Questions on UI for WPF Forum

5 answers

204 views

I'm a bid fed up with WPF databounding and is trying out the non-databound road :)

Probably me thats doing something wrong, But I get this error:
"Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead."

I modified your FirstLook example by adding this method to the codebehind:

    
                    private void LB() 
        
                    { 
        
                        System.Data.DataTable dv = ExamplesDB.GetCustomers(); 
        
                        foreach (System.Data.DataRow dr in dv.Rows) 
        
                        { 
        
                            radGridViewFirstLook.Items.Add(dr); 
        
                        } 
        
                    }

And removing the DataContext and ItemSource setters in the XAML file:

    
            <QuickStart:ExampleControl x:Class="Telerik.Windows.Examples.GridView.FirstLook.Example" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:QuickStart="clr-namespace:Telerik.Windows.QuickStart;assembly=Telerik.Windows.QuickStart" 
        
                xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                xmlns:e="clr-namespace:Telerik.Windows.Examples"> 
        
                <Grid> 
        
                    <telerik:RadGridView Name="radGridViewFirstLook" ColumnsWidthMode="Fill" AutoGenerateColumns="False" Margin="0,0,-1,0"> 
        
                        <telerik:RadGridView.Columns> 
        
                            <telerik:GridViewDataColumn Width="100" IsReadOnly="False" DataType="{x:Null}"  HeaderText="Customer ID" UniqueName="CustomerID" /> 
        
                            <telerik:GridViewDataColumn Width="100" DataType="{x:Null}" HeaderText="Company Name" UniqueName="CompanyName" /> 
        
                            <telerik:GridViewDataColumn Width="100" DataType="{x:Null}" HeaderText="Country" UniqueName="Country" /> 
        
                            <telerik:GridViewDataColumn Width="100" IsReadOnly="False" DataType="{x:Null}" HeaderText="City"  UniqueName="City" /> 
        
                            <telerik:GridViewDataColumn Width="100" DataType="{x:Null}" HeaderText="Contact Name"  UniqueName="ContactName" /> 
        
                            <telerik:GridViewDataColumn Width="100" DataType="{x:Null}" HeaderText="Bool" UniqueName="Bool" /> 
        
                        </telerik:RadGridView.Columns> 
        
                    </telerik:RadGridView> 
        
                    <telerik:RadPanelBar Height="6" Margin="232,0,284,-330" Name="radPanelBar1" VerticalAlignment="Bottom" /> 
        
                </Grid> 
        
            </QuickStart:ExampleControl>

Why isn't this working - I'm not using ItemsSource?

GridView

answered on 05 Apr 2010

1 answer

136 views

Copying individual or multiple cells from the DataGrid

I want to do the following using the DataGrid view

1. Copy individual or multiple cells from the Grid, and paste to a text file
-- When I try to do this, I am copying the whole row. I just want to copy one cell, or multiple cell. I want functionality similar to Excel
2. Copy contents of one or more cells and copy to a different section of the Grid
-- I am not sure if the current control supports it or not. When I tried to do this on a sample Grid, it didn't work

GridView

answered on 05 Apr 2010

1 answer

85 views

Styling Selected Row Transition

Hello,

What is the quickest way to remove/style the transition animation that occurs when shifting focus from one row to the next. It appears that there is an animation fading out the selected row colour, and we'd like to remove that.

Thanks

GridView

answered on 05 Apr 2010

1 answer

382 views

Set ToolTip in CheckBox

I would like to know if it is possible to set programmatically a tooltip in the GridViewSelectColumn´s checkcoxes.

GridView

answered on 05 Apr 2010

4 answers

182 views

ContextMenu.ItemClick event and Tag issue

Hello,

I'm programmably creating menu items within the context menu. I assign one a Tag property, but the MenuItem in the event argument that comes back in the ItemClick event has a null Tag, so I'm not sure why that is the case? The tag is set in the collection of items in the menu....

Thanks.

ContextMenu

answered on 03 Apr 2010

1 answer

195 views

DbIsNullExpression

Hello,
     I am trying to work with the RadGridView and implement the external filter example in your How To section. I have been getting this error that I cannot seem to figure out. It happens when I type in the search to box and it occurs with a column header click event. At first I thought it had to do with saving and loading the state of the grid, but now I am not so sure. The error is being thrown in the CustomFilterDescription Class on the property FilterValue() and on the line:
Me.OnPropertyChanged("FilterValue")

Here is the error I am getting with the search for. (any suggestions would be appreciated)

System.ArgumentException was unhandled by user code
Message=The argument to DbIsNullExpression must refer to a primitive or reference type.
Source=System.Data.Entity
StackTrace:
       at System.Data.Common.CommandTrees.ExpressionBuilder.Internal.ArgumentValidation.ValidateIsNull(DbExpression argument, Boolean allowRowType)
       at System.Data.Objects.ELinq.ExpressionConverter.EqualsTranslator.CreateIsNullExpression(ExpressionConverter parent, Expression input)
       at System.Data.Objects.ELinq.ExpressionConverter.EqualsTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.NotTranslator.TypedTranslate(ExpressionConverter parent, UnaryExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.NotEqualsTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.ConditionalTranslator.TypedTranslate(ExpressionConverter parent, ConditionalExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.BinaryTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateIntoCanonicalFunction(String functionName, Expression Expression, Expression[] linqArguments)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.CanonicalFunctionDefaultTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateFunctionIntoLike(MethodCallExpression call, Boolean insertPercentAtStart, Boolean insertPercentAtEnd, Func`5 defaultTranslator)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.StringContainsTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.EqualsTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input, DbExpressionBinding& binding)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SequenceMethodTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, SequenceMethod sequenceMethod)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SequenceMethodTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, SequenceMethod sequenceMethod)
       at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)
       at System.Data.Objects.ELinq.ExpressionConverter.Convert()
       at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption)
       at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
       at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
       at System.Data.Objects.ObjectQuery`1.GetEnumeratorInternal()
       at System.Data.Objects.ObjectQuery.System.Collections.IEnumerable.GetEnumerator()
       at Telerik.Windows.Data.QueryableCollectionView.PopulateInternalList(IQueryable view)
       at Telerik.Windows.Data.QueryableCollectionView.CreateInternalList()
       at Telerik.Windows.Data.QueryableCollectionView.EnsureInternalList()
       at Telerik.Windows.Data.QueryableCollectionView.get_InternalList()
       at Telerik.Windows.Data.QueryableCollectionView.get_IsEmpty()
       at Telerik.Windows.Controls.GridView.BaseItemsControl.OnItemCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
       at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.DataItemCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.DataItemCollection.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
       at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
       at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
       at Telerik.Windows.Data.QueryableCollectionView.RefreshAndRaiseCollectionChanged(NotifyCollectionChangedEventArgs args)
       at Telerik.Windows.Data.QueryableCollectionView.Refresh()
       at Telerik.Windows.Data.QueryableCollectionView.RefreshOrDefer()
       at Telerik.Windows.Data.QueryableCollectionView.OnFilterDescriptorsItemChanged(Object sender, ItemChangedEventArgs`1 e)
       at Telerik.Windows.Data.ObservableItemCollection`1.OnItemChanged(ItemChangedEventArgs`1 e)
       at Telerik.Windows.Data.ObservableItemCollection`1.OnItemPropertyChanged(Object sender, PropertyChangedEventArgs e)
       at System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
       at Telerik.Windows.Data.FilterDescriptorBase.OnPropertyChanged(PropertyChangedEventArgs args)
       at Telerik.Windows.Data.FilterDescriptorBase.OnPropertyChanged(String propertyName)
       at FRPilot.Core.CustomFilterDescriptor.set_FilterValue(String value) in C:\Development\FRPilot\Core\FRPilot.Core\CustomFilterDescriptor.vb:line 25
       at FRPilot.View.GroupView.SearchForTextBox_TextChanged(Object sender, TextChangedEventArgs e) in C:\Development\FRPilot\Presentation\FRPilot.View\Views\GroupView.xaml.vb:line 104
       at System.Windows.Controls.TextChangedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       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.Controls.Primitives.TextBoxBase.OnTextChanged(TextChangedEventArgs e)
       at System.Windows.Controls.Primitives.TextBoxBase.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
       at System.Windows.Controls.TextBox.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
       at System.Windows.Documents.TextContainerChangedEventHandler.Invoke(Object sender, TextContainerChangedEventArgs e)
       at System.Windows.Documents.TextContainer.EndChange(Boolean skipEvents)
       at System.Windows.Documents.TextContainer.System.Windows.Documents.ITextContainer.EndChange(Boolean skipEvents)
       at System.Windows.Documents.TextRangeBase.EndChange(ITextRange thisRange, Boolean disableScroll, Boolean skipEvents)
       at System.Windows.Documents.TextRange.System.Windows.Documents.ITextRange.EndChange(Boolean disableScroll, Boolean skipEvents)
       at System.Windows.Documents.TextRange.ChangeBlock.System.IDisposable.Dispose()
       at System.Windows.Documents.TextEditorTyping.DoTextInput(TextEditor This, String textData, Boolean isInsertKeyToggled, Boolean acceptControlCharacters)
       at System.Windows.Documents.TextEditorTyping.TextInputItem.Do()
       at System.Windows.Documents.TextEditorTyping.ScheduleInput(TextEditor This, InputItem item)
       at System.Windows.Documents.TextEditorTyping.OnTextInput(Object sender, TextCompositionEventArgs e)
       at System.Windows.Controls.Primitives.TextBoxBase.OnTextInput(TextCompositionEventArgs e)
       at System.Windows.UIElement.OnTextInputThunk(Object sender, TextCompositionEventArgs e)
       at System.Windows.Input.TextCompositionEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       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.RaiseTrustedEvent(RoutedEventArgs args)
       at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
       at System.Windows.Input.InputManager.ProcessStagingArea()
       at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
       at System.Windows.Input.TextCompositionManager.UnsafeCompleteComposition(TextComposition composition)
       at System.Windows.Input.TextCompositionManager.PostProcessInput(Object sender, ProcessInputEventArgs e)
       at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs)
       at System.Windows.Input.InputManager.ProcessStagingArea()
       at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
       at System.Windows.Input.TextCompositionManager.UnsafeStartComposition(TextComposition composition)
       at System.Windows.Input.TextCompositionManager.PostProcessInput(Object sender, ProcessInputEventArgs e)
       at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs)
       at System.Windows.Input.InputManager.ProcessStagingArea()
       at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
       at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
       at System.Windows.Interop.HwndKeyboardInputProvider.ProcessTextInputAction(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
       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)
InnerException:

GridView

answered on 02 Apr 2010

1 answer

109 views

horizontal scroll does not move

Hi Team,

I have the problem about horizontal scrolling.

In the following case, a horizontal scroll does not move.

AutoGenerateColumns = False

(when binding data to a column manually)

EnableColumnVirtualization = True

column width is specified on the Code.

Version: Telerik RadControls for WPF 2010 Q1 Trial

Is there any method of avoiding this problem?

Please help me.

Regards,

athasian.

GridView

answered on 02 Apr 2010

1 answer

94 views

A more specific BringItemIntoView()?

Just wondering if there was something like BringItemIntoView(), but that could bring the item exactly to a desired position?

Something like

                    radTreeView.BringItemIntoView(radTreeView.SelectedItem, new Point(0, 100));         

Let me know.

Thanks!

TreeView

answered on 02 Apr 2010

5 answers

290 views

Coloring the Legend Items

I followed the instructions in another forum post for changing the colors of my pie chart and that worked fine, but the legend colors continued to show the original theme colours.

My XAML inside the grid resources (I only set the first two colors).

    
                        <SolidColorBrush x:Key="RadialItemStroke" Color="#FF000000"/>  
        
                        <telerikStyling:StylesPalette x:Key="{telerikStyling:ThemeResourceKey   
        
                                ThemeType={x:Type telerikStyling:Office_BlackTheme},   
        
                                ElementType={x:Type telerikStyling:ChartArea},   
        
                                ResourceId={x:Static telerikStyling:ResourceHelper.ResourceKeyRadialStyle}}"> 
        
                            <Style TargetType="{x:Type Shape}">  
        
                                <Setter Property="Stroke" Value="{StaticResource RadialItemStroke}" /> 
        
                                <Setter Property="StrokeThickness" Value="2" /> 
        
                                <Setter Property="Fill" Value="{StaticResource WidgetLightGreen}" /> 
        
                            </Style> 
        
                            <Style TargetType="{x:Type Shape}">  
        
                                <Setter Property="Stroke" Value="{StaticResource RadialItemStroke}" /> 
        
                                <Setter Property="StrokeThickness" Value="2" /> 
        
                                <Setter Property="Fill" Value="{StaticResource WidgetOrange}" /> 
        
                            </Style> 
        
                        </telerikStyling:StylesPalette>

My chart.

    
                        <telerik:RadChart x:Name="ProgressChart"   
        
                                          Margin="4,8,4,4" 
        
                                          VerticalAlignment="Stretch"   
        
                                          HorizontalAlignment="Stretch">  
        
                            <telerik:RadChart.Background> 
        
                                <SolidColorBrush Color="Transparent"/>  
        
                            </telerik:RadChart.Background> 
        
                        </telerik:RadChart>

Nothing fancy, but the legend doesn't color correctly. I saw another post that mentionned the data series naming & legend items naming have been decoupled in the latest release - so I am assuming that also the colors were seperated as well, but I can't figure out how to change them.

Greg

Chart

answered on 02 Apr 2010

2 answers

230 views

RadTreeView.Scroll doesn't fire with mouse wheel

I have this event handler:

                             
                     
                    private void theTree_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)         
                    {         
                        // do something         
                    }         

And it fires all right when I move the scroll bar by dragging it, but when I move around with the mouse wheel, it doesn't fire. Any workaround for this?

Thanks!

TreeView

answered on 01 Apr 2010