Questions on UI for WPF Forum

3 answers

194 views

Custom control derived from RadCombobox errors in Expression Blend

I have created a custom control derived from RadCombobox. It compiles and runs fine in Visual Studio. But if I use Expression Blend to view a screen containing my custon control, I receive a design time error stating "Object reference not set to an instance of an object". This happens even if the derived class contains an insignificant amount of code. If I place RadCombobox directly on the screen (e.g. without wrapping it in a custom control), it shows up fine.

Here is my custom control:

    public class ccComboBox : RadComboBox
    {
        public int i;
    }

Here is my xaml:
    <Grid>
        <StackPanel>
            <telerik:RadComboBox Height="30" Width="200" Background="LightBlue"/>
            <cc:ccComboBox Height="30" Width="200" Background="LightBlue"/>
            <cc:ccDatePicker />
        </StackPanel>
    </Grid>

Only the ccComboBox xaml causes the error. ccDatePicker is derived from RadDatePicker and works fine.

Any help is greatly appreciated.

Doug

General Discussions

answered on 14 Jun 2011

1 answer

271 views

Change Localization Dynamically

Is it possible to change the localization dynamically, while the application is running ?
I tried this:

public CultureInfo UICulture
        {
            get
            {
                return Thread.CurrentThread.CurrentUICulture;
            }
            set
            {
                if (value == null)
                {
                    throw new ArgumentNullException("value");
                }

                Thread.CurrentThread.CurrentUICulture = value;

                if ( Telerik.Windows.Controls.LocalizationManager.Manager != null )
                {
                    Telerik.Windows.Controls.LocalizationManager.Manager.Culture = value;
                }

                UpdateLocalizations();
            }
        }

This doesn't seem to work. The culture that I'm passing is fr-FR, and it seems you support the French language. What am I missing ?

Thanks,
Sebastien

ScheduleView

answered on 14 Jun 2011

1 answer

96 views

From a list of folders populate a treeview question...

In our database, we have a huge list of files in a table that we would like to show on a treeview. The thing is that the field that contains the info is saved in a string in the following format:

c:\rootfolder\2011\03\10\folder\file.docx
c:\rootfolder\2011\02\11\folder\another.docx
c:\rootfolder\2011\03\10\folder\thisfile.docx

They are all saved in an object List<Item> that contains a property whose name is Object.FullPath

I was wondering if the wpf radtreeview has already built-in on the control where you pass the info and automatically parses the content.

Any thoughts?

TreeView

answered on 14 Jun 2011

1 answer

193 views

RadGridView: DateTime filter

How to change default filter in radgridview for datetime from raddatepicker to raddatetimepicker?

DateTimePicker

answered on 14 Jun 2011

1 answer

510 views

how to change left side width and color for context menu?

how to change left side width and color for context menu? and select row style?

could you paste default style for the control?

thanks

jeorme

ContextMenu

answered on 14 Jun 2011

1 answer

115 views

How to Filter values that equals to null

Hi, Data Filter has many filter condtion such as " Is Equal To", "Contains", "Not Contained In" and so on.
Does it support "Has Value" to filter those value is not null?
If not, can I extend it myself to do it? How?

DataFilter

answered on 14 Jun 2011

7 answers

253 views

GridView FilterControl Hide 'Match Case'

Hello,

I need to hide the 'Match Case' from the FilterControl in the RadGridView as im using it for different language than english.
Is there a way to accomplish that?

Thanks,

GridView

answered on 14 Jun 2011

3 answers

87 views

RadGrid is Sqeezing when populated large data.

Hi All,

I am working on WPF 4.0 and using telerik grid in it.

The following Style i have applied for the Radgridview in my application.

<Style TargetType="telerik:GridViewHeaderCell">

<Setter Property="Background" Value="{StaticResource MainHeaderColor}"/>

<Setter Property="BorderBrush" Value="#D4D6D6"/>

<Setter Property="BorderThickness" Value="1"/>

<Setter Property="VerticalContentAlignment" Value="Center" />

<Setter Property="HorizontalContentAlignment" Value="Center" />

</Style>

<Style x:Key="GridViewHeaderRowStyle" TargetType="{x:Type telerik:GridViewHeaderRow}">

<Setter Property="Background" Value="White"/>

<Setter Property="BorderBrush" Value="#D4D6D6"/>

</Style>

<Style x:Key="AlternateRowStyle" TargetType="{x:Type telerikGridView:GridViewRow}">

<Setter Property="Background" Value="#E3F0F9" />

<Setter Property="BorderBrush" Value="#D4D6D6" />

</Style>

<Style x:Key="GridViewRowStyle" TargetType="{x:Type telerikGridView:GridViewRow}">

<Setter Property="Background" Value="White" />

<Setter Property="BorderBrush" Value="#D4D6D6" />

</Style>

<Style x:Key="DataCellsPresenter" TargetType="{x:Type telerik:GridViewHeaderRow}">

<Setter Property="Background" Value="{StaticResource MainBackgroundColor}" />

<Setter Property="BorderBrush" Value="#D4D6D6" />

</Style>

<DataTemplate x:Key="GridViewHeaderIndentCellDataTemplate">

<telerik:GridViewHeaderIndentCell BorderBrush="#D4D6D6"/>

</DataTemplate>

<DataTemplate x:Key="GridViewHeaderIndicatorPresenterTemplate">

<telerik:IndicatorPresenter x:Name="PART_IndicatorPresenter"

Background="{StaticResource MainBackgroundColor}"

BorderBrush="{StaticResource SeperatorColor}"

BorderThickness="1"

Grid.Column="0" HorizontalAlignment="Left"

Width="24"/>

</DataTemplate>

<Style TargetType="{x:Type telerik:RadGridView}">

<Setter Property="HeaderRowStyle" Value="{DynamicResource GridViewHeaderRowStyle}"/>

<Setter Property="AlternateRowStyle" Value="{DynamicResource AlternateRowStyle}"/>

<Setter Property="IsFilteringAllowed" Value="false"/>

<Setter Property="RowStyle" Value="{DynamicResource GridViewRowStyle}"/>

<Setter Property="GridLinesVisibility" Value="Both"/>

<Setter Property="Cursor" Value="Hand"/>

<Setter Property="Background" Value="White" />

<Setter Property="VerticalGridLinesBrush" Value="#D4D6D6"/>

<Setter Property="HorizontalGridLinesBrush" Value="#D4D6D6"/>

<Setter Property="RowIndicatorVisibility" Value="Collapsed"/>

<Setter Property="AlternationCount" Value="2"/>

<Setter Property="VerticalAlignment" Value="Top"/>

<Setter Property="HorizontalAlignment" Value="Center"/>

<Setter Property="ShowGroupPanel" Value="False"/>

<Setter Property="AutoGenerateColumns" Value="False"/>

<Setter Property="IsReadOnly" Value="True"/>

<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>

<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>

<Setter Property="IsScrolling" Value="false"/>

<Setter Property="Margin" Value="0,0,0,0"/>

</Style>

Now when I am using this Radgrid in my application and opening the screen then at that time the grid first squeeze and then open up in the screen withits full width.In some screens its also giving a jerking effect and then opening properly.

Kindly let me know why is it happening so ?

Thanks in advance !!!!!!

GridView

answered on 14 Jun 2011

2 answers

123 views

Can't type comma in filter-popup

I have a RadGridView where one of the columns is of type decimal. I want to be able to filter that by decimal numbers, but it's impossible to type commas in the textboxes in the filtering popup.

The filtering itself works fine. I've tried to apply a filter with a decimal (0.5) with code and it works: the correct rows are displayed and the rest are hidden. But when I did this the textbox in the popup displayed '0' and not '0.5'.

Why is this and is there any way around this? Is it a bug or is it by design? Hopefully it is not by design because that would render the filtering useless in my case since all my numbers are less than 1...

GridView