Questions on UI for WPF Forum

2 answers

383 views

Deleting a child in a Hierarchical Data Template

Hi, I have a database set up with a Client table and a Project table. Clients have projects, and I set up a Hierarchical Data Template to display them in the treeview. I am now putting functionality in for adding/removing both clients and projects, but I've run into an issue.

Adding and removing Clients (the parent nodes) will update the treeview immediately when I call the INotifyPropertyChanged on the ObservableCollection that it is bound to, but the Projects (the children nodes) won't update until I close the application and start it again.

Here is all the relevant code I can think of:

my xaml:

<Page.Resources>

<DataTemplate x:Key="Projects" DataType="{x:Type local:Project}">

<StackPanel Orientation="Horizontal">

<Image Source="/Images/Project.png" Height="20" Margin="0,0,8,0" />

<TextBlock Text="{Binding Name}" />

</StackPanel>

</DataTemplate>

<HierarchicalDataTemplate x:Key="Clients" DataType="{x:Type local:Client}" ItemTemplate="{StaticResource Projects}" ItemsSource="{Binding Projects}">

<StackPanel Orientation="Horizontal">

<Image Source="/Images/Client.png" Height="20" Margin="0,0,2,0" />

<TextBlock Text="{Binding Name}" />

</StackPanel>

</HierarchicalDataTemplate>

<Style x:Key="ItemContainerStyle" TargetType="{x:Type telerik:RadTreeViewItem}">

<Setter Property="Template" Value="{StaticResource SavanetekTreeItem}"/>

</Style>

</Page.Resources>

<telerik:RadTreeView x:Name="RadTreeView1" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"

Style="{StaticResource SavanetekTreeViewStyle}" ItemsSource="{Binding ClientList}" SelectedItem="{Binding Path=SelectedObject, Mode=TwoWay}"

ItemTemplate="{StaticResource Clients}" ItemContainerStyle="{StaticResource ItemContainerStyle}">

<telerik:RadTreeView.ContextMenu>

<ContextMenu>

<MenuItem Header="New Client..." Click="MenuItemNewClientDetails_Click" />

<MenuItem Header="New Project..." Command="{Binding NewProjectCommand}" />

<Separator />

<MenuItem Header="Edit..." Click="MenuItemEditClientDetails_Click"/>

<Separator />

<MenuItem Header="Remove..." />

</ContextMenu>

</telerik:RadTreeView.ContextMenu>

</telerik:RadTreeView>

my remove function:

Public Sub Remove()

If (IsProject(SelectedObject)) Then

DB.Projects.DeleteOnSubmit(SelectedObject)

SubmitChangesToDatabase()

ElseIf (IsClient(SelectedObject)) Then

DB.Clients.DeleteOnSubmit(SelectedObject)

SubmitChangesToDatabase()

Else

End If

RefreshClientList()

End Sub

And my code for the ClientList with the Refresh and the function to cast the SelectedObject to a Client or a Project:

Private _clientList As ObservableCollection(Of Client)

Public Property ClientList() As ObservableCollection(Of Client)

Get

Return _clientList

End Get

Set(ByVal value As ObservableCollection(Of Client))

_clientList = value

OnPropertyChanged("ClientList")

End Set

End Property

Public Sub RefreshClientList()

ClientList = New ObservableCollection(Of Client)()

ClientList = ClientRepo.FindAll()

OnPropertyChanged("ClientList")

End Sub

I had tried putting a for each loop in the refresh function that listed all the projects in the ClientList, and it does in fact delete/add the Projects to it, so I know that it has the proper data. It just isn't displaying it for some reason.

I would greatly appreciate if anyone knows how to remove a child from a parent on the treeview and have it refresh

TreeView

answered on 28 Sep 2010

1 answer

125 views

SaveLayout problem when RadDocking within RadTabControl

Hello,

I am really hoping that someone can help me. I am new to the Telerik controls and am having an issue with the saving of the layout of a RadDocking control when it is embedded within a RadTabControl's ContentTemplate.

I am saving the layout to a file so I can verify that it is being formatted correctly, however the SerializationTags are not getting output to the file.

Here is a snippet of the XAML to show that I am setting the SerializationTag for my RadDocumentPane:

<telerikNavigation:RadTabControl.ContentTemplate>

<Grid>

<radDock:RadDocking x:Name="ResultDocuments" Background="Transparent"

<radDock:RadDocking.DocumentHost>

<radDock:RadSplitContainer SizeChanged="SplitContainer_SizeChanged" >

<radDock:RadPaneGroup Name="RadDocumentGroup" Background="Transparent"

radDock:RadDocking.SerializationTag="DocumentGroup">

<radDock:RadDocumentPane

DataContext="{Binding DataContext,ElementName=ResultDocuments}"

Margin="0,0,0,-5" Name="DocumentPane" Title="Documents"

radDock:RadDocking.SerializationTag="DocumentPane"

HorizontalContentAlignment="Left" CanUserClose="False">

Here is a snippet of the output file I am getting:

<Items>

<Items>

</Items>

</RadPaneGroup>

</Items>

</RadSplitContainer>

</DocumentHost>

Docking

answered on 27 Sep 2010

4 answers

793 views

Finding an element in a GridViewColumn CellTemplate

It is necessary to find a specific named element in the CellTemplate of a GridViewColumn.

There is a GridViewColumn defined like this:

<GridViewColumn Header="column 1">

<GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox x:Name="txtcontent"/>

</DataTemplate>

</GridViewColumn.CellTemplate>

</GridViewColumn>

It is possible to find an element in a DataTemplate by getting the ContentPresenter where the DataTemplate is applied, and using the FindName method of the DataTemplate to find a specific element.

DataTemplate celltemplate = column.CellTemplate;

ContentPresenter contentpresenter = ...

TextBox txtbox = (TextBox)celltemplate.FindName("txtcontent", contentpresenter);

How can you find the ContentPresenter where the GridViewColumn CellTemplate is applied?

GridView

answered on 27 Sep 2010

3 answers

294 views

[Solved] How to place text on the chart area

Hi,

I have a situation which my legend text are long. I want to identify the series by placing a text label on the chart area to act as legend. Is there anyway to do that?

Thanks

Chart

answered on 27 Sep 2010

1 answer

205 views

RadMap ItemsVirtualization example throws 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll

Hi I just ran the Rad Map ItemsVirtualization example from the demo code and I notice certain sluggishness when running the map. Looking at the output window of Visual studio I've noticed a large amount of the errors

A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll
Any idea why are those thrown?
And also if I increase the density of the grid like the next line of code

 this.dynamicLayer.ZoomGridList.Add(new ZoomGrid(2 << 13, 2 << 13, 13));
the number of the errors increases tremendously.
EDIT>> I looked more into the call stack and this is the error thrown




System.ArgumentOutOfRangeException occurred Message=The added or subtracted value results in an un-representable DateTime.
Parameter name: t
  Source=mscorlib
  ParamName=t
  StackTrace:
       at System.DateTime.op_Addition(DateTime d, TimeSpan t)
  InnerException:

Map

answered on 27 Sep 2010

3 answers

185 views

Confirm in Static Methods

public static bool DisplayInfoMessage1(string strMsg)
        {
           if (MessageBox.Show(strMsg, mstrProjectName, MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.Yes)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

I want to do this using the RadWindow.Confirm box Please Help I try it any times but cannot done it

RadWindow.Confirm(strMsg, new EventHandler<WindowClosedEventArgs>(OnClosed));        can not write inside static Method

private void OnClosed(object sender, WindowClosedEventArgs e)
        {

            if (e.DialogResult == true)
            {
                ConfirmationStatus = true;
            }
            else
            {
                ConfirmationStatus = false;
            }
        }

ConfirmationStatus is Public Boolean value.

Window

answered on 27 Sep 2010

3 answers

195 views

[Solved] get data from gridview in HierarchyChildTemplate

Hi,
I have created a RadGridView with HierarchyChildTemplate, this template contains DataTemplate which contains RadGridView.
I was wondering how can i get to this RadGridView (inside my template) from code, because I would like to get all selected items in this RadGridView.

GridView

answered on 27 Sep 2010

1 answer

123 views

AggregateFunctions SumFunction

Hi,

I have a SumFuncion in my gridview. This summing all the column values.

I need that when the total sum is negative it appears on screen 0.

Can you help me?

Thanks,
Alexandre Rodrigues

GridView

answered on 27 Sep 2010

2 answers

96 views

How to target BeginInsert to detail level of hierarchy?

I have a master/detail hierarchy implementation (see attached picture).

I have coded to RowLoaded event to set GridViewRow.IsExpandable = false for master rows whose detail collection is empty. I wanted to visually show that there were no associated details, and save the user from clicking on the (+) expander control needlessly. I have set ShowInsertRow="True", and my preference is to keep ShowInsertRow="False". Instead, I would like to have a button (elsewhere in the UI) to call the BeginInsert() method. However, how do I target the detail level - particularly if the master row has an empty detail collection?

GridView

answered on 25 Sep 2010

1 answer

198 views

Nested grid view's context menu

Hi!

I have a grid which has another grid in its row details. Both grids should have a context menu, however, if I right-click in the row details grid, it shows me the context menu of the parent grid. Is there a way to have it show the child grid's context menu when right-clicking on the child?

GridView

answered on 24 Sep 2010