Questions on UI for WPF Forum

3 answers

204 views

Hi,

I have a problem in a Grid, editing a new row previously entered.

The sequence is this :

1. First I insert a new row.

The code in AddingNewDataItem Event Handler of the Grid is :

public void EUGruppoGrid_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e)

{

if (e.Cancel) return;

String TipoCurrentItem;

GridViewDataControl GridViewDataControl = e.OwnerGridViewItemsControl;

if (GridViewDataControl.CurrentItem != null)

TipoCurrentItem = ((EUGruppoVO)GridViewDataControl.CurrentItem).Tipo;

else

TipoCurrentItem = " ";

e.NewObject = new EUGruppoVO(0, "", TipoCurrentItem);

}

the "EUGruppoVO" Constructor is :

public EUGruppoVO(Int32 id, String descrizione, String tipo)

{

this._id = id; // in the database the fields is a identity primary key

this._descrizione = descrizione;

this._tipo = tipo;

}

the "EUGruppoVO" implements "INotifyPropertyChanged"

the "EUGruppoItemsSource" is an instance of : "public class EUGruppoVOList : ObservableCollection<EUGruppoVO>"

2. Then I move to another row ( the RowEditEnded Event fire with "e.EditOperationType == GridViewEditOperationType.Insert" )The code in RowEditEnded Event Handler of the Grid is :

public void EUGruppoGrid_RowEditEnded(object sender, Telerik.Windows.Controls.GridViewRowEditEndedEventArgs e){if (e.EditAction == GridViewEditAction.Cancel) return;if (e.EditOperationType == GridViewEditOperationType.Insert)_eUGruppoService.Insert((EUGruppoVO)e.NewData);else_eUGruppoService.Update((EUGruppoVO)e.NewData);}

3. Then I move in the row previously entered, strangely the value of the "id" property of the current item has remained zero.I edit the row, when I move to another row the RowEditEnded Event fire again with "e.EditOperationType == GridViewEditOperationType.Update"but the "id" property of (EUGruppoVO)e.NewData is still zero, why ?

An extract of the XAML code is :...<telerikGridView:RadGridView x:Name="EUGruppoGrid" AutoGenerateColumns="False" CanUserFreezeColumns="False" ShowGroupPanel="True" ItemsSource="{Binding EUGruppoItemsSource, Mode=TwoWay}" CurrentItem="{Binding EUGruppoCurrentItem, Mode=TwoWay}" Margin="0,0,0,0"><telerikGridView:RadGridView.Columns><telerikGridView:GridViewComboBoxColumn DataMemberBinding="{Binding Tipo, Mode=TwoWay}" ItemsSource="{Binding TipoEUList, Mode=OneWay}" DisplayMemberPath="Descrizione" SelectedValueMemberPath="Codice" Header="Tipo" IsReadOnly="False" /><telerikGridView:GridViewDataColumn DataMemberBinding="{Binding Descrizione, Mode=TwoWay}" Header="Descrizione" IsReadOnly="False" /><telerikGridView:GridViewDataColumn IsVisible="False" DataMemberBinding="{Binding Id, Mode=OneWay}" Header="Id" IsReadOnly="True" /></telerikGridView:RadGridView.Columns></telerikGridView:RadGridView>...

An extract of the code behind is :...this.EUGruppoGrid.AddingNewDataItem += new EventHandler<Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs>(_tabelleViewModel.Controller.EUGruppoGrid_AddingNewDataItem);this.EUGruppoGrid.RowEditEnded += new EventHandler<Telerik.Windows.Controls.GridViewRowEditEndedEventArgs>(_tabelleViewModel.Controller.EUGruppoGrid_RowEditEnded);...DataContext = _tabelleViewModel

Thanks, Dario.

GridView

answered on 09 Apr 2010

2 answers

100 views

Binding To Collection from example not working

Hello! I was trying to get advantage from the RadTabControl component in my project and have it bounded to a collection I am going to use. I follow all the steps in the documentation, but in the end the tab names are still the name of the class and not some property string I want to use. I even made a project using your own classes (Person & ViewModel) thinking that something is wrong with my code and I still see "DataInfo.Person" at the name of each tab (DataInfo is my namespace)

I am using exactly your code:

                    namespace DataInfo {         
                public class Person {         
                    public Person( string name, int age ) {         
                        this.Name = name;         
                        this.Age = age;         
                    }         
                    public string Name {         
                        get;         
                        set;         
                    }         
                    public int Age {         
                        get;         
                        set;         
                    }         
                }         
            }         

                    namespace DataInfo {         
                public class ViewModel {         
                    public ViewModel() {         
                        this.Persons = new ObservableCollection<Person>();         
                        this.Persons.Add( new Person( "Ivan", 23 ) );         
                        this.Persons.Add( new Person( "Stefan", 34 ) );         
                        this.Persons.Add( new Person( "Maria", 16 ) );         
                        this.Persons.Add( new Person( "Michael", 78 ) );         
                    }         
                    public ObservableCollection<Person> Persons {         
                        get;         
                        set;         
                    }         
                }         
            }         

                    <UserControl x:Class="DataInfo.TabControl"         
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         
                         xmlns:DataInfo="clr-namespace:DataInfo"         
                         xmlns:Controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation">         
                <UserControl.Resources>         
                    <DataInfo:ViewModel x:Key="DataSource" />         
                    <DataTemplate x:Key="ContentTemplate">         
                        <Grid>         
                            <TextBlock Text="{Binding Age}" />         
                        </Grid>         
                    </DataTemplate>         
                </UserControl.Resources>         
                <Grid x:Name="LayoutRoot"         
                      Background="White">         
                    <Controls:RadTabControl x:Name="radTabControl"         
                                            Margin="8"         
                                            ItemsSource="{Binding Source={StaticResource DataSource}, Path=Persons}"         
                                            DisplayMemberPath="Name"         
                                            ContentTemplate="{StaticResource ContentTemplate}" />         
                     
                </Grid>         
            </UserControl>         

Is there something I've misunderstood?

Thank you!

Roxana

TabControl

answered on 09 Apr 2010

1 answer

142 views

Custom Control Context Menus an panes

Hi,

I place several Custom Controls on panes. After that I'm not able to show the controls COntext Menu -instead I only get the panes Context Menu. I tried to disable the pane's context menu - but then I do not get any context menu.

How do I solve my problem ?

kind regards

Lorenz

Docking

answered on 08 Apr 2010

1 answer

106 views

GridView filter drag and drop problem

Hi,

I have such a problem:

I've got a RadGridView (WPF). Filtering is enabled for columns. When I want to use vertical scrollbar on the filter (or just trying to drag filter control), grid behaves like it drag the column. This behavior is the same on Telerik demos. How to prevent this?

GridView

answered on 08 Apr 2010

2 answers

178 views

RadTileView question

Hello,

I have been working with the radTileView. It's going to do what I need it to do in most cases. However, when there are only a few items the RadTileViewItems take the full space proportionally. It doesn't matter if I set the TileState="Minimized" or TileState="Restored" and the RadFluidContentControl ContentChangeMode="Manual" and State="Small". The controls do appear in the proper state, however the border of the control takes the remaining space causing the controls to be spaced evenly in the area. Even if I manually set the maxHeight and maxWidth of the radTileViewItem.

Is there a way to cause the tiles to be top left justified and leave blank space to the bottom and right when minimized or restored?

The other thing is that when I have a radTileView item maximized and the minimizedItemsPosition="Right" the same kind of spacing issue occurs. I would like them to appear like they do in the "Tile States" BMW section of this link - http://www.telerik.com/products/silverlight/tileview.aspx

I have also tried this with the sample code by adjusting the number of BMW tileViewItems and the size of their container.

I would like to use it more like a list box with very small items taking advantage of the eye candy moving them around and the maximize to edit the information in the control.

Thank you for your help.

Rick

TileView

answered on 08 Apr 2010

1 answer

62 views

where has columnwidthsmode gone??

Hi,
I've just updated my WPF binaries to 2010.1.309.35 from 2009.3.1208.35 and it seems that the ColumnWidthsMode enum is missing could someone please explain to me what has happened to it?

Also, I've seen examples using the telerik:HierarchicalDataTemplate with the treeview control with regards to binding to the individual items CheckState property but can't seem to find that class either. Please help asap as this is rather urgent.

Thanks,
Peter.

GridView

answered on 08 Apr 2010

1 answer

91 views

Installation of VS2010 and using Telerik RadControls with it

Hi,
What are general rules for installation Visual Studio 2010 and using Telerik RadControls with it, in case if VS2008 and Telerik RadControls already installed on this machine?
Should Telerik RadControls be reinstalled after installation of VS2010?

General Discussions

answered on 08 Apr 2010

17 answers

561 views

WPF Radgridview heirarchichical Binding from Dataset

Cheers to Telerik,

I've just started using the telerik WPF and started with radgridview only.

Am using a Dataset to populate the Grid.This is not a typed dataset, but a dataset generated programmatically from a SQLServer 2005 DB.Am using VB.net 3.5 as well.To populate the Dataset am using a StoredProcedure

I was able to populate the grid using my dataset.Now I want to make a child for that grid with another dataset and the dataset uses another SP.So how can I attain this.I tried for help but majority is using LINQ.Am not much aware of LINQ.

Please find my code below.( I havent tried with the hierarchy here)

XAML

    
            <Window x:Class="Window1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                Title="Window1" Height="515" Width="933" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"> 
        
                <Grid> 
        
                    <telerik:RadGridView Margin="0,-12,22,163" Name="RGVW" AutoGenerateColumns="False"  ItemsSource="{Binding}" AlternateRowBackground="Bisque"> 
        
                        <telerik:RadGridView.Columns> 
        
                            <telerik:GridViewDataColumn  Name="CDNO" UniqueName="CDNO" Header="CDNO"  /> 
        
                            <telerik:GridViewDataColumn Name="Truck" UniqueName="Truck No" Header="Truck No"  /> 
        
                            <telerik:GridViewDataColumn Name="Status" UniqueName="Status" Header="Status"  /> 
        
                            <telerik:GridViewImageColumn Name="Flag" UniqueName="Flag" Header="Truck Flag"  /> 
        
                        </telerik:RadGridView.Columns> 
        
                    </telerik:RadGridView> 
        
                </Grid> 
        
            </Window>

VBCode (VS2008)

    
            Private Sub Window1_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded 
        
                    Dim ds As DataSet 
        
                    Dim dbConn As String = "Data Source=SQLSERVER;Initial Catalog=DB;_
        
            Persist Security Info=True;User ID=!@#;pwd=!@#" 
        
                    ds = DBA.ExecuteDataset(dbConn, "SP_DockForWPF") 
        
                    RGVW.DataContext = ds 
        
                End Sub

Here the uniquenames am using is the field from the SP.
To connect to the DB am using, the Microsoft.StandardLib.DBAccess dll. (DBA is the instance of this DLL

I got a sample in C# from the following post http://www.telerik.com/ClientsFiles/164971_hierarchywithdataset.zip .Its the one which uses LINQ

Many thanks in advance

Renju

GridView

answered on 08 Apr 2010

5 answers

125 views

TreeView calls CollecectionChanged event on Drag&Drop

So the structure of my tree is something like:

RootObject

ChildObject1

GrandChildObject1

ChildObject2

GrandChildObject2

Problem 1: When I drag and drop GrandChildObject1 to ChildObject2, the collection in ChildObject1 calls its Delete method, and I don't want that, since there's a few steps I need to do before removing GrandChildObject1 from ChildObject1.

Problem 2: When I drop GrandChildObject1 into ChildObject2, there's a few steps I need to do before finally adding GrandChildObject1 to ChildObject2. So doing this, also triggers the Add Method, so I end up having two children of the same item (one added by the TreeView itself, and one I add with my own method in the TreeView.RadTreeView_DragEnded event).

So, is there a way to prevent the TreeView from handling this, and not losing the little Drag&Drop preview when the drag starts? I just want to disable the TreeView from triggering a change in the Collection. I found out it was doing it by setting a breakpoint here:

                    private void GrandChildren_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)         
            {         
                this.NotifyPropertyChanged("GrandChildren"); // breakpoint here        
            }         

EDIT: The collection of GrandChildren is an ObservableCollection<T>, and I can't change that to BindingList<T> or List<T>

Thanks!

TreeView

answered on 08 Apr 2010

2 answers

217 views

GridViewCell Background color binding issue

Hello,

I would like to bind cell background color to cell value (via converter of course). However when I declare style in GridViewResource like this:

    
            <Style TargetType="{x:Type telerik:GridViewCell}"> 
        
              <Setter Property="Background"> 
        
                <Setter.Value> 
        
                  <SolidColorBrush Color="{Binding Converter={StaticResource decimalToColor}}" /> 
        
                </Setter.Value> 
        
               </Setter> 
        
            </Style>

which simply should return Brushes.Red.Color for value < 0 Green for value > 0 and left color White when value is equal to 0. In debug mode I discovered that value passed to value converter is eqal to whole object (I'm binding ItemSource to collection of custom business objects) instead of being equal to object property value which is binded to column.

When I try to do something like this:

    
            <telerik:GridViewDataColumn Width="45" DataType="{x:Type sys:Decimal}" Header="H1" DataMemberBinding="{Binding Path=H1, Mode=TwoWay}" DataFormatString="{}{0:n0}" IsGroupable="False" IsSortable="False" IsFilterable="False"> 
        
              <telerik:GridViewColumn.CellStyle> 
        
                 <Style TargetType="{x:Type telerik:GridViewCell}"> 
        
                   <Setter Property="Background"> 
        
                     <Setter.Value> 
        
                       <SolidColorBrush Color="{Binding Converter={StaticResource cellBGConverter}}" /> 

                     </Setter.Value> 
        
                   </Setter> 
        
                </Style> 
        
              </telerik:GridViewColumn.CellStyle> 
        
            </telerik:GridViewDataColumn>

it's even working, color is changed (value converter gets cell value), but I get an error:

"System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=H1; DataItem='DailyPosition' (HashCode=7712694); target element is 'SolidColorBrush' (HashCode=16353339); target property is 'Color' (type 'Color')
"
which cause low performance :(
Any ideas? How to get cell value in first style declaration?

Thanks in advance,
MC

GridView

answered on 08 Apr 2010