Questions on UI for WPF Forum

1 answer

295 views

This is my code:
<telerik:RadComboBox Height="30" HorizontalAlignment="Left" Margin="126,63,0,0" Name="RadComboBox1" VerticalAlignment="Top" Width="262">
   <telerik:RadComboBoxItem Content="Item 1" />
   <telerik:RadComboBoxItem Content="Item 2" Visibility="Collapsed"/>
   <telerik:RadComboBoxItem Content="Item 3" />
   </telerik:RadComboBox>
But Item 2 not collapse.

Thanks,

ComboBox

answered on 17 Mar 2011

3 answers

217 views

Expanding databound tree items

I have a completely dynamic RadTreeView that users can add items to. To add a child item, the user selects an existing item and presses a button to generate a new item under the currently selected item. All of that works fine, but the parent item doesn't expand to show the newly added item. I'm trying to get this to happen so that the user doesn't have to manually expand the parent after adding a child.

This project is using MVVM and the tree items are all databound to an ObservableCollection of a custom class located in my View-Model. The currently selected item is also databound to a property in my View-Model that is of the same custom class as the ObservableCollection.

Since I'm adding the new items to my tree through the databound property in the View-Model, I can't simply tell the parent to expand from there because it has no access to the UI elements. Immediately after I create the new item I set it in the View-Model as the currently selected item. I figure this will trigger the SelectionChanged event on the RadTreeView (which it does) so my idea is to try and expand the parent of the currently selected item from there.

The problem there is that I can't get anything working properly in the SelectionChanged event.

The "SelectionChangedEventArgs" Source property only gives me an object of the custom class type. Obviously that doesn't allow me to change the IsExpanded property. Whenever I try to cast the Source property as a RadTreeViewItem it always returns null. Similarly I have also tried iterating through the RadTreeView itself, but that does the same thing. I can easily get the object of the custom class from the View-Model, but nothing I try gives me the RadTreeViewItem for me to expand.

I've messed around with the GetItemByPath and ExpandItemByPath methods, but it is completely possible for items in my tree to have the exact same name. In that case, how would those methods know which path is the right path? I don't think those will work for me.

I have also tried the code here, specifically this:

private void radTreeView_SelectionChanged( object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e )

{

// Get a reference to the treeview

Telerik.Windows.Controls.RadTreeView treeView = sender as Telerik.Windows.Controls.RadTreeView;

// Get the currently selected items

ObservableCollection<Object> selectedItems = treeView.SelectedItems;

RadTreeViewItem item = selectedItems[ 0 ] as RadTreeViewItem;

}

However, as I mentioned before, "item" is always coming out null. If I instead cast it to my custom class, item holds the correct data and I can get the parent item, but is not a RadTreeViewItem for me to expand.

Thanks in advance for any help...

TreeView

answered on 17 Mar 2011

1 answer

111 views

IEnumerable Datasource Error

Hi,

We're just implementing Telerik controls in our WPF (PRISM) application and having some problems with the DataFilter control.
We have a radgrid and can bind the control to the grid and filter without any problems. However, the requirement is display 3 filterable fields when the screen loads and for only 3 fields out of a possible 8 of the grid view.

So we're trying to go down the FilterDescriptions route and define our 3 filters programatically

                var companyFilter = new FilterDescriptor("Receiver Company", FilterOperator.Contains, "", true);

radDataFilter.FilterDescriptors.Add(companyFilter);

var addressFilter = new FilterDescriptor("Address Line 1", FilterOperator.Contains, "", true);

radDataFilter.FilterDescriptors.Add(addressFilter);

//// DateTime filter.

var dateFilter = new FilterDescriptor("Created Date", FilterOperator.IsGreaterThan,

new DateTime(2007, 5, 1));

radDataFilter.FilterDescriptors.Add(dateFilter);

However when we do this it throws an error saying the source isn't IEnumerable. The source in this instance is defined in the XAML as the radgrid, which has loaded an IList<Receiver> object, which last time I checked was IEnumerable.

Even if I set the Datasource programatically to a List<Receiver> still get the same error.

I'm not sure where to turn and thinking maybe Data annotations are an option.

Any views?

Thanks.

DataFilter

answered on 17 Mar 2011

3 answers

373 views

Radcombo box selected index?

Hello Telerik Team,
I have one clarification in my latest WPF project.Here I am having one radcombo box.Its contains 3 values.

<telerik:RadComboBox HorizontalAlignment="Left" SelectedIndex="{Binding xx}" Margin="114,207,0,0" Name="radComboBox2" VerticalAlignment="Top" Width="205">

<telerik:RadComboBoxItem Content="Item 1" />

<telerik:RadComboBoxItem Content="Item 2" />

<telerik:RadComboBoxItem Content="Item 3" />

</telerik:RadComboBox>

When window loading time i want to display item3 in radcombobox.After window loading client can change the value and storing into database.
So i am binding into selectedindex in XAML.
codebehind sample

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

this.radComboBox2.SelectedIndex = 2;

}

But it display empty Combobox?
why?
pls give me any suggestions

ComboBox

answered on 17 Mar 2011

2 answers

84 views

Parser: tweak the century

When entering a date in the RadDatePicker, where the century is not specified (e.g. 6/20/76), is there a way to instruct the parser to deliver 1976 instead of 2076, short of reimplementing it?
Even if SelectableDateEnd and DisplayDateEnd are set to DateTime.Now, the parser still selects the future date.

Alternatively, is there a way to call your builtin parser (which works like a charm except for this small issue) from a custom Parse... event handler in order to tweak its result a bit?

Thanks
Phil

DatePicker

answered on 17 Mar 2011

19 answers

204 views

localized component?

Hi!

I'm currently using the GridView component. But I see that the text above(Drag a column header and drop it here to group by that column) doesn't seems to change depending of the current localisation.

I've to do a fully multilanguage interface, how can I change this text?

Thank you :)

General Discussions

answered on 17 Mar 2011

2 answers

307 views

[Solved] change the flow direction of a specific column

Hello,

I have a RadGridView control with flow direction set from right to left.
Inside the grid I have a MaskedTextBoxColumn that is used to display and edit a DateTime object.

I want to have only this column with flow direction from left to right so the date is displayed to the left of the time.
I don't see FlowDirection Property on this column or on any other column.
If I'm setting the FrameworkElement.FlowDirection property it is being ignored.

Is it possible?

Thanks,
Evgeny

GridView

answered on 17 Mar 2011

7 answers

195 views

Sort not working in new version

We have installed the new version of the GridView and some bug/issues occurs.

1. If setting the items source before columns created (throw code), the list wont display the cell content (rows are empty)...
(We fix this issus will setting the itemssource after...)

2. the sort is not woking... (wont change the result) (this is not fixed for us..)

Version working : 2010.3.1110.35
Not working : 2010.3.1314.40

We have put back the old version and its working..

Any clues...

GridView

answered on 17 Mar 2011

3 answers

118 views

Any ItemSourceControl for WPF RadGridView?

I trying to bind a "weakly-typed" data list into RadGridView, I considered IList<>, ObservableCollection<> but I think they not suit my scenario because I need to define type of element in those collections.

I found RadDataPager later but I do not need paging feature.

I wonder whether WPF RadGridView can bind to something like "DataTable" like in WinForm, but I asking it for WPF in case there is any ready component in Telerik WPF.

Anyway this is my scenario, single RadGridView is use and ready to receive data collection which may consist of different data type.

Please advise, thanks

GridView

answered on 17 Mar 2011

11 answers

683 views

[Solved] Calculated columns

Hello all,

I am new to WPF and RadControls and I am trying to use the RadGridView right now (reauirements of a new customer).

I bound my RadGridView to a simple collection of object. Displaying properties of objects works like a charm.
Anyway, I wasn't able to find how to create a calculated column based on on or several properties of the objetcs in the bound collection!

I searched the forum, the documentation and found nothing (even for the classic MS DataGrid)!

Is there any known working solution to create calculated data columns?
(be aware that it will not be possible for me to add the calclated field directly in the objects of the collection)

Thank you,
Best regards,

Daniel

GridView

answered on 16 Mar 2011