Questions on UI for WPF Forum

5 answers

2.0K+ views

Hi. I'm developing a form on which the user can select one of many reports to show, and I have two questions on the GridView:

Do you always have to specify a Columns collection? I mean, because I can have many different reports for the same GridView, I want to be able to show them all without having to specify the columns individually.
How do you programatically hide or show a column at a specific index or with a specific header? My user wants to be able to hide some columns before exporting the report results, so I'm planning on showing him a CheckBox list with the columns, so he can choose which ones to show/hide.

Thanks a lot.

GridView

answered on 13 Sep 2010

6 answers

214 views

RadGridView Edit Problem

I have following column amongst other columns:

...

<grid:GridViewDataColumn IsReadOnly="False" IsSortable="False" Header="Comment"

DataMemberBinding="{Binding Comment}" MaxWidth="250" IsResizable="False" >

<grid:GridViewDataColumn.CellEditTemplate>

</DataTemplate>

</grid:GridViewDataColumn.CellEditTemplate>

</grid:GridViewDataColumn>

...

Issue:

When there is more than one row in the grid, editing of this cell can be ended in whatever way (by focusing on some other field, pressing enter... etc.) and the grid will retain the value entered. Such value will also be updated into the database by:

private

void radGridView1_CellEditEnded(object sender, GridViewCellEditEndedEventArgs e)
{...}

However, when there is only one row in the grid, pressing enter to end the cell edit works for retaining the value just entered for the cell but not triggering "CellEditEnded". Therefore, the value entered is not being put into the database...

Is there anyway someone help me with this?

Thanks for your time in advance,

K

GridView

answered on 13 Sep 2010

1 answer

59 views

Quadrant style gauge dyncamically..

i need to create quadrant-style gauge and semicircle gauge dynamically using vb.net or c#.net code please help me out..!!

Regards,
Kapil Garg

Gauges

answered on 13 Sep 2010

6 answers

356 views

when adding a new row, the RowEditEnded event fires before the new row appears

Hello :)

I have a problem when I try to add a new row to the gridview,

In short, I have an empty gridview and the event RowEditEnded fires before the new row appears for editing and without the user presses enter when adding a new row into the gridview when the grid view is not empty (when the gridview is empty RowEditEnded event fires after the user presses enter).

My scenario is the following:

When the gridview is empty, I use the BeginInsert() method to insert a new row, then the handler for the AddingNewDataItem gets executed, then appears a new row on the gridview with the first cell on edit mode, then I fill all the cells on the gridview and after that I hit enter, after I press enter the handler for the RowEditEnded event gets executed with e.EditOperationType==Insert and e.EditAction==Commit, (in this handler I add the new row to a data base) and so far so well, but when I want to insert an other new row, the handler for the AddingNewDataItem event gets executed and just after that (and here is the problem) the handler for the RowEditEnded event gets executed with e.EditOperationType==Insert and e.EditAction==Commit (without the new row appears for editing and without the user presses enter) and after that the row appears on the grid view ready for editing (also for default appears the last cell of the row in edit mode and for this reason I have to press esc and go to the first cell of the row), so the RowEditEnded event fires before the new row appears for editing and without the user presses enter.

Is this the default behavior or am I doing something wrong?

void NuevoProveedorButton_Click(object

sender, RoutedEventArgs e)

{

this

.ProveedoresGridView.BeginInsert();

}

void ProveedoresGridView_AddingNewDataItem(object

sender, GridViewAddingNewEventArgs e)

{

e.NewObject = new

Proveedor_TipoProveedor();

}

GridView

answered on 13 Sep 2010

1 answer

111 views

Localization

Hi,

I'm using a RadTimePicker in a ControlTemplate and would like to set "DateTimeWatermarkContent" to another value. Unfortunately the value is not used and shows still "Enter time". Also I would like to change the Header on the drop down clock which has value "Clock".

Here the code:

<ContentControl Grid.Row="1" Grid.Column="1" Width="80" Style="{StaticResource styleContentControlTime}" Content="{Binding OfficeHour.MondayOpen, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" ></ContentControl>

here the style:

<Style x:Key="styleContentControlTime" TargetType="ContentControl">
        <Setter Property="IsTabStop" Value="false"></Setter>
        <Style.Triggers>
            <DataTrigger Binding="{Binding Path=InEditMode}" Value="true">
                <Setter Property="ContentControl.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                                <telerik:RadTimePicker SelectedValue="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentControl}}, Path=Content, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                                                       Margin="10,3" DateTimeWatermarkContent="" >
                                </telerik:RadTimePicker>
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </DataTrigger>

            <DataTrigger Binding="{Binding Path=InEditMode}" Value="false">
                <Setter Property="ContentControl.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Grid >
                                <TextBlock Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentControl}}, Path=Content, Converter={StaticResource dateTimeToTimeStringConverter}}"
                                           Style="{StaticResource styleTextBlock}" VerticalAlignment="Center"></TextBlock>
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </DataTrigger>
        </Style.Triggers>
    </Style>

regrads,
Timo

TimePicker

answered on 13 Sep 2010

7 answers

396 views

Colour palette for 3D pie chart (WPF)

Hi,

I've been evaluating the WPF charting component and am really struggling to find out how to change the colour palette for a pie chart. Can anyone help?

Also noticed that when you resize the width of a window containing a 3D pie chart, the chart will scale, but if you adjust the height, it doesn't. Am I doing something wrong? Code below:

    
            <Window x:Class="Telerik1.Window1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                xmlns:controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls" 
        
                Title="Window1" Height="600" Width="800" Loaded="ExampleControl_Loaded" Unloaded="ExampleControl_Unloaded">  
        
                <Window.Resources> 
        
                    <Style TargetType="{x:Type telerik:RadChart}">  
        
                        <Setter Property="telerik:Theming.Theme">  
        
                            <Setter.Value> 
        
                                <telerik:VistaTheme/> 
        
                            </Setter.Value> 
        
                        </Setter> 
        
                    </Style> 
        
                </Window.Resources> 
        
                <Grid> 
        
                    <telerik:RadChart x:Name="RadChart1" /> 
        
                </Grid> 
        
            </Window>

Thanks,
Gary.

Chart

answered on 13 Sep 2010

1 answer

119 views

Virtualized RadTreeView and ScrollViewer.LineUp

If I call this code in a virtualized scroll viewer with 3000 thousand items, the ScrollViewer won't move even 25% of the number of times I call it:

for (int i = 0; i < 1000; i++)

{

radTreeView.ScrollViewer.LineDown();

}

For some reason it stops at some point. Let me know if there's a way to fix this. I want to be able to move the RadTreeView a certain amount of times when the user clicks on a button, but this is preventing me from doing it, some times the amount is very large as in the example code above.

Thanks.

TreeView

answered on 13 Sep 2010

1 answer

122 views

Clearing bug?

Hi,
I have the following combobox that I am trying to use essentially as an edit field and the dropdown list as a collection of predefined values that the user can select.

The problem is that the 'Clear' button in the dropdown list (that shows up due to the 'ClearSelectionButtonVisibility' property) does not always clear the text. It works fine if I select an item from the dropdown list before the clear, but if I type in text that does not match any of the items then it does nothing.
Best regards,
Pete

<telerik:RadRibbonComboBox

CanAutocompleteSelectItems="True"

CanKeyboardNavigationSelectItems="True"

ClearSelectionButtonVisibility="Visible"

EmptyText="Enter text"

FilteringMode="Contains"

IsEditable="True"

IsFilteringEnabled="True"

IsReadOnly="False"

ItemsSource="{Binding Source={x:Static local:Core.App}, Path=SummaryTextForAllGames, Mode=OneWay}"

MinWidth="250"

OpenDropDownOnFocus="True"

StaysOpenOnEdit="True"

Text="{Binding Path=Value, Mode=TwoWay}"

TextSearchMode="Contains"

VerticalAlignment="Center"

/>

ComboBox

answered on 13 Sep 2010

3 answers

300 views

RadTreeView virtualization bug

When I use the page down key or the mouse wheel to scroll down a virtualized RadTreeView, I get this bug:

The RadTreeViewItems that disappear are actually null when I get in to debug. Why does this happen? It's causing me a problem where a RadTreeViewItem I'm tracking suddenly disappears from memory, even though I have a few other pointers referencing it, it just goes away.

Let me know if there is a solution to this.

Thanks!

Here's my code:

XAML:

<Window x:Class="TreeViewComparison.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"

Title="Window1" Height="305" Width="627">

<Window.Resources>

<HierarchicalDataTemplate x:Key="ItemTemplate" ItemsSource="{Binding SubItems}">

<TextBlock Text="{Binding Header}"/>

</HierarchicalDataTemplate>

<Style TargetType="telerik:RadTreeViewItem">

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

</Style>

</Window.Resources>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="*" />

<RowDefinition Height="Auto" />

</Grid.RowDefinitions>

<telerik:RadTreeView x:Name="radTreeView"

Grid.Row="0"

IsVirtualizing="True"

ItemTemplate="{StaticResource ItemTemplate}" />

<Button x:Name="buttonBreakpoint" Grid.Row="1" Margin="8" Content="Breakpoint" Click="buttonBreakpoint_Click" />

</Grid>

</Window>

C#:

using System;

using System.Collections.ObjectModel;

using System.Windows;

namespace TreeViewComparison

{

/// <summary>

/// Interaction logic for Window1.xaml

/// </summary>

public partial class Window1 : Window

{

public Window1()

{

InitializeComponent();

this.radTreeView.ItemsSource = GenerateItems();

}

private ObservableCollection<DataItem> GenerateItems()

{

ObservableCollection<DataItem> result = new ObservableCollection<DataItem>();

for (int i = 0; i < 10; i++)

{

DataItem item = new DataItem(String.Format("Item {0}", i));

for (int j = 0; j < 100; j++)

{

item.SubItems.Add(new DataItem(String.Format("Item {0}.{1}", i,j)));

}

result.Add(item);

}

return result;

}

class DataItem

{

public DataItem(string header)

{

this.SubItems = new ObservableCollection<DataItem>();

this.Header = header;

}

public string Header { get; set; }

public ObservableCollection<DataItem> SubItems { get; set; }

}

private void buttonBreakpoint_Click(object sender, RoutedEventArgs e)

{

}

TreeView

answered on 13 Sep 2010

1 answer

35 views

Drag a RadPane to another RadDocking

Hello:

Quick question: Is it possible to drag a RadPane from one RadDocking (source) to another one (target)? Can I dock it to the target RadDocking?

thanks

Docking

answered on 13 Sep 2010