.Row="0" 
        
                           Name="imageBackground"    
        
                           HorizontalAlignment="Left" 
        
                           VerticalAlignment="Top" 
        
                           Source="/WpfApplication1;component/Images/master.png"   
        
                           Stretch="Uniform" MaxHeight="250" /> 
        
                    <telerik:RadExpander x:Name="radExpander"   
        
                                         Grid.Row="1" 
        
                                         IsExpanded="True" 
        
                                         telerik:StyleManager.Theme="Vista" 
        
                                         VerticalAlignment="Stretch" HorizontalAlignment="Stretch"   
        
                                         Collapsed="radExpander_Collapsed" Expanded="radExpander_Expanded">  
        
                        <telerik:RadExpander.Header> 
        
                            <TextBlock x:Name="expanderCaption" Foreground="#FFFFFFFF" Text="Test Box" 
        
                                        Visibility="Visible" /> 
        
                        </telerik:RadExpander.Header> 
        
                        <telerik:RadExpander.Content> 
        
                            <WrapPanel x:Name="imageContainer" Orientation="Horizontal">  
        
                                <Image Margin="12" Width="200" Height="64" Stretch="Uniform" Source="/WpfApplication1;component/Images/test.png" /> 
        
                                <Image Margin="12" Width="200" Height="64" Stretch="Uniform" Source="/WpfApplication1;component/Images/test.png" /> 
        
                            </WrapPanel> 
        
                        </telerik:RadExpander.Content> 
        
                    </telerik:RadExpander> 
        
                </Grid> 
        
            </Window>

code:

    
            using System;  
        
            using System.Collections.Generic;  
        
            using System.Linq;  
        
            using System.Text;  
        
            using System.Windows;  
        
            using System.Windows.Controls;  
        
            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;  
        
            namespace WpfApplication1  
        
            {  
        
                /// <summary>  
        
                /// Interaction logic for Window1.xaml  
        
                /// </summary>  
        
                public partial class Window1 : Window  
        
                {  
        
                    public Window1()  
        
                    {  
        
                        InitializeComponent();  
        
                    }  
        
                    private void radExpander_Collapsed(object sender, RoutedEventArgs e)  
        
                    {  
        
                        if (imageContainer != null)  
        
                            imageContainer.Visibility = Visibility.Collapsed;  
        
                    }  
        
                    private void radExpander_Expanded(object sender, RoutedEventArgs e)  
        
                    {  
        
                        if (imageContainer != null)  
        
                            imageContainer.Visibility = Visibility.Visible;  
        
                    }  
        
                }  
        
            }

Expander

answered on 22 May 2009

1 answer

201 views

WPF Controls in Visual Studio 2010?

Hi, my dev team is early adopting the Visual Sudio 2010 and .NET 4.0 now that it is officially in public Beta. I was wondering if it is advisable to manually add the Telerik Q1 2009 WPF controls to the 2010 toolbox? Are there any known incompatabilities? Is there a beta version of the WPF controls that I can use instead?

Thanks,
David Sandor

General Discussions

answered on 22 May 2009

7 answers

154 views

DefaultImageSrc unbound TreeView

Hi I have a unbound treeview. It is populated via Load on demand. I require a style that can set my DefaultImageSrc depending a set of curcumstances, some like

    
            <DataTrigger Binding="{Binding Path=IsFolder}" Value="True">  
        
                                <Setter Property="DefaultImageSrc" Value="../../folder.png" /> 
        
                            </DataTrigger> 
        
                            <DataTrigger Binding="{Binding Path=IsFolder}" Value="False">  
        
                                <Setter  Property="DefaultImageSrc" Value="../../diskdrive.png" /> 
        
                            </DataTrigger>

Can you give me an example

Thanks

P

TreeView

answered on 22 May 2009

2 answers

161 views

Problem in adding a new row

I had a grid view which contains a template column and other columns are autogenerated. I found that "AddingNewDataItem" event is fired when i press insert when the grid view is focused. but it gives me an exception that

Exception has been thrown by the target of an invocation.

System.Reflection.TargetInvocationException was unhandled
Message="Exception has been thrown by the target of an invocation."
Source="mscorlib"
StackTrace:
       at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
       at System.Delegate.DynamicInvokeImpl(Object[] args)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(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, Boolean isSingleParameter)
       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
       at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.Run()
       at System.Windows.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()
       at Cerebrata.CloudStorage.UI.WPF.App.Main() in D:\Projects\CerebrataCloudStorage\UI.WPF\obj\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.NullReferenceException
       Message="Object reference not set to an instance of an object."
       Source="Telerik.Windows.Controls.GridView"
       StackTrace:
            at Telerik.Windows.Controls.GridView.GridViewCell.ShowEditor() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 488
            at Telerik.Windows.Controls.GridView.GridViewCell.<ToggleEditor>b__0() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 593
            at Telerik.Windows.Controls.GridView.GridViewCell.ModifyCellTemplate(Action executeAction) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 461
            at Telerik.Windows.Controls.GridView.GridViewCell.ToggleEditor() in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 593
            at Telerik.Windows.Controls.GridView.EditContext.OnCellEditModeChanged(GridViewCell cell, Boolean newIsInEditMode) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 231
            at Telerik.Windows.Controls.GridView.GridViewCell.IsInEditModeChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 586
            at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
            at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
            at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
            at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)
            at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)
            at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
            at Telerik.Windows.Controls.GridView.GridViewCell.set_IsInEditMode(Boolean value) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Cells\GridViewCell.cs:line 214
            at Telerik.Windows.Controls.GridView.EditContext.SwitchCellToEditMode(GridViewCell cell) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 243
            at Telerik.Windows.Controls.GridView.EditContext.BeginEdit(GridViewCell gridViewCell) in c:\Builds\WPF_Scrum\X1_Q1_2009\Sources\Development\WPF\GridView\GridView\Editing\EditContext.cs:line 259
       InnerException:

GridView

answered on 22 May 2009