Questions on UI for WPF Forum

2 answers

130 views

Hello,

I want to implement navigation through MVVM in a WPF aplication using RadTree.

I want to do that, when someone clicks over an item of the tree, the VM executes a Command to change the active view in another prism region.

¿Can you help me with that? I don't know to which element in xaml need to attach the Command, if the RadTree is Binding to an Observable Collection of the VM.

Thanks in advance

TreeView

answered on 08 Feb 2013

4 answers

93 views

Removing GridRow Via Code

Hi,
I'm creating a predetermined list of GridView's as controls in a WPF ItemsControl control, and am trying to remove rows via the ViewModel code. I am able to reference the ItemsControl binding, and when I try to delete a specified row via MyGrid.Items.Remove(knownRow), it fails (I also tried adding MyGrid.Items.Refresh() after it). I walked through the code, and found that the property MyGrid.Items.CanRemove is set to false. It's a get only property, so changing it isn't an option.

When creating the grid dynamically, I also tried setting the following properties:

grid.CanUserDeleteRows = true;
grid.IsReadOnly = false;

How do I go about removing rows from the grid?

Thanks,
Ryan

GridView

answered on 08 Feb 2013

2 answers

127 views

Data binding error when adding children to new parents.

Hi
I am having difficulty with databinding and child objects with the RadGridview control.
I have a custom object that exposes two properties; a string and a collection (List<>) of child objects. The child objects only expose a single string property.
If I load a number of instances of the custom object each with children, into an Observable collection, the databinding seems to work and I can add new children to the existing parents without any problem.
However, if I add a new parent, when I attempt to add a new child there are databinding errors stating the property name cannot be found and the child is not retained in the child table in the grid control. (BindingExpression path error: 'FloorNo' property not found on 'object' ''Object').
I'm using the MVVM pattern so I am trying to define the hierarchy in the XAML which I've listed below.
Note: Buildings is the observable collection of the custom object Building.
BuildingNo is the string property of Building and Floors is the List<Floor> property where Floor is the child object. FloorNo is the string property of Floor.
Please can you suggest what I need to do to correct or improve the XAML to enable the creation of new children in new parents?
Thanks
Craig

<telerik:RadGridView HorizontalAlignment="Left" Margin="378,0,0,262" Name="buildingsGridView" VerticalAlignment="Bottom" Width="193" Height="197"

ItemsSource="{Binding Buildings, Mode=TwoWay}" AutoGenerateColumns="False" ShowGroupPanel="False" ShowInsertRow="True"

RowHeight="23" RowIndicatorVisibility="Collapsed" ScrollViewer.HorizontalScrollBarVisibility="Disabled"

CanUserFreezeColumns="False" CanUserReorderColumns="False" CanUserResizeColumns="True" SelectedItem="{Binding SelectedBuilding}">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding BuildingNo}" Header="Building No." IsFilterable="False" IsGroupable="False" IsReorderable="False" IsResizable="False" ShowDistinctFilters="False" Width="*"/>

</telerik:RadGridView.Columns>

<telerik:RadGridView.ChildTableDefinitions>

<telerik:GridViewTableDefinition>

<telerik:GridViewTableDefinition.Relation>

<telerik:PropertyRelation ParentPropertyName="Floors" />

</telerik:GridViewTableDefinition.Relation>

</telerik:GridViewTableDefinition>

</telerik:RadGridView.ChildTableDefinitions>

<telerik:RadGridView.HierarchyChildTemplate>

<DataTemplate>

<telerik:RadGridView ItemsSource="{Binding Floors, Mode=TwoWay}" Name="floorsGrid" ShowGroupPanel="False" AutoGenerateColumns="False">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding FloorNo}" Header="Floor No." IsFilterable="False" IsGroupable="False" IsReorderable="False" IsResizable="False" ShowDistinctFilters="False" Width="*" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</DataTemplate>

</telerik:RadGridView.HierarchyChildTemplate>

</telerik:RadGridView>

GridView

answered on 08 Feb 2013

1 answer

103 views

Problem with RadDateTimepicker in Grid cells

Hi There,

we observed an issue with the DateTimepicker,

There seem to be an inconsistent behaviour in RadGridView cells. please check the attached image for more clear details,

Thanks in advance,
Srinivas.

DateTimePicker

answered on 08 Feb 2013

3 answers

243 views

SelectionChanged in a BarSeries?

Hello,

I am using the ChartView with several BarSeries and want to show a popup, when a certain bar is selected.
What's the recommended way to accomplish this?

I was looking at http://www.telerik.com/help/silverlight/radchartview-features-selection.html and tried to use the SelectionChanged event. However, it never gets fired.

I also tried retemplating the BarSeries.PointTemplate and using a transparent Button that overlays the Bar.
However, the Button's command is never invoked - not even when I set the BarSeries' HitTestVisible to true.

Thank you

ChartView

answered on 08 Feb 2013

3 answers

209 views

start auto list after 3 characters

RadAutocompleteBox is working fine.

but i have additional requirment that, auto search should start if user have entered 3 characters or more.

i can write script, but does it have property which can be helpful.

AutoCompleteBox

answered on 08 Feb 2013

5 answers

163 views

RadCarousel Newbie Questions

Hi,

I started work with RadCarousel recently, and I have 2 questions:

1) Is there a way to hide RadCarousel navigation panel ? (navigation panel screenshot attached)
2) How can i make the front Item always be selected?

Thanks for your help,

Harri.

Carousel

answered on 08 Feb 2013

3 answers

286 views

Fixed connector positions?

See attached image. We have a button on our diagram nodes that lets us show more details about the node. The UI element expands thanks to some binding tricks in the template. However, as you can see, the connector follows its relative position. We would like to keep the connector at its original position in order to preserve the "arrow structure". If the arrows/connections start jumping around the user gets a little confused. Is this possible?

I sense that such a functionality requires some advanced template stuff. Please show us an example! Thanks.

Diagram

answered on 08 Feb 2013

2 answers

268 views

FilterDescriptorCollection using OR

I have a DataGrid that needs to be filtered programatically. I populate the dependency grid with a ItemsSource with all my data in it. When I select an item in a parent grid, I want this grid to filter showing the one or many dependency items.

So, I'd figured out I can clear the FilterDescriptorCollection and add items to it in using this syntax. Note FilterSettings = FilterDescriptorCollection:

aggregationGridView.FilterSettings.Clear();

foreach (AggregateDD child in aggregate.ChildList)

{

FilterDescriptor filter = new FilterDescriptor(

"AggregateID", FilterOperator.IsEqualTo, child.AggregateID);

aggregationGridView.FilterSettings.Add(filter);

}

However, this seems to write a query that as AND instead of OR. This is more the query I'd like to run:

( (AggregateID IsEqualTo 385 MC) OR (AggregateID IsEqualTo 386 MC) OR (AggregateID IsEqualTo 387 MC) OR (AggregateID IsEqualTo 388 MC) )

How do I add a new FilterDescriptor to the FilterDescriptorCollection as an OR?

Thanks for your help.

GridView

answered on 07 Feb 2013

1 answer

216 views

Can we filter multiple columns

Is there a control that lets us set filtering on multiple controls? Preferably one where the user can set up expressions involving filter operators and fields. (Ex: all rows where column A's numerical values are more than 50 or column B's string values include 'operating'")

GridView

answered on 07 Feb 2013