Questions on UI for WPF Forum

3 answers

248 views

ScheduleView NullReferenceException when changing the view

Hi.

I have a problem with the ScheduleView. When changing the view from Month to Day, i get a NullReferenceException.

I've attached a sample.

Steps to reproduce the problem :
* run the sample
* expand the cell filled with data
* switch the view to Day

I get a NullReferenceException at that point.

The stack trace is :

at Telerik.Windows.Controls.GroupHeader.InitializeColumnsAndUpdateMaxIntersectedAppointmentsCount()

at Telerik.Windows.Controls.GroupHeader.Initialize()

at Telerik.Windows.Controls.AppointmentsPanel.AddHeaders(GroupHeader header, Boolean isHorizontal, Boolean showWeekHeaders, Calendar calendar, CalendarWeekRule weekRule, DayOfWeek firstDayOfWeek)

at Telerik.Windows.Controls.AppointmentsPanel.MeasureOverride(Size availableSize)

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)

(...)

The xaml i used is :

<Window x:Class="scheduleViewError.MainWindow"

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:scheduleView="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.ScheduleView"

Title="MainWindow" Height="350" Width="525">

<Grid>

<telerik:RadScheduleView x:Name="scheduleview" Grid.Row="2" Grid.Column="2" Margin="0"

AppointmentsSource="{Binding Appointments}"

BorderThickness="0 1 1 1"

FirstVisibleTime="06:00">

<telerik:RadScheduleView.ViewDefinitions>

<telerik:MonthViewDefinition />

<telerik:DayViewDefinition />

</telerik:RadScheduleView.ViewDefinitions>

</telerik:RadScheduleView>

</Grid>

</Window>

the code-behind is :

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

this.DataContext = new ViewModel();

}

public class ViewModel

{

private ObservableAppointmentCollection _apppointments;

public ViewModel()

{

var today = DateTime.Today;

var x = new ObservableCollection<Appointment>(Enumerable.Range(9, 14).Select(i =>

new Appointment

{

Start = today.AddMinutes(i * 60 + 15),

End = today.AddMinutes((i + 1) * 60),

Subject = string.Format("Appointment num. {0}", i),

}));

_apppointments = new ObservableAppointmentCollection();

_apppointments.AddRange(x);

}

public ObservableAppointmentCollection Appointments

{

get

{

return _apppointments;

}

set

{

if (_apppointments == value)

return;

_apppointments = value;

}

I used the 2012.2.607.40 version of the library with .Net Framework 4.0.

ScheduleView

answered on 04 Jul 2012

1 answer

106 views

binding

First, I'm a beginner. I saw the examples/demos but all asume that the list of pages for the book is hardcoded in the program. How to make a book that can load any number of pictures by simply placing those pictures in a folder? Or, better, if those files are listed in a text file or xml file how to read from this file and load the items in the book.
Another issue: In the binding example you are using a xmlns:viewModels="clr-namespace:Telerik.Windows.Examples.Book.Binding". Durring build I get an error about that line (I have exacly the same lines of code as your example and added the same pictures in the project). Can you help me find what I'm missing?

Book

answered on 04 Jul 2012

10 answers

1.3K+ views

How can you independently change the FontSize for Row Data and Column Headers?

Right now if you change the RadTreeListView.FontSize it changes ALL FONTS on the control.

I want to be able to independently set the Font Size of the data displayed in the rows and the column headers. Basically I want to fix the column header text to one size, and then allow the user to change the font size of the data in the rows.

However it looks really bad when the user is changing this and the header changes with it. I basically have hooked up the scroll wheel to change the font size on the TreeListView and it works just kind of looks bad that the header is changing with it and would like to lock that down if possible.

Thanks.

TreeListView

answered on 03 Jul 2012

12 answers

342 views

RadGridView and Docking problem

Hi,

We have been using 2010 Q2 all this while. We recently upgraded to 2012 Q1. After the upgrade we are running into multiple issues.

We are using Docking in our application. On one of the radpanes we have gridview. On this gridview the showgrouppanel is set to false.
Now when we undock one of the pinned dockpanes, the gridview displays grouppanel and the data is grouped.
This should not be the case.

GridView

answered on 03 Jul 2012

3 answers

501 views

Background of disabled DatePicker

Hey Guys,

Can you give me a hand and tell me how to change Background Color of TextBox of disabled DatePicker? I attached the screenshot.

Regards,
Tom

DatePicker

answered on 03 Jul 2012

1 answer

114 views

Does Coded UI support the following WPF Rad controls?

Hello Telerik,

I would be grateful if you could answer me on the following question: Does Coded UI recognize and fully support the following WPF Rad controls:

RadDatePicker
RadMaskedTextBox
RadGridView
RadTreeView
RadTreeListView
RadOutlookBar
RadTimePicker
RadComboBox
RadBusyIndicator
RadTileView
RadChart
RadCalendar
RadColorPicker
RadProgressBar

I look forward to hearing from you at your earliest convenience.

Thank you.

Stas.

General Discussions

answered on 03 Jul 2012

6 answers

359 views

Adding/Editing timestamp column in the grid

I have a scenario where one column in the table is a timestamp (date + time). I have my grid column configured as follows:

<telerik:GridViewDataColumn

UniqueName="Timestamp"

DataMemberBinding="{Binding Timestamp}"

Header="Timestamp"

DataFormatString="{} {0:MM/dd/yyyy HH:mm:ss}"

IsFilterable="False" />

The property is coded as:

public DateTime? Timestamp

{

get

{

... returns either NULL or datetime object

}

set

{

_timestamp = value;

}

The display part is working fine: an example of the value displayed is: 12/20/2020 18:40:00

The problem I have is when adding a new row or editing an existing row. When adding a new row, the grid displays an empty row, and if I type in "12/20/2020 18:40:00" and tab out of the column to go to the next column, the timestamp column value is set to NULL (when putting a breakpoint on setter) and the timestamp I entered is wiped out. If I just type the date part (12/20/2020) and tab out, things work fine: the value is set correctly and the column displays "12/20/2020 00:00:00". I observe similar behavior when trying to edit a row. Do I need to specify a mask, a converter, or something else to get the column to properly accept the timestamp?

Thanks

Andrey

GridView

answered on 03 Jul 2012

1 answer

102 views

constrain ResizeBehavior to days

I have a gantt chart wherein the time is measured in days, at the finest level. So time is not necessary for me.

I am using RadDateTimePicker controls for start/end, and I can control their behavior (limit to days input) by setting the attribute:

InputMode="DatePicker"

So, basically, if CustomResizeBehavior|CustomDragDropBehavior is turned on, I would like the resizing or dragging of a gantt task to lock to days, and not fall to times in between days. Is there any way to accomplish this behavior?

GanttView

answered on 03 Jul 2012

0 answers

187 views

Tab Key Issue when input Mode = TimePicker

I'm seeing the following behavior with the DateTimePicker when InputMode=TimePicker.

With cursor in textbox, hit down arrow to open time picker popup.
Then hit tab key to move focus to list of selectable times
Keep hitting tab until focus is on the time you would like to select
Hit enter. Popup closes but time was NOT selected. Appears that only a mouse click will select a time. Is there a setting that will enable selecting a time with the keyboard?

Also,

With cursor in textbox, hit down arrow to open time picker popup.
Then hit tab key to move focus to list of selectable times
Keep hitting tab until focus is on the time you would like to select
Hit enter and popup closes.
Hit down arrow to open time picker.
Hit tab key to move focus to a selectable time. Focus does not move to list of times. How can I get the focus back into the popup to select a time with the keyboard?

Thanks in advance!

DateTimePicker

asked on 03 Jul 2012

1 answer

155 views

Drag Copy of Appointment to ListView

Hi

I would like to drag-and-drop an Appointment from ScheduleView to a ListView. The (visual) effect should be that it drags a copy of it, leaving the item in ScheduleView intact. I've followed the example for ScheduleView Drag-and-Drop, and everything works except the item being removed from ScheduleView. How do you recommend I go about this?
--
Sincerely,
Christian

ScheduleView

answered on 03 Jul 2012