Questions on UI for WPF Forum

8 answers

469 views

Autoscroll when dragging item in TreeView

Hi,

I have a TreeView in my WPF application. Items are allowed to be dragged within the same TreeView. However, while dragging the item, the TreeView does not automatically scroll vertically when mouse approaches top or bottom borders.

I want a similar behavior like in Windows Explorer. When dragging a folder/file if the mouse approaches the border it performs automatic scroll. Otherwise it would be impossible to operate if you have large number of nodes in the tree.

Thank you,

Ruben.

TreeView

answered on 02 Mar 2012

3 answers

190 views

Maximise from code behind not working!

Sorry posted this twice!!
Hi,
I have a radtileview with a small number of tiles and I am attempting to loop through the tiles and maximse each one in turn form code behind. I get the 'Object reference not set to an instance of an object.' error when maximise is called. Can you put me right with this.
Regards,
Joe

The Code:

For I As Integer = 0 To Me.RadTileView1.Items.Count - 1

Dim item As RadTileViewItem = TryCast(Me.RadTileView1.Items(6), RadTileViewItem)

item.TileState =

TileViewItemState.Maximized

Thread.Sleep(5000)

answered on 02 Mar 2012

1 answer

82 views

How to add a calculated row to a Grid with thousands of Data

Hi:

I'm trying to create a calculated column or row to a radgridview. but the data is too much. how can i do it???

GridView

answered on 02 Mar 2012

3 answers

132 views

Add new item with filter activated

If i try to add one new element to the RadGridView with filter set for one or more columns and defaults for new item correspond to filtered elements , the new element isn't diplayed and can't be edited ....
There is a way to edit new item with filters activated ?

Thanks in advance

GridView

answered on 02 Mar 2012

1 answer

99 views

GridCheckBoxColumn shows up empty.

Hi.

<

telerik:RadGridView.RowDetailsTemplate>

<telerik:RadGridView Margin="4,5,5,4" ShowColumnFooters="False" ShowGroupPanel="False" AutoGenerateColumns="False" ShowInsertRow="False" ItemsSource="{Binding IoTerminals}">

<telerik:RadGridView.Columns>

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

<telerik:GridViewCheckBoxColumn Header="Simulated" DataMemberBinding="{Binding Simulated}"/>

<telerik:GridViewCheckBoxColumn Header="Sim is possible" DataMemberBinding="{Binding SimPossible}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</DataTemplate>

</telerik:RadGridView.RowDetailsTemplate>

(Edit: I have made two edits on this post to try to make the above xaml look approachable, but to little avail)

The two Checkbox columns shows up empty. In the debugger I see that the property "SimPossible" is executed correctly and that it return "true". The "Name" column shows the correct value (boolean True).
If I change AutoGenerateColumns to True, then the additional generated columns shows correct value (and checked status).
No binding error is displayed in the debugger output window.

Is there any further parameterization necessary to map boolean "True" to display checked status? Do I need a value converter?

As you can see, this is in the rowdetails section of another GridView (in case that is relevant).

(New Info : Replacing the GridViewCheckBoxColumn with regular GridViewDataColumn is displayed correctly)

I use Q1 2012.

GridView

answered on 02 Mar 2012

0 answers

125 views

Maintain Expand/Collapse State in RadTreeListView

I am using RadTreeListView control to display data as a hierarchical view. I am binding my entity collection to the control using ItemSource, and my entity collection is of type ObservableCollection<T>. Whenever some data is changed in the source collection, i am performing an ItemSource again on the control. This is leading to losing all the expand/collapse state of the control. Thats is, as soon as I bind the new data (ItemSource), it updated the data but closes the expand/collapse state. How can I maintain the expand/collapse state of control even after ItemSource.

TreeListView

asked on 02 Mar 2012

0 answers

136 views

Return value from another window to gridview cell

Hello,

I have a radgridview which i have bind to an ObservableCollection<objects>.
Now i want to insert a new row. I Have the following columns - Countryid | CountryName | Currency.

For the countryid and name i just type in some value in the cell...as for the Currency...i get the value from lookup.

When i double click on the cell Currency - i have a Search screen from which i select the currency.

Now the issue is that on closing the search screen , i can't return the value to the cell Currency.

Does anyone know how we can do this ?
i was trying to set the value of current cell but it did nt work.
gvcountries.Currentcell.Value = "text";

Please giv some hints on how i could tackle this.

Regards
Shaimaa

GridView

asked on 02 Mar 2012

4 answers

300 views

List Items are gray until mouse hover

When binding the RadListBox, the list items have a gray foreground color on load. It is only until I mouse over each item that they turn to black. After the mouse over it is working fine.

My Listbox is:

<telerik:RadListBox x:Name="lb1" Width="116" HorizontalAlignment="Left" IsEnabled="True" telerik:StyleManager.Theme="Windows7" ItemsSource="{Binding}">

               <telerik:RadListBox.ItemTemplate>

                   <StaticResource ResourceKey="Template1"/>

               </telerik:RadListBox.ItemTemplate>

           </telerik:RadListBox>

DataTemplate:

<Grid.Resources>

                <DataTemplate x:Key="Template1">

                    <WrapPanel>

                        <Grid>

                            <Grid.RowDefinitions>

                                <RowDefinition Height="20"/>

                            </Grid.RowDefinitions>

                            <Grid.ColumnDefinitions>

                                <ColumnDefinition Width="*"/>

                                <ColumnDefinition Width="*"/>

                            </Grid.ColumnDefinitions>

                            <TextBlock Grid.Column="0" Text="{Binding Path=A1}"/>

                            <TextBlock Grid.Column="1" Text="{Binding Path=B1}" Margin="4,0,0,0"/>

                        </Grid>

                    </WrapPanel>

                </DataTemplate>

            </Grid.Resources>

ListBox

answered on 02 Mar 2012

4 answers

102 views

Empty GridViewDataColumn cause major lag while scrolling/filtering?

Hey,

Was labbing some this morning and i come over this.

   <telerik:GridViewDataColumn Header="LogistikID" DataMemberBinding="{Binding nOrderID}" />
   <telerik:GridViewDataColumn Header="Namn" DataMemberBinding="{Binding strDisplayName}"/>
   <telerik:GridViewDataColumn Header="CareOf" DataMemberBinding="{Binding strCareOf}"/>
   <telerik:GridViewDataColumn Header="Gata" DataMemberBinding="{Binding strAddress}"/>
   <telerik:GridViewDataColumn Header="" />

If i leave one column not binded the Gridview lags like hell.

Im pretty sure i have to bind them all because i use GridViewDataColumn, but is it realy gonna lag so bad?

If i leave it empty, Shouldn't it just be ignored?

If i bind the last GridViewDataColumn it's lag free while scrolling/filtering.

Bug or Feature?

/Joachim

GridView

answered on 02 Mar 2012

2 answers

118 views

Retrieving the filtered list of items

http://www.telerik.com/community/forums/wpf/gridview/filtered-records-list.aspx

I found an old forum thread describing the problem, but its from 2009.

Within a DataTemplate I have GridView.
Within the same datatemplate I have a button where I want to do a bulk operation on the filtered set of items.
The datacontext of the DataTemplate is an INotifyPropertyChanged derived object, which provides the GridView ItemsSource.

How do I, when handling the button click, obtain the list of filtered items back from the RadGridView?

The DataTemplate is hosted within the body of a data driven RadTabControl, if it matters.

GridView

answered on 02 Mar 2012