Questions on UI for WPF Forum

2 answers

90 views

RadPane's gridview data binding works once and then data disappears

Prism2.2: Two modules and each module represent a pane, and these two RadPane at a panelGroup in a Region and both panes have a RadGridView with different ItemsSource data binding. It works once and then data disappears when you click on each pane 2nd time. It looks like ItemsSource binding from GridView and button's command binding of each pane are looking for the same property in other module's ViewModel. It looks like a bug to me.
1. System.Windows.Data Error: 40 : BindingExpression path error: 'Pane4Source' property not found on 'object' ''Pane2ViewModel' (HashCode=63892678)'. BindingExpression:Path=Pane4Source; DataItem='Pane2ViewModel' (HashCode=63892678); target element is 'RadGridView' (Name='RadGridViewPane4'); target property is 'ItemsSource' (type 'Object') .
2. System.Windows.Data Error: 40 : BindingExpression path error: 'Pane4ButtonCommand' property not found on 'object' ''Pane2ViewModel' (HashCode=63892678)'. BindingExpression:Path=DataContext.Pane4ButtonCommand; DataItem='RadGridView' (Name='RadGridViewPane4'); target element is 'RadButton' (Name=''); target property is 'Command' (type 'ICommand')

Herewith I have attached the sample project[Change the extension as zip]
Could I know what the workaround is if there is a known issue?

Thanks.

Docking

answered on 13 Jan 2011

1 answer

178 views

Adding a CellEditTemplate to a Readonly TreeListView makes the column editable

Hello all,

Sorry if, at least the title, might seem odd at least but bear with me because it does make sense in the end.

I need a TreeList to show items that are not initially editable (i.e.: clicking on them won't start editing) but are editable in certain conditions controlled programatically. Such as pressing F2 or adding a new item in the TreeList...

Otherwise a double click is a command that should open the item in a new window (or something) and in this case the first click selects it and the second makes it enter edit mode although it is read-only.

I have isolated the problem and it seems that no matter if I set IsReadOnly=true for both the RadTreeListView and the column itself. Just adding a CellEditTemplate makes it by default editable although I wish it weren't. The only workaround that I have found is to remove completely the CellEditTemplate.

I am not able to attach an archive with a specially-prepared project that shows this exact problem. Therefore I will attach snapshots of the main files involved.

TreeListView

answered on 13 Jan 2011

1 answer

112 views

Overriding Page Down key action

I tried to override RadComboBox action for Page Down key by adding an InputBinding that associates Page down to my command. This did my command in addition to RadComboBox standard action ( open drop down and move highlight).
Is there a way override this action?

ComboBox

answered on 13 Jan 2011

5 answers

357 views

Setting properties of cell content

Hi there, I'm just starting with first rehearsing with your controls and WPF, and I would like to change the color (or any other property) of the text displayed in a bound data column, using a simple ValueConverter that return a Black/Red SolidColorBrush based on the passed value:

MyPublic Function Convert(ByVal value As Object, ByVal targetType As Type, ByVal parameter As Object, _

ByVal culture As Globalization.CultureInfo) As Object _

Implements IValueConverter.Convert

Dim myColor As New SolidColorBrush(System.Windows.Media.Colors.Black)

Try

Dim cur As Decimal = CDec(value)

If cur < 0 Then myColor = New SolidColorBrush(System.Windows.Media.Colors.Red)

Catch ex As Exception

End Try

Return myColor

End Function

and then in the XAML use an expression like this:

xxxx.ForecolorPropertyName={Binding Path=DataColumnName, Converter=MyClassConverter}

Is this possible ? Or what other way to keep it at simplest ?
regards
Ubaldo

GridView

answered on 13 Jan 2011

1 answer

78 views

DataPager and Printing all data in RadGridView

My guess is that the only way to PRINT ALL DATA in the RadGridView is using PrintExtension codes (described in GridView Forum) after getting rid of RadDataPager.
Is it?

If that is the case, I will try to toggle RadDataPager off from code-behind before printing and back on afterwards.
Is there any other way to handle printing with DataPager?

Thanks,

DataPager

answered on 13 Jan 2011

9 answers

127 views

Editing with no changes still commits value to model

I'm having some trouble understanding how the editing infrastructure in the grid works.

1) When I edit a value and press Esc once and then navigate away, nothing is set. However, if I press Esc twice, the setter for the model is triggered. Why?

2) If I go into editing mode and immediately press Enter, even though nothing has changed, the grid will still set the value on the model. Why? As a basis for comparison, the WPF toolkit grid does not exhibit this type of behavior.

3) Entering edit mode and navigating away from the cell by clicking somewhere else also exhibits the same issue.

All of these issues are present no matter what value I set ActionOnLostFocus to (I tried all 3).

Any ideas?

GridView

answered on 13 Jan 2011

3 answers

207 views

CheckBox filter

Hi,

I have a checkbox column and we want the filter showing something else when user clicking Filter instead of (True, False). Is there a way to change the default? FilterDescriptor??

Thanks

GridView

answered on 12 Jan 2011

6 answers

133 views

DoubleClick, Scroll and Drag&Drop

Hello,

I have a long RadTreeView with scrolls. This tree enables Drag&Drop (IsDragDropEnabled="True").
After a double click on an item in the tree, a mouse down on tree' scroll starts the drag operation.

Is it a bug ? How can I prevent it ?

Edit :
It is not only after a double click. This seems to occur when the event handler open a modal dialog.
Example with selection changed :

    
                    private void RadTreeView_SelectionChanged(object sender, SelectionChangedEventArgs e)  
        
                    {  
        
                        MessageBox.Show("Tree - SelectionChanged");  
        
                    }

If you select an item, then without any click on tree, you click on a tree' scroll, the drag operation starts.

I use Q1 2010 version. (2010.1.603.35)

Thanks,
Guillaume R.

TreeView

answered on 12 Jan 2011

5 answers

474 views

column width to fill

hi All

I want 1 column to fill all available width on the screen (the rest are auto width). the issue is that if I set the column Width="*" then the whole grid is way wider than the available screen space and it produces a horizontal scrollbar.

I am using the latest 2010 version.

I have seen that this issue was mentioned as a bug several times as far back as 2008. Is this still a bug in the current version?

GridView