Questions on UI for WPF Forum

4 answers

139 views

Do you have an sample for applying a transition when loading a diagram. For example, if I have an existing diagram and want to fade or zoom to a new diagram when I issue the Load() command?

Diagram

answered on 09 May 2012

3 answers

186 views

UpdateLayout when a value (fontsize) changes

Hi,

I'm using a RadTileView and it contains some Textblocks. I have a Combobox above the RadTileView that contains int values for font sizes so that when a combobox selection is made the font size of the Textblocks are updated. When I adjust the window size of the RadTileView (with the mouse) it'll update the views so the new font size fits right. I'd like to update the views whenever the combobox is refreshed so I don't have to resize the window manually to achieve this. Preferably in xaml as the RadTileView is within a DataTemplate and difficult to get to.

If it's any help, the binding the Textblocks use is {Binding Source={StaticResource TVFieldSetsVM}, Path=CommonFontSize}.

Thanks

TileView

answered on 09 May 2012

2 answers

67 views

How do I move the "Add New Record" and form to the bottom

I want to move the "add new Record button" to the bottom becase
a) it's more intutive that way and
b) it sometimes dosn't update and then the new record still appears to be the first record instead of the last which is what it really is.

There is a soltion that changes the control template using something called "<VisualStateManager.VisualStateGroups>" which I can't use because I'm still using visual studio 3.5 not 4.0. I am by no means an expert with wpf yet so I don't even know how to do a control template. Can someone point me in the right direction.

GridView

answered on 09 May 2012

2 answers

86 views

Hide ScatterChart vertical line at zero

I can't figure out how to get rid of the vertical line on the X Axis at zero on my scatter chart. I have some scatter charts that it appears in and others that it does not, but I am unable to find an axis property that control this. Does anyone know how to control this?

Thanks!

Chart

answered on 09 May 2012

2 answers

133 views

Style of selected items in chart

Hi Telerik Team,

the telerik example Programatically selecting visual items with the new interactivity api in radchart
helped me a lot, because i needed exactly this behaviour, but i have a problem to style the points.

I tried this (with different colors to see what is applied)

telerik:SeriesAppearanceSettings x:Key="BenchmarkAppearance"

Stroke="Wheat"

StrokeThickness="2"

Fill="DarkBlue">

<telerik:SeriesAppearanceSettings.PointMark>

<telerik:PointMarkAppearanceSettings Shape="Circle" Stroke="White" StrokeThickness="1"

Fill="Gray"/>

</telerik:SeriesAppearanceSettings.PointMark>

</telerik:SeriesAppearanceSettings>

and this

<Style x:Key="BenchmarkPointStyle" TargetType="telerik:PointMark">

<Setter Property="Shape"

Value="Circle" />

<Setter Property="Stroke"

Value="White" />

<Setter Property="StrokeThickness"

Value="1" />

<Setter Property="Fill"

Value="Yellow" />

</Style>

and this one from the help file RadControls Wpf

LineSeriesDefinition l = new LineSeriesDefinition();

l.Appearance.PointMark.Stroke = new SolidColorBrush( Colors.Blue );

l.Appearance.PointMark.StrokeThickness = 1;

l.Appearance.PointMark.Fill = new SolidColorBrush( Colors.Transparent );

l.Appearance.PointMark.Shape = MarkerShape.Diamond;

this.radChart.DefaultSeriesDefinition = l;

but none of them worked really out.
The first example works until the selected points are deselected. After deselection the style is the default
style and not my applied one. (My next attempt is to set the style again, after the points are deselected.)

Do you have any idea?

kind regards
Hubert

Chart

answered on 09 May 2012

1 answer

80 views

Gridview title in export file

hi,

How can i write report title which is exported from Gridview in excel format?

Thanks in advance...

Regards,
Yasser

GridView

answered on 09 May 2012

3 answers

102 views

Gap between content image & its text in html

Gap between content image & its text is not correctly shown in html...

RichTextBox

answered on 09 May 2012

9 answers

566 views

GridView CellTemplate Binding Errors

Hello Telerik,

This is probably a silly question with an obvious answer - but I am having issues with my CellTemplate content binding...

<telerik:RadGridView x:Name="GridViewDetailAC"

AutoGenerateColumns="False"

AlternateRowBackground="White"

AlternationCount="2"

AllowDrop="True"

CanUserSelect="True"

CanUserDeleteRows="False"

CanUserInsertRows="False"

CanUserResizeColumns="True"

EditTriggers="None"

Grid.Row="1"

Grid.Column="0"

Grid.ColumnSpan="4"

HorizontalGridLinesBrush="SlateGray"

ItemsSource="{Binding XXXX}"

RowIndicatorVisibility="Collapsed"

RowHeight="26"

SelectedItem="{Binding Path=SelectedXXXX,

NotifyOnSourceUpdated=True,

UpdateSourceTrigger=PropertyChanged}"

SelectionMode="Single"

SelectionUnit="FullRow"

ShowColumnFooters="False"

ShowGroupPanel="False"

ShowColumnHeaders="True"

VerticalGridLinesBrush="Transparent">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Vendor"

Width="Auto"

TextAlignment="Left"

IsVisible="{Binding ElementName=ckbVendorVisi,

Path=IsChecked,

FallbackValue=0}">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<DockPanel>

<Label Content="{Binding Path=LV_Name, FallbackValue=''}"

Visibility="{Binding Path=NotNewRecord,

FallbackValue=0,

Converter={StaticResource BoolVisiRevConv2}}"/>

<TextBox Text="{Binding Path=LV_Name, FallbackValue=''}"

Visibility="{Binding Path=NotNewRecord,

FallbackValue=0,

Converter={StaticResource BoolVisiConv2}}"/>

</DockPanel>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

The above piece of code, using MVVM, produces a 'System.Windows.Data Information XX' errors - Three to be exact: 41, 20, 21 for each ViewModel property binding.

System.Windows.Data Information: 41 : BindingExpression path error: 'LV_Name' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=LV_Name; DataItem=null; target element is 'Label' (Name=''); target property is 'Content' (type 'Object')

System.Windows.Data Information: 41 : BindingExpression path error: 'NotNewRecord' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'Label' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 41 : BindingExpression path error: 'LV_Name' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=LV_Name; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Text' (type 'String')

System.Windows.Data Information: 41 : BindingExpression path error: 'NotNewRecord' property not found for 'object' because data item is null.  This could happen because the data provider has not produced any data yet. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 20 : BindingExpression cannot retrieve value due to missing information. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

System.Windows.Data Information: 21 : BindingExpression cannot retrieve value from null data item. This could happen when binding is detached or when binding to a Nullable type that has no value. BindingExpression:Path=NotNewRecord; DataItem=null; target element is 'TextBox' (Name=''); target property is 'Visibility' (type 'Visibility')

If I swap the CellTemplate out and use the DataMemberBidning property on the GridViewDataColumn then no binding error(s) occur - BUT I require the dual content hide/show feature.

I have also attempted to use the other types of GridViewColumn available but that seemed to make little difference in the outcome.

Can you help me determin why my non-null ItemsSource and its non-null properties are not being friendly with your RadGridView's columns?

Cheers,

GridView

answered on 09 May 2012

5 answers

155 views

Move Current To an item which is not on page collection

Hi,
Another question,
we are working with wcf data services and the dataservicedatasource (the mvvm way - QueryableDataServiceCollectionView) with the datapager.
On certain scenarios, after adding a new item for example, we would like to set the current item in the datagrid to an item
which may or may not be on the presented page in the pager.
the MoveCurrentTo() method does not work if it is not on the collection of the page retrieved.

Is there an easy way to do so?
Thanks

DataServiceDataSource

answered on 09 May 2012

4 answers

127 views

Error translating the query

Hi
In our application which is based on wcf data services and Entity Framework, we are using the dataservicedatasource in the mvvm pattern(with the QueryableDataServiceCollectionView object) togeher with the RadDataFilter.
the filter works great in all scenarios but when trying to retrieve data based on the "equal filter" of the property which is the primary key of the table we get this exception:
"Error translating Linq expression to URI: Cannot specify query options (orderby, where, take, skip) on single resource" (which is also the query on the loadingeventargs of the LoadingData event of the QueryableDataServiceCollectionView).
i.e. only when fetching a single data.
the Query.expression which is generated is:
Convert([10000].Where(item => (item.Company_No == 54)).Take(14)).IncludeTotalCount()

Thanks

DataServiceDataSource

answered on 09 May 2012