Questions on UI for WPF Forum

0 answers

44 views

XamlParseException after uprading from Q2 2010 to Q1 2012

After I upgraded the Telerik controls from Q2 2010 to Q1 2012 I get XAmlParse Exception when I try to run my application.
What could be the issue?

General Discussions

asked on 13 Jun 2012

1 answer

146 views

Add Record NullReferenceException

Hi

I am trying to add a new record to a grid using the inbuilt ShowInsertRow. When I add the record I get binding errors and an exception A first chance exception of type 'System.NullReferenceException' occurred in Telerik.Windows.Data.dll

If I continue through the errors it adds the record to the grid correctly.

The grid is bound to a ObservableCollection in the view model

<telerik:RadGridView Grid.Row="2" x:Name="SpatialDataLocations"

ItemsSource="{Binding SpatialDataLocations}"

ShowGroupPanel="False"

ShowInsertRow="True"

IsSynchronizedWithCurrentItem="True"

VerticalAlignment="Stretch"

HorizontalAlignment="Stretch"

AutoGenerateColumns="False"

CanUserInsertRows="True">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Name"

DataMemberBinding="{Binding Name, Mode=TwoWay}" />

<telerik:GridViewDataColumn Header="Path"

DataMemberBinding="{Binding Path, Mode=TwoWay}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

I get two exceptions one for each column. The Call Stack Location is Telerik.Windows.Data.ObjectDataBinder.GetValue(Object bindingSource, stringPropertyPath)

The binding source is null, is this the problem? If so how do I deal with this?

Thanks for you help

Regards

Murray

GridView

answered on 13 Jun 2012

0 answers

107 views

Adding an aggregate function to numeric columns

Hi,
I have a generic grid which takes the source from a stored procedure. I like to add an aggregate function for numeric columns only. How do I do that? A combobox column could have a numeric values in its underlying data which I don't want.

Any ideas would be appreciated.

GridView

asked on 13 Jun 2012

2 answers

208 views

Edit Cell with Changes in ViewModel

Hi,

I have a RadGridView that has several columns with readonly set to false (ie. these can be edited). Predictably, when I edit a particular cell, the changes are changed in the relevant row in my Collection in my viewmodel when the user presses enter or clicks somewhere else.

When a change is made, I update my database.There is one or two checks I make and then the database update call itself could throw an exception so I also have a catch that reverts the values back to the original values (using e.OldValues).

Currently, similar to the example provided by Veselin in this thread, I use the RowEditEnded event handler. However, I would like to have all this logic in my ViewModel. What are my options? Do I have any? Ofcourse examples are a big help.

Thanks

GridView

answered on 12 Jun 2012

0 answers

141 views

Virtualization Issues

Hi telerk,

I have a table Customers which has 80000 records and my project use a grid to show them(not use Datapager). It can be showed correctly, but it load all data into memory and takes about 150 MB! I heard that RadGridView support data virtualization if its container like grid which have a fixed height. I make a sample project to verify this, but it still loaded all data and take amount memory.
How I can do this? Because I can not open the UIVirtulization sample on your WPF samples, Could you send me a sample project for this? Thanks very much
this is MainWindow code:

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="500"/>

<RowDefinition Height="50" />

</Grid.RowDefinitions>

<telerik:RadGridView ItemsSource="{Binding MyCollection}" AutoGenerateColumns="False"

>

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="CustommerNumber" DataMemberBinding="{Binding CustomerNumber}" IsGroupable="False" IsFilterable="False" />

<telerik:GridViewDataColumn Header="CompanyName" DataMemberBinding="{Binding CompanyName}" IsSortable="False" />

<telerik:GridViewDataColumn Header="Address" DataMemberBinding="{Binding Address}" />

<telerik:GridViewDataColumn Header="PoBox" DataMemberBinding="{Binding POBox}" />

<telerik:GridViewDataColumn Header="PostalCode" DataMemberBinding="{Binding PostalCode}" />

<telerik:GridViewDataColumn Header="ContactName" DataMemberBinding="{Binding ContactName}" />

<telerik:GridViewDataColumn Header="Phone" DataMemberBinding="{Binding Phone}" />

<telerik:GridViewDataColumn Header="Fax" DataMemberBinding="{Binding Fax}" />

<telerik:GridViewDataColumn Header="Country" DataMemberBinding="{Binding Country}" />

<telerik:GridViewDataColumn Header="Mobile" DataMemberBinding="{Binding Mobile}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

<ScrollViewer x:Name="LogScrollViewer" VerticalAlignment="Stretch" Grid.Row="1" >

<TextBox x:Name="tbMemory" Width="200" Height="30"></TextBox>

</ScrollViewer>

</Grid>

public MainWindow()

{

//MessageBox.Show("loading main window");

InitializeComponent();

DispatcherTimer timer = new DispatcherTimer();

timer.Interval = new TimeSpan(0, 0, 1);

timer.Tick += timer_Tick;

timer.Start();

//MessageBox.Show("2");

this.DataContext = new MyViewModel();

}

this is MyViewModel code:

class MyViewModel : INotifyPropertyChanged

{

#region INotifyPropertyChanged Members

public event PropertyChangedEventHandler PropertyChanged;

protected void OnPropertyChanged(string propertyName)

{

PropertyChangedEventHandler handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

#endregion

private RXOfficeEntities context = null;

private ObservableCollection<Customer> _MyCollection = null;

public ObservableCollection<Customer> MyCollection

{

get { return _MyCollection; }

set { _MyCollection = value; OnPropertyChanged("MyCollection"); }

}

public MyViewModel()

{

context = new RXOfficeEntities();

MyCollection = new ObservableCollection<Customer>(context.Customers);

}

GridView

asked on 12 Jun 2012

6 answers

80 views

RadListBox missing in 2011 Q3

Hi there,

RadListBox is missing in 2011 Q3 , how to get it as i required to use it or is there any alternative of it.

ListBox

answered on 12 Jun 2012

2 answers

184 views

Modify the OpenCommand

Hello!

I have an ImageEditor with custom UI and everything is working great, I just want to change some functionality of the Open button. When the user clicks on it, the OpenFileDialog open but the pre-defined file type is *.PNG and every time he need's to change it to .JPG.

Is there a way to override the OpenCommand and change the default file type of the Dialog window?

Here's the code of the button:

<telerik:RadImageEditorButton Grid.Column="0"

Image="/Telerik.Windows.Controls.ImageEditor;Component/Images/open.png"

Command="{Binding Commands.Open, ElementName=imageEditor}" />

Thanks!

ImageEditor

answered on 12 Jun 2012

1 answer

120 views

Release notes for the latest WPF release?

Is there a plan to update the release notes? Am I just looking in the wrong place?

http://www.telerik.com/versionnotes.aspx?id=2843

Greg

General Discussions

answered on 12 Jun 2012

5 answers

202 views

Translation problem

Hi,

I.m using WPF and Telerik 2012.1.326.35 and I remark a translation problem with the RadDatePicker. All my environment is in french but when I manually enter a wrong date in the control, a tooltip appear in english with the word "Error".

How I can fix this???

Thank's

DatePicker

answered on 12 Jun 2012

3 answers

137 views

How to register my custom IRoutingService

Looking through the code of the 2012 Q2 release it appears if I can register my own IRoutingService I would be able to control the lines drawn for my connections.

First is that true statement? And if so is there a sample on how to do that?

Thanks
Donovan

Diagram

answered on 12 Jun 2012