Questions on UI for WPF Forum

1 answer

213 views

Binding UriImageProvider to something in memory

Hello,

I have another UriImageProvider question. I have a series of images that my user can select from (via a drop down). When they select the image they want, I need my RadMap's UriImageProvider to grab the currently selected image information and display the image. Preferably, I would use the Byte Array that I have in memory to build the image on the fly and pass it to the provider. Worse case, I can write it to disk but I would rather avoid this. I can't seem to see a way to do this with Uri="{Binding...}". Any examples out there on how to dynamically change the Uri of the UriImageProvider?

Cheers,
Seth

Map

answered on 06 Dec 2011

3 answers

225 views

[Solved] NullReferenceException on GridViewDataColumn with nullable DateTime

Good afternoon.

I have some XAML that worked fine with release 2011.1.502.35, but I want to upgrade to the latest version (2011.3.11.16.0).

Unfortunately, I have a number of GridViews with GridViewDataColumn fields bound to nullable DateTime fields like this -

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Precedence}" Header="Precedence" IsReadOnly="True" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Description" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding OffenceFromDate}" Header="From Date"/>

<telerik:GridViewDataColumn DataMemberBinding="{Binding OffenceToDate}" Header="To Date"/>

<telerik:GridViewComboBoxColumn ItemsSource="{Binding RelativeSource={RelativeSource AncestorType=Page}, Path=DataContext.Queues}"

SelectedValueMemberPath="OID"

DataMemberBinding="{Binding AllocationQueue}"

DisplayMemberPath="Name"

Header="Assign To Queue"

IsComboBoxEditable="True" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

When I load up a grid containing a row that contains a null value in either OffenceFromDate or OffenceToDate, I'm now getting the following exception -

Telerik.Windows.Controls.GridView.GridViewDataControl.MeasureOverride(System.Windows.Size)

System.NullReferenceException occurred
Message=Object reference not set to an instance of an object.
Source=Telerik.Windows.Data
StackTrace:
at Telerik.Windows.Data.Expressions.UnboxT`1.NullableField[TElem](Object value) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Core\Data\Expressions\MemberAccess\Unbox.cs:line 39
InnerException:

Is there any way around this? As I mentioned earlier, the older release was fine with these records.

Thanks for your time.

Paul

GridView

answered on 06 Dec 2011

1 answer

201 views

AddingNewDataItem Not Firing

When the ItemsSource (ObservableCollection) is empty (Count = 0) calling BeginInsert does cause the AddingNewDataItem event to fire. This works fine when ItemsSource has at least 1 item.

GridView

answered on 06 Dec 2011

1 answer

129 views

Binding FilterDescriptor IsActive

Is there a way in XAML to bind a property of a filterdescriptor for when it's active or not. I'd like to define a filterdescriptor in XAML and bind whether or not it's active (i.e. applied to the gridview) to a MVVM property.

GridView

answered on 06 Dec 2011

2 answers

377 views

Index was out of range. Must be non-negative and less than the size of the collection.

Hi,

Using the GridView definition below I get a Index out of bounds exception. This was working in 2011 Q2 but when I upgraded to Q3 I get this when I launch the application.
Any help would be much appreciated.

Thank you,

Vlad

The GridView:

<Telerik:RadGridView
                    AutoGenerateColumns="False"
                    Name="ItemGrid"
                    Telerik:StyleManager.Theme="{Binding Path=SelectedThemeName}" SelectionMode="Extended">
                    <Telerik:RadGridView.ItemsSource>
                        <Binding Path="CurrentDataSourceViewModelBindingList" Mode="TwoWay"/>
                    </Telerik:RadGridView.ItemsSource>
                    <Telerik:RadGridView.Columns>



                        <Telerik:GridViewDataColumn
                            Header="Source"
                            DataMemberBinding="{Binding DataSourcePath}"
                            Width="*">
                            <Telerik:GridViewDataColumn.CellEditTemplate>
                                <DataTemplate>
                                    <TextBox Text="{Binding Path=DataSourcePath, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                                </DataTemplate>
                            </Telerik:GridViewDataColumn.CellEditTemplate>
                        </Telerik:GridViewDataColumn>

                        <Telerik:GridViewDataColumn
                            Header="Custodian"
                            DataMemberBinding="{Binding Custodian}"
                            Width="*">
                            <Telerik:GridViewDataColumn.CellEditTemplate>
                                <DataTemplate>
                                    <TextBox Text="{Binding Path=Custodian, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                                </DataTemplate>
                            </Telerik:GridViewDataColumn.CellEditTemplate>
                        </Telerik:GridViewDataColumn>
                    </Telerik:RadGridView.Columns>
                </Telerik:RadGridView>

The Error:

System.ArgumentOutOfRangeException was unhandled by user code
Message=Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Source=mscorlib
ParamName=index
StackTrace:
       at System.ThrowHelper.ThrowArgumentOutOfRangeException()
       at System.Collections.Generic.List`1.get_Item(Int32 index)
       at Telerik.Windows.Controls.GridViewColumnCollectionInternal.ColumnFromDisplayIndex(Int32 displayIndex) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Columns\GridViewColumnCollectionInternal.cs:line 420
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.InitializeMeasureData() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 355
       at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size availableSize) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Virtualization\GridViewCellsPanel.cs:line 301
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
       at System.Windows.Controls.ItemsPresenter.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at Telerik.Windows.Controls.GridView.GridViewRowItem.MeasureOverride(Size constraint) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Rows\GridViewRowItem.cs:line 214
       at Telerik.Windows.Controls.GridView.GridViewHeaderRow.MeasureOverride(Size availableSize) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\Rows\GridViewHeaderRow.cs:line 189
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
       at Telerik.Windows.Controls.GridView.GridViewScrollViewer.MeasureOverride(Size constraint) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\ScrollViewer\GridViewScrollViewer.cs:line 179
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
       at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Border.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Documents.AdornerDecorator.MeasureOverride(Size constraint)
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.Controls.Control.MeasureOverride(Size constraint)
       at Telerik.Windows.Controls.GridView.GridViewDataControl.MeasureOverride(Size constraint) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 6969
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       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)
InnerException:

GridView

answered on 05 Dec 2011

3 answers

173 views

Partially Bound RadTreeView

I'm attempting (with limited success) to create a TreeView that contains a mixture of dynamic and static data.

You'll find my current best attempt at this below, however since I'm nesting TreeViews there is a side effect wherein it is possible to have multiple items within the parent TreeView selected. When I've tried nesting TreeViewItems the results were not positive, i.e. only the parent level TreeViewItem in the ItemTemplate is displayed and space for it's children is created but nothing is output.

I would really like to know how to acheive my goal without resorting to specifying the entire menu in collections which I bind to the TreeView.

Thank you

<telerik:RadTreeView Width="225" HorizontalAlignment="Left" Background="Transparent" FontWeight="SemiBold">

<telerik:RadTreeViewItem Header="Customer" Command="{Binding OpenCustomerCommand}"/>

<telerik:RadTreeViewItem Header="Sites" Command="{Binding OpenSiteBrowserCommand}" ItemsSource="{Binding Sites}">

<telerik:RadTreeViewItem.ItemTemplate>

<DataTemplate>

<telerik:RadTreeView>

<telerik:RadTreeViewItem Header="{Binding Key}"