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3 answers
171 views
Hi,

I've got a little question.

When i've got a lot of rows in my grid and i want to do scrolling using the scrollbar my cpu usage jumps to 80% or more until i stop scrolling!

Same happens with the fade effect when i hover over rows, then my cpu jumps to 60% or more until is stop hovering.

Do you have any explication or solution for this?

Valeri Hristov
Telerik team
 answered on 12 Feb 2009
2 answers
256 views
Hello,

I am having trouble enabling drag/drop functionality in a RadTreeView when I set its ItemsSource to a ListCollectionView. Here is an example:

<Window x:Class="WpfApplication6.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:Telerik="http://schemas.telerik.com/2008/xaml/presentation" 
    SizeToContent="WidthAndHeight" 
    Title="Window1"
    <Telerik:RadTreeView x:Name="sourceTree" Height="300" Width="300" IsDragDropEnabled="True"/> 
</Window> 

    public partial class Window1 : Window 
    { 
        public Window1() 
        { 
            InitializeComponent(); 
 
            ObservableCollection<string> testCollection = new ObservableCollection<string>(); 
            testCollection.Add("one"); 
            testCollection.Add("two"); 
            testCollection.Add("three"); 
 
            ListCollectionView view = new ListCollectionView(testCollection); 
            sourceTree.ItemsSource = view; 
        } 
    } 

The items display fine, but when I drag and drop them nothing seems to happen. If I set the ItemsSource directly to the testCollection, it works just fine, but I need to use a ListCollectionView in my case in order to enable filtering. Is this a bug in the control, or am I doing something improperly? Thanks.

Martin
Top achievements
Rank 1
 answered on 11 Feb 2009
1 answer
154 views
Hello,

I believe I may have discovered a bug with the mousewheel scroll on RadNumericUpDown controls inside of a RadGridView. Here is some example code:

<Window x:Class="RadGridViewBug.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:t="http://schemas.telerik.com/2008/xaml/presentation" 
    Title="Window1" Height="300" Width="300"
  <StackPanel> 
    <t:RadGridView x:Name="grid" Height="300"/> 
  </StackPanel> 
</Window> 

    public partial class Window1 : Window 
    { 
        public Window1() 
        { 
            InitializeComponent(); 
            TestRow[] rows = new TestRow[2]; 
            rows[0] = new TestRow(); 
            rows[1] = new TestRow(); 
            grid.ItemsSource = rows; 
        } 
    } 
 
    class TestRow 
    { 
        public RadNumericUpDown updown1 { getset; } 
        public RadNumericUpDown updown2 { getset; } 
 
        public TestRow() 
        { 
            updown1 = new RadNumericUpDown(); 
            updown2 = new RadNumericUpDown(); 
        } 
    } 

When I run that code, if I press up or down on a couple of the RadNumericUpDown controls and then use the mousewheel to scroll them, the values of them all change instead of just the last one I clicked on. I would expect only the last one I clicked on to change while scrolling the middle mouse wheel. Thanks in advance for your response!


Valeri Hristov
Telerik team
 answered on 11 Feb 2009
2 answers
157 views
Hi,
I get the following exception when I mark IsHierarchyRoot as "False".

   at Telerik.Windows.Controls.GridView.GridViewItemsControl.ExpandToAvailableSpace() in r:\WPF_Scrum\WPF_Team\Sources\Development\WPF\GridView\GridView\GridViewItemsControl.cs:line 1329 
   at Telerik.Windows.Controls.GridView.GridViewItemsControl.GridViewItemsControl_Loaded(Object sender, RoutedEventArgs e) in r:\WPF_Scrum\WPF_Team\Sources\Development\WPF\GridView\GridView\GridViewItemsControl.cs:line 852 
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) 
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) 
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) 
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) 
   at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent) 
   at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root) 
   at MS.Internal.LoadedOrUnloadedOperation.DoWork() 
   at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks() 
   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.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 Imis.Kinetik.TeamPlayer.Client.App.Main() in C:\Projects\TeamPlayerClient\TeamPlayer.Client\obj\Development\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() 

My define the grid like this (Info.Fields is a list):

<Telerik:RadGridView  MinHeight="200"   IsHierarchyRoot="False"  ShowGroupPanel="False" Grid.Row="7" Grid.ColumnSpan="2" Margin="5" AutoGenerateColumns="False" ItemsSource="{Binding Path=Info.Fields, ElementName=workunitNodeUC}" > 
            <Telerik:RadGridView.Columns> 
                <Telerik:GridViewDataColumn AutofitWidth="0" UniqueName="{x:Null}"
                    <Telerik:GridViewDataColumn.CellStyle> 
                        <Style TargetType="{x:Type Telerik:GridViewCell}"
                            <Setter Property="Template"
                                <Setter.Value> 
                                    <ControlTemplate  TargetType="{x:Type Telerik:GridViewCell}"
                                        <CheckBox x:Name="chbChosen" HorizontalAlignment="Center"/> 
                                    </ControlTemplate> 
                                </Setter.Value> 
                            </Setter> 
                        </Style> 
                    </Telerik:GridViewDataColumn.CellStyle> 
                </Telerik:GridViewDataColumn> 
                <Telerik:GridViewDataColumn AutofitWidth="0" HeaderText="Description" UniqueName="Description" DataMemberPath="Name" /> 
                <Telerik:GridViewDataColumn AutofitWidth="0" HeaderText="Comment" UniqueName="Comment" DataMemberPath="InnerValue"  /> 
            </Telerik:RadGridView.Columns> 
        </Telerik:RadGridView> 

Thanks
Tal
Top achievements
Rank 1
 answered on 11 Feb 2009
1 answer
342 views
Hello guys,

I have two questions:
  1. How can I bind a gridview from an Anonymous Type returned LINQ query?
  2. How can I get the key value from a grid bound from an Anonymous Type? On ASP.Net Ajax we use GetDataKeyValue method. Do you have a similar on WPF?

Regards,

Henrique
Hristo Deshev
Telerik team
 answered on 11 Feb 2009
1 answer
108 views
Hi,

I have a very simple project that contains tabs.  And inside one of the tabs is a grid.  If I filter the grid then switch to another tab and then back to the tab with the grid is no longer filtered.  However the filter is still selected.

Thanks

Guido Tapia
Hristo Deshev
Telerik team
 answered on 11 Feb 2009
3 answers
170 views
Hello,
 I want to bind textboxes and comboboxes to the columns of the Grid, In the textbox i want to validate the ip addresses, 
Is it possible to achieve?
A sample code would be helpful.

Thanks in advance 
Hristo Deshev
Telerik team
 answered on 11 Feb 2009
3 answers
502 views
I am trying to implement a simple drag and drop procedure in a RadGridView.  Using the SelectedItem property, I am able to tell which item in the grid I am using when I start dragging, but I also need to know which item they are dropping the item on.  How can I find which item in the list is at a specific position  (e.GetPosition)?

Sterling
Vlad
Telerik team
 answered on 11 Feb 2009
1 answer
127 views

Hello

I want to make carousel items 100% width, but unable to achieve that. Any help would be appreciated.

Here's the code

  <Grid>
<Grid.Resources>
<DataTemplate DataType="{x:Type local:XTraItem}">
<Grid Grid.Column="0" Grid.Row="0" Width="1000">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="900"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>

<Image Source="{Binding Path=ImageURI}" Grid.Column="0" Grid.Row="0" />
<TextBlock Text="{Binding Path=Name}" Foreground="AliceBlue" Grid.Column="1" Grid.Row="0" />
</Grid>
</DataTemplate>
</Grid.Resources>
<telerik:RadCarousel x:Name="XTraCarousel" AutoGenerateDataPresenters="False" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

Milan
Telerik team
 answered on 10 Feb 2009
3 answers
609 views

Hello,


I have the following requirements/queries regarding the grid:

1) How easy is to accommodate other controls (like combobox,textbox,maskedtexbox) in the cell.

2) How easy is to template grid/cell/datarow

3) Binding with observable collection

4) What about validation, do we have any numeric text box, date time picker, ip address text box support.

5) Can we template grouping row.

6) Triggers/Data triggers/Multi triggers support

7) Icon/Card view support

8) Read only level (I.e. it should be at cell, column, row level)

9) Selective sorting support (i.e. can we specify which column to sort and which to not)

10) Does column adjust its width according to data content.

11) Templating datarow/datacell (for ex. Placing image in place of text content) is possible or not.

12) Inplace editing with two way binding.

13) Selective readonly support (i.e. can we specify which column should be readonly and which should not)

14) Can we get cell validation exception so that we can handle it accordingly.

15) In case the validation fails at certain cell does the focus remain on the same cell.

16) Validation exception - can we get them on grid lost focus.

17) Do we have support for events like – grouping, sorting, gridlostfocus, Celllostfocus, rowlostfocus,mouse events at cell/row/grid level etc.

18) Add new row support.

19) Support for deferred/Immediate scrolling.

20) Do we have automatic support for checkbox column (ie. If we bind a column to bool field then automatic checkbox should appear in that column, if not how to place checkbox in a clolumn bound to a bool field)

21) Can we template header row to say have a checkbox in header row to select all checkboxes of all the rows

22) Do we have support for fixed header and footers.

23) Number of themes available.

24) Do we have sample that shows ip address masking in the cell.

25) Context menu on grid rows.

26) Do we have functions to get object/item from the row/container and vice versa

Please suggest me how to achieve above requirements, a sample code will certainly help in meeting this requirements and preparing a demo application.

It will be helpful if you answer the queries with a yes/no.

Thanks in advance

 

 

 

Prash
Top achievements
Rank 1
 answered on 10 Feb 2009
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