Questions on UI for WPF Forum

3 answers

157 views

Strange error when using PercentComboBox

Hello Telerik Team,

I am facing some issue when trying to load a page with a PDF, just like we find on your updated SDK Samples Browser (PdfViewer -> Change Scale Factor)

basically I just added the required assemblies we see here http://docs.telerik.com/devtools/wpf/controls/radpdfviewer/getting-started , and copied and pasted the code from that sample

The sample runs fine. Even with my PDF on it.

But I am having the error you can see in the attached picture when I place it on my solution.

Is there anything I am missing?

Thank you

PDFViewer

answered on 26 Aug 2016

3 answers

320 views

error in aplying aggregate function when binding from datatable

I am getting error while supplying aggregate function and then setting itemssource property of chart to datatable...

my code is like below..

   Dim sm As New SeriesMapping
        sm.SeriesDefinition = New LineSeriesDefinition
        sm.ItemMappings.Add(New ItemMapping("VDate", DataPointMember.XCategory))
        sm.ItemMappings.Add(New ItemMapping("Sales", DataPointMember.YValue, ChartAggregateFunction.Sum))
        rd.SeriesMappings.Add(sm)

rd.ItemsSource = DataSetMain.Tables(3)

Error i get...
"No generic method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic."

Does that mean i cant use datatable which includes aggregate function or...if possible then then how?

Chart

answered on 26 Aug 2016

2 answers

97 views

Create RadMaskedNumericInput dynamically

Hi,

I need to create a set of RadMaskedNumericInput dynamically in code. I have the following (working) code with WPF TextBox

            var textBox = new TextBox
            {
                Height = 23,
                Width = 40,
                Margin = new Thickness(recalculatedPoint.X, recalculatedPoint.Y, 0, 0),
                VerticalAlignment = VerticalAlignment.Top,
                HorizontalAlignment = HorizontalAlignment.Left
            };

            Binding bind = new Binding(bindingExpression)
            {
                Source = this,
                Mode = BindingMode.TwoWay,
                UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
            };
            textBox.SetBinding(TextBox.TextProperty, bind);

When I change the control type from TextBox to RadMaskedNumericInput and binding property from TextBox.TextProperty to RadMaskedNumericInput.ValueProperty control is created but binding does not work.The code is:

            var textBox = new RadMaskedNumericInput
            {
                Height = 23,
                Width = 40,
                Margin = new Thickness(recalculatedPoint.X, recalculatedPoint.Y, 0, 0),
                VerticalAlignment = VerticalAlignment.Top,
                HorizontalAlignment = HorizontalAlignment.Left
            };

            Binding bind = new Binding(bindingExpression)
            {
                Source = this,
                Mode = BindingMode.TwoWay,
                UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
            };
            textBox.SetBinding(RadMaskedNumericInput.ValueProperty, bind);

Has anyone an idea why binding does not work?

Thanks in advance.

Have a nice day

MaskedInput (Numeric, DateTime, Text, Currency)

answered on 26 Aug 2016

3 answers

823 views

Show validation error message on focus

Is there a way to make the validation error message for input controls in general (WatermarkedTextBox, NumericUpDown, MaskedInputs etc) appear on focus of the field? By default it appears on hovering over the small triangle in the upper-right corner of the control, when it's in the error state. This however is pretty hard for users to figure out and also sometimes to correctly "hit" with the mouse cursor.

Thanks!

General Discussions

answered on 26 Aug 2016

1 answer

226 views

Content alignment in DataFormDataField

I'm trying to get the label to align left, and the text box to align left, in their respective columns. Can't make it happen. Both the label and the textbox seem to move to the same column, and have a mind of their own.

Here's the set-up:

So, based on an example I saw the grid should have three columns, and I tried to set the label to be in column 1, and the text box in column 2, and I need both to align to the left within their columns.

Hints ?

DataForm

answered on 25 Aug 2016

11 answers

262 views

evaluating diagram

hi all, i've a graph editor using other graph component (graph#), now i'm evaluating to replace it with telerik diagram...

the actual component layout the graph with some predefined alghoritm and there's no way to store the changes the user made on the layout. the user can move a node but i cant get the new position when i save the diagram and store the changes...

So the most important requirment is to get and set for each node the location (x,y).

i need to link two nodes with two types of arrow, can telerik set a color for arrow depending on view model?

can i add a context menu to each node?

can i style the node using datatemplate?

add a pic to see the actual

thanks!

Diagram

answered on 25 Aug 2016

1 answer

152 views

[Solved] Rad grid unique row validation

Hi Everyone,

I have a unique required. I want show error when two rows are same. In attached image table all rows are valid rows except last and first rows. I want show error at first and last row. Can please help me here.

Note: There is no unique Column values.

Regards,

Rajendar.

GridView

answered on 25 Aug 2016

1 answer

68 views

Appoinments not displayed while not in ObservableCollection UI for Silverlight Resources Buy Try

Hi,

I'm binding a custom ObservableCollection to the AppointmentsSource of radScheduleView. This doesn't specialize ObservableCollection but still implements INotifyPropertyChanged, INotifyCollectionChanged and ICollection.

The fact is : DisplayedElements are not refreshed when I add an element (either with UI or code) and I need to refresh the ScheduleView (for example : changing ViewDefinition) for them to appear. A bigger problem is in inlining editing since CreateInlineAppointment does Remove immediately after CreateNew (because the new element isn't in the displayed element).

Then I wonder what is the "ObservableCollection" expected behaviour for the DisplayedElements to be refreshed ?
Same question may apply to "Appointment" (ours is implementing IAppointment, INotifyPropertyChanged).

Thanks for your help.

ScheduleView

answered on 25 Aug 2016

2 answers

469 views

Cannot set foreground using item container style selector?

I am trying to set the Foreground color of selected RadTreeViewItem but it cannot be set, though, other elements like Background is working.

<UserControl>

<UserControl.Resources>

<DataTemplate x:Key="AdvancedVariableTemplate">

<RadioButton Checked=

"itemCont

<ResourceDictionary>
 
<!-- ItemContainerStyleSelector -->
<Style x:Key="AdvancedVariableItemContainerStyle" TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">
        <Setter Property="Background" Value="Red"/>
        <Setter Property="Foreground" Value="Green"/>
</Style>
</ResourceDictionary>


class AdvVariableContainerStyleSelector : StyleSelector
    {
        private Style darkThemeStyle;
        private Style lightThemeStyle;
 
        public override Style SelectStyle(object item, DependencyObject container)
        {
            Configuration config = UserConfigurations.getConfig();
            if (config.AppSettings.Settings["CurrentTheme"] != null)
            {
                switch (config.AppSettings.Settings["CurrentTheme"].Value.ToString().ToUpper())
                {
                    case "LIGHT":
                        return lightThemeStyle;
                    case "STANDARD":
                        return lightThemeStyle;
                    case "DARK":
                        return darkThemeStyle;
                    default:
                        return null;
                }
            }
            else
                return null;
        }
 
        public Style DarkThemeStyle
        {
            get
            {
                return this.darkThemeStyle;
            }
            set
            {
                this.darkThemeStyle = value;
            }
        }
 
        public Style LightThemeStyle
        {
            get
            {
                return this.lightThemeStyle;
            }
            set
            {
                this.lightThemeStyle = value;
            }
        }
    }

ainerRadio_Checked"

Content="{Binding CustomName}" ToolTip="{Binding TooltipString}"/>

</DataTemplate>

<HierarchicalDataTemplate x:Key="AdvancedGroupSeriesRadioTemplate" ItemsSource="{Binding LstAppDataSeries}">

<TextBlock Text="{Binding CustomName}" FontWeight="Bold" />

</HierarchicalDataTemplate>

<HierarchicalDataTemplate x:Key="AdvancedGroupSideTemplate" ItemsSource="{Binding LstAppDataSeriesSides}">

<TextBlock Text="{Binding CustomName}" FontWeight="Bold"/>

</HierarchicalDataTemplate>

<VariablesGroup:VariablesHierarchicalTemplate x:Key="AdvancedVariableItemTemplate"

VariablesGroupsTemplate="{StaticResource AdvancedGroupSideTemplate}"

VariableSideTemplate="{StaticResource AdvancedGroupSeriesRadioTemplate}"

VariableTemplate="{StaticResource AdvancedVariableTemplate}"/>

<VariablesGroup:AdvVariableContainerStyleSelector x:Key="AdvancedVariableStyleSelector"

DarkThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"

LightThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"/>

</UserControl.Resources>

<Grid>

<telerik:RadTreeView x:Name="lstVariablesAdvanced" SelectedItem="{DynamicResource AdvancedVariableItemContainerStyle}" VerticalAlignment="Stretch" Grid.Row="1" Grid.ColumnSpan="2" BorderThickness="0,0,0,0" ScrollViewer.CanContentScroll="False"

IsEditable="True" SelectionMode="Extended" ItemsSource="{Binding LstAppDataSeriesGrouping}" IsDropPreviewLineEnabled="False" IsDragPreviewEnabled="True"

IsDragTooltipEnabled="False" MouseDown="lstVariablesAdvanced_MouseDown"

IsSingleExpandPath="True" IsExpandOnSingleClickEnabled="False" IsDragDropEnabled="False"

PreviewKeyDown="lstVariables_PreviewKeyDown" IsLineEnabled="True"

ItemTemplateSelector="{StaticResource AdvancedVariableItemTemplate}"

ItemContainerStyleSelector="{StaticResource AdvancedVariableStyleSelector}"

Margin="10,0,6,0">

</telerik:RadTreeView>

</Grid>

</UserControl>

TreeView

answered on 25 Aug 2016

2 answers

139 views

[Solved] Display NewRowPosition Button When Adding New Rows

Hello,

When I have NewRowPosition set to Bottom, I see the "Click here to add new item" button at the bottom of the GridView, as expected.

My issue is that when I click the NewRow button, the button disappears as I am adding the new row. Note that this only happens when adding a new row - when editing an existing row, the NewRow button appears as expected.

Is there a way to always have the NewRow button shown when adding new rows?

Thanks,

-Thanos

GridView

answered on 24 Aug 2016