I have the following XAML code:

<telerik:RadMultiColumnComboBox 
    VerticalAlignment="Top" 
    Width="250" 
    DisplayMemberPath="Name" 
    IsReadOnly="True" 
    SelectionMode="Single" 
    SelectionBoxesVisibility="Hidden" 
    CloseDropDownAfterSelectionInput="True"                   
    DropDownWidth="320"
    SelectedItem="{Binding SelectedMandant}">
    <telerik:RadMultiColumnComboBox.ItemsSourceProvider>
        <telerik:GridViewItemsSourceProvider ItemsSource="{Binding MandantCollection}" AutoGenerateColumns="False" RowIndicatorVisibility="Hidden"> 
            <telerik:GridViewItemsSourceProvider.Columns>
                <telerik:GridViewDataColumn Header="Mandant" DataMemberBinding="{Binding Path=Name}"/>
                <telerik:GridViewDataColumn 
                    Header="Letzter Abschluss" 
                    DataMemberBinding="{Binding Path=FibuAbschluss}" 
                    DataFormatString="{} {0:dd.MM.yyyy}" 
                    TextAlignment="Center" 
                    HeaderTextAlignment="Center"/>
            </telerik:GridViewItemsSourceProvider.Columns>
        </telerik:GridViewItemsSourceProvider>
    </telerik:RadMultiColumnComboBox.ItemsSourceProvider>
    <telerik:EventToCommandBehavior.EventBindings>
        <telerik:EventBinding EventName="SelectionChanged" Command="{Binding SelectedMandantChangedCmd}" RaiseOnHandledEvents="True" PassEventArgsToCommand="True"/>
    </telerik:EventToCommandBehavior.EventBindings>
</telerik:RadMultiColumnComboBox>

Now everything works fine beside that the first time when the UI is rendered, the RadMultiColumnComboBox Input does not show the current selected item.

I set the SelectedItem in the constructor of my view model:

private Mandant? _selectedMandant;
public Mandant? SelectedMandant
{
    get => _selectedMandant;
    set
    {
        _selectedMandant = value;
        OnPropertyChanged();
    }
}

public KontoViewModel(CommonDbContext commonDbContext, StruebyWinBContext winBContext)
 {
     ......
     if(MandantCollection.Count > 0)
     {
         SelectedMandant = MandantCollection[0];
         ......
     }
     .......
 }

I see that the SelectedMandat has a value and also it works fine after i select another item, then the item shows.

But the first time after loading, the RadMultiColumnComboBox Input does not show any value, its empty.

It should show the selected item that i set in the constructor of my view model.

Can anyone help me here, thanks

RadCircularProgressBar cannot set width and heighth!

What ever height and width I set for the RadCircularProgressBar, the total pane never change its size.

Its so stange, I want a small RadCircularProgressBar, how can i do it? it just keeps its original size.

Hi,

I have this code and i do not know how to bind to a view model command when i check a checkbox or when i write in a column.

<UserControl x:Class="WISN.Windows.Survey.FacilityStaffControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:vm="clr-namespace:WISN.Windows.Survey.ViewModels"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">

    <telerik:RadTreeListView x:Name="stufftreeListView" AutoGenerateColumns="False"
                                 AutoExpandItems="True" GroupRenderMode="Flat" CanUserDeleteRows="False"
                                 ItemsSource="{Binding AllStaffByType,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged }">
            <telerik:RadTreeListView.ChildTableDefinitions>
                <telerik:TreeListViewTableDefinition ItemsSource="{Binding StaffCategories,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"></telerik:TreeListViewTableDefinition>
            </telerik:RadTreeListView.ChildTableDefinitions>

            <telerik:RadTreeListView.Columns>
                <telerik:GridViewCheckBoxColumn DataMemberBinding="{Binding IsSelected}" AutoSelectOnEdit="True" EditTriggers="CellClick">
                    <telerik:EventToCommandBehavior.EventBindings>
                        <telerik:EventBinding Command="{Binding CustomCommandCommand}" EventName="MouseLeftButtonDown" />
                    </telerik:EventToCommandBehavior.EventBindings>
                </telerik:GridViewCheckBoxColumn>
                <telerik:GridViewDataColumn IsReadOnly="True" DataMemberBinding="{Binding Name}" Header="Stuff"></telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding AnnualSalary}" Header="Annual Salary"></telerik:GridViewDataColumn>
            </telerik:RadTreeListView.Columns>
        </telerik:RadTreeListView>
</UserControl>

Thanks

Hi,

I am using <telerik:RadTreeListView> and the scroll functionality does not work. this is how my code looks like:

<UserControl x:Class="WISN.Windows.Survey.FacilityStaffControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:vm="clr-namespace:WISN.Windows.Survey.ViewModels"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">

    <telerik:RadTreeListView x:Name="stufftreeListView" AutoGenerateColumns="False"
                                 AutoExpandItems="True" GroupRenderMode="Flat" CanUserDeleteRows="False"
                                 ItemsSource="{Binding AllStaffByType,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged }">
            <telerik:RadTreeListView.ChildTableDefinitions>
                <telerik:TreeListViewTableDefinition ItemsSource="{Binding StaffCategories,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"></telerik:TreeListViewTableDefinition>
            </telerik:RadTreeListView.ChildTableDefinitions>

            <telerik:RadTreeListView.Columns>
                <telerik:GridViewCheckBoxColumn DataMemberBinding="{Binding IsSelected}" AutoSelectOnEdit="True" EditTriggers="CellClick">
                    <telerik:EventToCommandBehavior.EventBindings>
                        <telerik:EventBinding Command="{Binding CustomCommandCommand}" EventName="MouseLeftButtonDown" />
                    </telerik:EventToCommandBehavior.EventBindings>
                </telerik:GridViewCheckBoxColumn>
                <telerik:GridViewDataColumn IsReadOnly="True" DataMemberBinding="{Binding Name}" Header="Stuff"></telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding AnnualSalary}" Header="Annual Salary"></telerik:GridViewDataColumn>
            </telerik:RadTreeListView.Columns>
        </telerik:RadTreeListView>
</UserControl>

I really do not know how to fix it.

Thanks

I'm trying to create a file upload or download function to the cloud in WPF.

I heard that this product can upload to the cloud, but I would like to know if it is compatible with all clouds.

I would also like to know the maximum size that can be uploaded.

In my `telerik:RadGridView`, I have configured a `CellValidating="RadGridView_CellValidating"` callback.  It successfully catches a validation error, which then invokes this code:

e.IsValid = false;
e.ErrorMessage = "Enter a valid URL with 'https://' or 'http://'";

The cell does properly receive a red border, and what looks like a tool-tip notation in the top right corner.  However, unfortunately, I am unable to see the tool-tip, regardless if I hover or click on the tool-tip.  What are perhaps the top three to five reasons this might be happening?

It is specifically the "Documentation" column above, which is a `GridViewHyperlinkColumn`, which is failing validation...with no tool-tip showing.  To be clear, actually none of the columns have a working or "showable" tool-tip.  Even so, here is the code specifically for my "Documentation" column:

    <telerik:GridViewHyperlinkColumn
        IsReadOnly="{Binding IsEditModeWithPermissions, Converter={StaticResource InverseBooleanConverter}}"
        CellStyle="{StaticResource GridViewCellStyleStretch}" IsCustomSortingEnabled="False"
        ValidatesOnDataErrors="InViewMode"
        UniqueName="Documentation"
        MinWidth="80" MaxWidth="350" Width="150"
        DataMemberBinding="{Binding Documentation}"
        Name="DocumentationColumn" Header="Documentation">
        <telerik:GridViewHyperlinkColumn.CellTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding DocumentationFormatted, StringFormat='{}{0}'}"/>
            </DataTemplate>
        </telerik:GridViewHyperlinkColumn.CellTemplate>
        <telerik:GridViewHyperlinkColumn.CellEditTemplate>
            <DataTemplate>
                <telerik:RadComboBox x:Name="DocumentationBox"
                    Text="{Binding Documentation, Mode=TwoWay}" KeyDown="RadComboBox_PreviewKeyDown"
                    IsTextSearchEnabled="True" TextSearchMode="StartsWith" OpenDropDownOnFocus="True"
                    StaysOpenOnEdit="False" Loaded="RadComboBox_Loaded" IsEditable="True" >
                    <telerik:RadComboBox.Resources>
                        <Style TargetType="TextBox">
                            <Setter Property="MaxLength" Value="{Binding DocumentationColumnWidth}" />
                        </Style>
                    </telerik:RadComboBox.Resources>
                </telerik:RadComboBox>
            </DataTemplate>
        </telerik:GridViewHyperlinkColumn.CellEditTemplate>
    </telerik:GridViewHyperlinkColumn>

And here is the RadGridView initial declaration:

    <telerik:RadGridView Grid.Row="1"
        CellValidating="RadGridView_CellValidating"
        BorderThickness="{Binding GridBorderThickness}"
        SelectedItem="{Binding SelectedLineItem, Mode=TwoWay}" Pasting="UxGrid_OnPasting"
        SelectionChanged="UxGrid_OnSelectionChanged" CopyingCellClipboardContent="UxGrid_OnCopyingCellClipboardContent"
        RowIndicatorVisibility="Visible"
        ValidatesOnDataErrors="InViewMode"
        EditTriggers="CellClick"
        ActionOnLostFocus="CommitEdit" Name="uxGrid"
        PreparingCellForEdit="uxGrid_PreparingCellForEdit" Deleted="UxGrid_OnDeleted"
        CellEditEnded="uxGrid_CellEditEnded"
        KeyDown="GridKeyDown"
        ScrollMode="Deferred"
        IsReadOnly="{Binding IsGridEditable, Converter={StaticResource InverseBooleanConverter}}"
        CanUserDeleteRows="{Binding CanEditNotReleased}" CanUserInsertRows="False"
        AreRowDetailsFrozen="True" EnableColumnVirtualization="False"
        RowDetailsVisibilityMode="{Binding RowDetailsVisibility}"
        DataLoaded="UxGrid_OnDataLoaded"
        RowEditEnded="RadGridViewRowEditEnded" BeginningEdit="RadGridViewBeginningEdit"
        AlternationCount="2" AutoGenerateColumns="False" 
        ItemsSource="{Binding LineItemsView, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="uxGrid_SourceUpdated_1"
        Loaded="uxGrid_Loaded"
        LoadingRowDetails="UxGrid_OnLoadingRowDetails"
        ColumnWidthChanged="GridViewDataControl_OnColumnWidthChanged"
        DataContext="{Binding}"
        ColumnReordering="uxGrid_ColumnReordering"
        CanUserSortColumns="{Binding IsEditMode, Converter={StaticResource InverseBooleanConverter}}"
        IsFilteringAllowed="{Binding IsEditMode, Converter={StaticResource InverseBooleanConverter}}">

Use Case

our users have the possibility to save and load their own RadGridView filter settings.

One user want to get all entries where the value of the property \ column "CreateionDateUtc" is older than 90 days.

Problem

Currently you can only configure Is Less Than "Fixed Date". That means you have to change the "Fixed Date" every day to get the required result.

Is there a possibility to add a filter to the DateTime Column for example Less than 90 Days?

Thanks

Hi

In RadGridView, I want to change the language of "click here to add new item" to Chinese(check the attachment please), any idea? thanks

-Jeffrey