Questions on UI for WPF Forum

1 answer

104 views

Canceling SelectionChanging event and expanding item causes a crash

I just want to let you know about a bug that I found and I do not really see how to report a bug (and not a feature suggestion) in the issue tracker.

I have a RadTreeListView.
I want to click on an item on the list to expand it.
So that I implemented the following:

<t:RadTreeListView x:Name="radTreeListView" AutoGenerateColumns="False" SelectionChanging="radTreeListView_SelectionChanging">

<t:RadTreeListView.ChildTableDefinitions>

<t:TreeListViewTableDefinition ItemsSource="{Binding Children}" />

</t:RadTreeListView.ChildTableDefinitions>

<t:RadTreeListView.Columns>

<t:GridViewDataColumn DataMemberBinding="{Binding Name}" Header="Name" IsReadOnly="True" >

<t:GridViewDataColumn.CellTemplate>

<DataTemplate>

<Label Content="{Binding Name}"></Label>

</DataTemplate>

</t:GridViewDataColumn.CellTemplate>

</t:GridViewDataColumn>

</t:RadTreeListView.Columns>

</t:RadTreeListView>

and a handler:

private void radTreeListView_SelectionChanging(object sender, SelectionChangingEventArgs e)

{

var selectedItem = e.AddedItems.FirstOrDefault();

e.Cancel = true;

this.radTreeListView.ExpandHierarchyItem(selectedItem);

}

This causes an exception when I start the application (basically, when the selection is changing).

Removing e.Cancel = true line solves the issue, but well... if I want to cancel this event, then the app crashes.

TreeListView

answered on 20 Jan 2014

2 answers

1.0K+ views

[Solved] MessageBox automatically closed after closing a RadWindow

Hi everyone,

I am developing a WPF application in my company.
I use RadControls for WPF Q3 2013 trial version.

I have written a sample project made up of a MainWindow and a UserControl.
The MainWindow contains a Button and I have written an handler to the Button's Click event.

Here is the MainWindow's code-behind :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Telerik.Windows.Controls;

namespace MessageBoxAutoClosed

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}

private void Button_Click(object sender, RoutedEventArgs e)

{

UserControl1 l_userControl = new UserControl1();

RadWindow l_hostWindow = new RadWindow()

{

Owner = System.Windows.Application.Current.MainWindow,

WindowStartupLocation = WindowStartupLocation.CenterOwner

};

ScrollViewer l_scrollViewer = new ScrollViewer();

l_scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;

l_scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;

l_scrollViewer.Content = l_userControl;

l_hostWindow.Content = l_scrollViewer;

l_hostWindow.Show();

//l_hostWindow.Close();

MessageBox.Show("MessageBox", "MessageBox", MessageBoxButton.OK, MessageBoxImage.Information, MessageBoxResult.OK);

}

I do not have to click the OK button in the MessageBox to close it because the MessageBox is automatically closed.
Why ?

The MessageBox is not automatically closed when the following line is missing : l_hostWindow.Close();

Thank you in advance for your help

Window

answered on 20 Jan 2014

1 answer

162 views

Don't want Chart to rescale automatically

Hi,

Currently I have a candlestick chart as a usercontrol imbedded in a dock control. everytime I resize my min window, the chart resizes as well, causing it to become more and more compressed.

Instead, I would much prefer if my chart does not automatically resize with the main window, but instead, is clipped. In this case, the user would have to use the scroll bar to view the clipped part of the chart.

Can anyone suggest a way that this may be done, or point me in the direction of a WPF example?

Thanks in advance.

Chart

answered on 20 Jan 2014

2 answers

308 views

Spreadsheet with mvvm?

Hi buddy,
I have a question about Spreadsheet with mvvm ,because i use mvvm pattern so i need to know how to apply spreadsheet with dynamic data on mvvm pattern

Spreadsheet

answered on 20 Jan 2014

0 answers

146 views

How to update the RadGridView when the filter is set?

I have telerik RadGridView with columns "status", "Name" and a RadButton with name "Update", when the grid is loaded the rows will have different status like "pending" "unread" and "cleared". When user selects a row with status pending and clicks on button "update" the status will change from pending to cleared. The issue is when we set a filter on status column with "pending" only rows with pending status are shown, here when user selects a row and click on update the status changes to "cleared", as the filter is already set, the row with the cleared status also shown. As we update the row it is not removed from the grid.

GridView

asked on 17 Jan 2014

2 answers

156 views

RadGridView inside RadDataForm

Hello

I would like to use the RadDataForm as interface for a invoice manager.

Here I would like to use the RadGridView to enter a list of products. If the user clicks the escape or enter keyboard button inside the RadGridView, the the commit or cancel action gets executed of the RadDataForm. How can we prevent this?

Thank you!

ScheduleView

answered on 17 Jan 2014

2 answers

187 views

Load/Deserialize with GraphSource?

I would like to be able to Load (and Save) a diagram by initiating the operation in the ViewModel.

Currently, I need to inherit from RadDiagram and override the OnOpenCommandExecuted method to have custom Load behaviour. This is fine, except that I would like to Clear the diagram before Loading the saved XML. I can't use the RadDiagram.Clear() method when using GraphSource, however.

Short of implementing my own Serialize/Deserialize in ViewModels, is there a nice way to achieve this currently?

Thanks

Diagram

answered on 17 Jan 2014

1 answer

101 views

Overwriting selection with Shift pressed crashes RadRichTextBox

I've got an empty WPF app with only a RadRichTextBox in there.So my XAML looks like:

<Grid>

<t:RadRichTextBox />

</Grid>

1. I run the application.
2. I type "bug" to the rich text box.
3. I double click on the word "bug" to select the whole word (double click it with mouse, do not select with keyboard)
4. I press Shift and I keep it pressed.
5. I start to type "BUG"

After "U" is typed I get an InvalidOperationException.

Do you have the same problem? Do you know is it a known bug? Is there any fix expected to it?
My build version is: 2013.3.1204.45

RichTextBox

answered on 17 Jan 2014

5 answers

1.5K+ views

[Solved] Parent property name with nested properties not updating

Hello!

I encountered the problem with parent property name which not updates if I modify child properties.
I have a class which overrides ToString() to return format string of its properties. When I change one of that property I fire PropertyChanged but ToString() never calling again and I see old name of parent property on GUI.
But the name is changing and ToString() is calling on each expanding/collapsing or searching.

Is it by desing or I have to do smth extra?

Here is a sample project with Q2 2013 libs to illustrate the problem.

PropertyGrid

answered on 17 Jan 2014

1 answer

120 views

Grid View Touch auto complate do not work

I am evaluating Grid view with inline edit
In cell template i have added rad auto complete box.
when grid is loaded with data, if mouse click on the cell having auto complete box in grid, auto complete box went in edit mode.
But with windows 8 touch theme and on all in one touch PC when through touch if click on same cell it does not goes into edit mode

Please help

GridView

answered on 17 Jan 2014