Questions on UI for WPF Forum

4 answers

163 views

Documentation

Where is the documentation for how to build expressions in the editor?

the functions that I need are not working properly or I'm using it in a wrong way

ExpressionEditor

answered on 28 Jun 2011

2 answers

231 views

ArgumentNullException in DataItemAutomationPeer

Hy,

When moving our application window or resizing it then we get an ArgumentNullException in the DataItemAutomationPeer class.

We are currently on the binaries RadControls for WPF Q1 2011.
I looked at the currently available source code "01348RadControls_for_WPF_40_2011_1_0613_DEV_hotfix".

Callstack on Exception:
  Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.DataItemAutomationPeer.DataItemAutomationPeer(object dataItem, Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer dataControlAutomationPeer) Line 78 C#
> Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.GridViewDataItemAutomationPeer.GridViewDataItemAutomationPeer(object dataItem, Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer dataControlAutomationPeer) Line 25 C#
  Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.RadGridViewAutomationPeer.CreateDataItemAutomationPeer(object dataItem) Line 97 + 0x2f bytes C#
  Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer.GeneratePeersForDataItems(System.Collections.Generic.List<System.Windows.Automation.Peers.AutomationPeer> newPeerList, Telerik.Windows.Controls.GridView.Automation.AutomationPeerStorage<object,Telerik.Windows.Controls.GridView.Automation.DataItemAutomationPeer> oldCachedPeers) Line 111 + 0x1c bytes C#
  Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.GridViewDataControlAutomationPeer.GetItemPeers() Line 101 C#
  Telerik.Windows.Controls.GridView.dll!Telerik.Windows.Controls.GridView.Automation.GridViewVirtualizingPanelAutomationPeer.GetChildrenCore() Line 79 + 0x21 bytes C#

What I saw in the source is:

In class GridViewDataControlAutomationPeer a check is done for (dataitem == null), see below:

        private void GeneratePeersForDataItems(List<AutomationPeer> newPeerList, AutomationPeerStorage<object, DataItemAutomationPeer> oldCachedPeers)
        {
            foreach (object dataItem in this.Items)
            {
                DataItemAutomationPeer dataItemPeer = oldCachedPeers.FindPeer(dataItem);

if (dataItemPeer == null)
dataItemPeer = this.CreateDataItemAutomationPeer(dataItem);

SetUpOwnerRowEventsSource(dataItemPeer);

                this.cachedPeers[dataItem] = dataItemPeer;
                newPeerList.Add(dataItemPeer);
            }
        }

Then later in the ctor of DataItemAutomationPeer I saw the following code:
        protected DataItemAutomationPeer(object dataItem, GridViewDataControlAutomationPeer dataControlAutomationPeer)
            : base(dataControlAutomationPeer.OwnerGridViewDataControl)
        {
            if (dataItem == null)
                throw new ArgumentNullException("dataItem");
            if (dataControlAutomationPeer == null)
                throw new ArgumentNullException("dataControlAutomationPeer");

            this.dataItem = dataItem;
            this.dataControlAutomationPeer = dataControlAutomationPeer;
        }

In my case I get the exception from this check in the ctor.

Kind regards,
Yvonne

GridView

answered on 28 Jun 2011

3 answers

224 views

Filter Icon on RadDataGridView column Header

Hi,

I was trying to apply filter on DataGridView column(IsFilterable =True). But not able to show icon on column header. My column is bounded with ObservalCollection<MyType> and a am showing values in a Listbox.

Is it possible to show filtering on collection type column, also i want to show custom control(FilterControl) when user click on filter icon.
For example suppose my RadGridView bounded to a collection "ClaimList"
Collection ClaimList includes:
- Claim Number(int)
- Vehicle(String)
- Contact(String)
- Inspection date(DateTime)
- Next Actions (ObservalCollection<IClaimActions>)

The problem is with column Next Action which shows a list of possible actions on a particular Claim Number.

Thanks,
Umesh Kumar

General Discussions

answered on 28 Jun 2011

3 answers

68 views

Server error when trying to see my post

Hi,
There is a problem with the forum's server when i try to acces to my post at http://www.telerik.com/community/forums/wpf/gridview/invalidoperationexception-when-group-sort-one-of-the-two-grids-binded-on-one-listcollectionview.aspx :

GridView

answered on 28 Jun 2011

1 answer

309 views

WPF demo not running under Chrome

I have a Dell laptop running Windows 7 and Chrome 12.0 (most current version). Here's what happens when I try to run the WPF demo:

1) I click "Click to Open" on the demo webpage
2) The XBAP downloads to my Downloads folder.
3) Chrome displays "This type of file can harm your computer. Are you sure you want to download Telerik...amples.xbap?" on the downloads bar at the bottom of the Chrome window, with "Save" and "Discard" buttons.
4) I click "Save".
5) Return to step 2.

I stopped after I had 6 copies of the XBAP.

The demo runs on IE9 on the same laptop. I would love to run the demo on Chrome, which appears to significantly faster on my laptop.

General Discussions

answered on 28 Jun 2011

1 answer

108 views

BeginInsert does not seem to be working

I am setting the itemsource of my radgridview using the code
WireInstructionDGV.ItemsSource = obj.GetWireInstruction("BNYBD", "MST", "CPTY", "USD")

To add a new row, i have a button who's click event has
Me.WireInstructionDGV.BeginInsert()

Clicking on the button does not add a new row in the datagrid. any ideas ?

(I do not have IsReadOnly = True or CanUserInsertRows = False)

GridView

answered on 27 Jun 2011

7 answers

277 views

Binding to Grid with Entity Framework 4.1 Codefirst

Hello all.

I have updated my Entity Framework 4.0 to 4.1Since i have a problem with the binding to Radgridview control.

My Dataclasses as sample:

namespace KfzOrtung6DataClasses.Modells

{

public class Fahrzeuge

{

public Fahrzeuge()

{

this.FahrzeugPositionen = new ObservableCollection<Positionen>();

}

[Required]

[Key]

[DatabaseGenerated(DatabaseGeneratedOption.None)]

public Guid ID { get; set; }

[Required]

[MaxLength(50)]

public string Name { get; set; }

[Required]

[MaxLength(50)]

public string Kennzeichen { get; set; }

public string Rufnummer { get; set; }

public int Aktiv { get; set; }

public DateTime Ablaufsimkarte { get; set; }

[MaxLength(4000)]

public string Bemerkung { get; set; }

public virtual ObservableCollection<Positionen> FahrzeugPositionen { get; private set; }

}

In my UC i have into the Loaded-Event:

this.DataContext = this.ItemsSource;

The Collectionview Method:

ICollectionView _itemsSource;

public ICollectionView ItemsSource

{

get

{

if (_itemsSource == null)

{

using (var ktt = new KfzContext6())

{

ktt.MFahrzeuge.Load();

var c = ktt.MFahrzeuge.Local.ToBindingList();

var collectionViewSource = new CollectionViewSource {Source = c};

_itemsSource = collectionViewSource.View;

}

return _itemsSource;

}

set

{

_itemsSource = value;

OnPropertyChanged("ItemsSource");

}

#endregion

In my context class:

namespace KfzOrtung6DataClasses.Modells

{

public class KfzContext6 : DbContext

{

public KfzContext6(): base("KfzContext6")

{

}

public DbSet<Fahrzeuge> MFahrzeuge { get; set; }

public DbSet<Positionen> MPositionen { get; set; }

public DbSet<Tarife> MTarife { get; set; }

public DbSet<Benutzer> MBenutzer { get; set; }

public DbSet<SmsProtokoll> MSmsProtokoll { get; set; }

protected override void OnModelCreating(DbModelBuilder modelBuilder)

{

base.OnModelCreating(modelBuilder);

// Hier können manuelle Änderungen an Datenbank vorgenommen werden!!

//Beispiel:

//modelBuilder.Entity<Benutzer>().Property(r => r.ID).HasColumnName("Id");

}

My save method:

selectedFahrzeugAusListe.Aktiv = chkFahrzeugAktiv.IsChecked == true ? 1 : 0;

selectedFahrzeugAusListe.Rufnummer = txFahrzeugGpsnummer.Text.Trim();

selectedFahrzeugAusListe.Kennzeichen = txFahrzeugKennzeichen.Text.Trim();

selectedFahrzeugAusListe.Bemerkung = txFahrzeugKommentar.Text.Trim();

selectedFahrzeugAusListe.Name = txFahrzeugName.Text.Trim();

selectedFahrzeugAusListe.Ablaufsimkarte = dateTimePicker.DisplayDate;

using (var ktt = new KfzContext6())

{

ktt.MFahrzeuge.Add(selectedFahrzeugAusListe);

ktt.SaveChanges();

ItemsSource.Refresh();

}

In xaml of the radgridview:

<telerik:RadGridView AutoGenerateColumns="False"

CanUserFreezeColumns="False"

CanUserResizeColumns="True"

Margin="10,6,10,13"

x:Name="FahrzeugGrid"

RowIndicatorVisibility="Visible"

AutoExpandGroups="True"

IsFilteringAllowed="False"

ShowGroupPanel="False"

ShowGroupFooters="False"

IsReadOnly="True"

SelectionChanged="FahrzeugGrid_SelectionChanged"

ActionOnLostFocus="None"

AreRowDetailsFrozen="True"

CanUserInsertRows="False"

CanUserDeleteRows="False"

RowDetailsVisibilityMode="Visible" Grid.Row="1"

ItemsSource="{Binding ItemsSource, ElementName=DataSourceChangeNotificationsFahrzeugControl}"

DataLoaded="FahrzeugGrid_DataLoaded" >

<telerik:RadGridView.ParentRow>

<telerik:GridViewRow IsTabStop="False" />

</telerik:RadGridView.ParentRow>

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Name}"

Header="Fahrzeugname" Width="200" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Kennzeichen}"

Header="Kennzeichen" Width="140" />

<telerik:GridViewColumn Header="Aktiv" Width="40" IsFilterable="True">

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<CheckBox IsEnabled="False"

IsChecked="{Binding Path=Aktiv, Converter={StaticResource CopnvertIntToBool1} }">

</CheckBox>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewColumn>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Rufnummer}"

Header="GPS Nummer" Width="150" />

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Ablaufsimkarte}"

Header="Ablauf Karte" Width="90" />

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Bemerkung}"

Header="Kommentar" Width="*" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

It shows all cars, but when i save a new car, the list doesn´t refresh.
When i reload the UC, then all cars (the new one too) are all there.

Can you please help?

Reinhard

GridView

answered on 27 Jun 2011

2 answers

115 views

Invalid Type on Transition Easing

On the QuarticEase below, I am getting an "Invalid Type" Error.  

Any Easing function I try to enter gives me the same Invalid Type error. Help please!

Visual Studio 2010 w/ .Net 4 with RadControls for WPF 2011_1_0419.



<

Grid x:Name="MainGrid" Background="{StaticResource HelpBrush}">

<telerik:RadTransitionControl x:Name="TransControl" Width="484" Height="384" Duration="0:0:1"

Padding="32">

<telerik:RadTransitionControl.Transition>

<telerik:PerspectiveRotationTransition Direction="Left">

</telerik:PerspectiveRotationTransition>

</telerik:RadTransitionControl.Transition>

<telerik:RadTransitionControl.Easing>

<QuarticEase EasingMode="EaseOut"/>

</telerik:RadTransitionControl.Easing>

</telerik:RadTransitionControl>

</

Grid

TransitionControl

answered on 27 Jun 2011

5 answers

131 views

RadDocking looping thru the radpanes

Hey

We use telerik:RadDocking - telerik:RadSplitContainer - Radpanes. it is dockedbottom. Mouse over minimized docked panes, looping sometimes (it tries to show the panes in a loop). We don't have lot of coding going on related to raddocking.

Do you have any solution to this or do you have any similar posts?

I am trying figure out a work around.

Thanks
Ram

Docking