Using Visual Studio 2008 SP1 and .NET 3.5 SP1. I have a simple test project with 2 tables, PARENT and CHILD, linked by foreign key. I created the ADO.NET Entity Data Model, and named the relationship that represents the database foreign key (FK_PARENT) to Children in the PARENT entity. My goal here is to bind a grid control to PARENT.Children so the user is editing only child records for the selected parent, and in this case, it is a new PARENT record.

I have a WPF form, with 2 tabs, tab1 and tab2.

tab1 has some fields where I capture data for PARENT, then on tab2 I have a Telerik RadGridView control, bound to parent.Child (which is the association that represents the foreign key from CHILD -> PARENT).

1) I enter the data, then click tab2 (which causes tab1's LostFocus event to fire and I call entities.AddToParent(parent)
2) I use the insert key (for the Telerik RadGridView) which calls the AddingNewDataItem event, which indeed ends up adding the records to my CHILD table just fine.
3) The inserted record has the correct PARENT key.

PROBLEM: The grid shows a new empty row, with no columns, period. Just an empty grid. The database record is actually correct, however.

If I bind the grid directly to entities.CHILD, I see all CHILD columns correctly. It is the binding to the relationship that causes this problem.

To alleviate the data provider, I tested both on SQL Server and SQL Anywhere 11, but get the same results.

Essentially, I have a parent entity in scope, I want to add child entities, and I want a bound control to show those immediately, and also to allow editing.

Code here:

public partial class Window1 : Window { Entities entities; PARENT parent; bool saved = false; public Window1() { InitializeComponent(); entities = new Entities(); parent = PARENT.CreatePARENT(Guid.NewGuid().ToString(), "00000"); gridViewChild.ItemsSource = parent.Child; } private void buttonOk_Click(object sender, RoutedEventArgs e) { entities.SaveChanges(); } private void buttonCancel_Click(object sender, RoutedEventArgs e) { } private void tabItemParent_LostFocus(object sender, RoutedEventArgs e) { if (!saved) { // Create the parent parent.FIRST_NAME = this.textBoxFirstName.Text; parent.LAST_NAME = this.textBoxLastName.Text; parent.MIDDLE_NAME = this.textBoxMiddleName.Text; parent.ZIP = this.textBoxZipCode.Text; entities.AddToPARENT(parent); saved = true; } } private void gridViewChild_AddingNewDataItem(object sender, Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs e) { // Entity Framework supports identity (server side generated) keys but we // must provide a default key value first. CHILD child = CHILD.CreateCHILD(0, "Test"); parent.ChildProfile.Add(child); e.NewObject = child; } }

Help.

Hi all,

when using DataView as ItemsSource for my chart I faced performance problem or my WPF application finally does no longer response.

I take a DataView to filter the underlying DataTable data as following:

MyChart.ItemsSource = null;
DataView view = new DataView (MyDataTable);
view.RowFilter = "SUPPLIER LIKE 'MC21*";
MyChart.ItemsSource = view;

When comming the the last assigning statement of ItemsSource my application doesn't response.
This happens especially, when using the SUPPLIER Column as the XCategory of the chart.

Do you have any idea?

Thanks,
San

I'm trying to update my project to use the latest release (2009.2 813), but when I sort on any column, I get this exception:

I want to do the following which I can do with most of the itemcollections in the ms toolbox.

I want to be able to bind a custom property on an object to the SelectedProperty of a row in a gridview. The result would be that you could select multiple rows in a gridview and then each of the objects in the list that the Grid was bound to would have their IsSelectedProperty set to true.

Example of TreeView:
So each TreeViewItem IsSelected property is bound to the bound objects IsSelectedProperty.

 

<

 

Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}">

 

 

 

    <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
    ....
    ....
</Style>

Is this possible with the GridView?

Thanks,

 

After installation, under RadControls for WPF Q2 2009 SP1 in the Toolbox the same set of controls is shown multiple times.

hi

is there any easy to implement a mouse over hint on a combo box that will display what the full text of the combo box is. The actual dropdown hint can be much wider than the combo box to deal with extra long strings and need to be able to show on mouse over what is in the combo box.

any ideas or pointers gratefully accepted. Don't want to have implement a bespoke javascript/dhtml solution if I can help it

Hello,
I am developing a WPF application that uses Microsoft.SqlServerCe.Client.3.5. and LINQ

I use a grid view to show data and its XAML code looks like the following

<telerik:RadGridView x:Name="unsavedFormsGridView"

 Height="300"

 AutoGenerateColumns="False"

 ShowGroupPanel="False"

 MultipleSelect="False"

 ColumnsWidthMode="Fill">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Targa"

HeaderTextAlignment="Center"

Width="70"

IsReadOnly="True"
IsFilterable="False"

IsSortable="False"

DataMemberBinding="{Binding LandfillVehiclePlate}"/>

<telerik:GridViewDataColumn Header="N° formulario"
HeaderTextAlignment="Center"

Width="110"

IsReadOnly="True"

IsFilterable="False"

IsSortable="False"

DataMemberBinding="{Binding PrintedFormCode}"/>

<telerik:GridViewDataColumn x:Name="columnSave"
IsFilterable="False"

IsSortable="False">

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<Button x:Name="buttonSave" Click="buttonSave_Click">

<Image Source="/Images/CheckMark.png" Height="20" Width="20" />

<Button.ToolTip>

<StackPanel Orientation="Horizontal">

<Image Source="/Images/CheckMark.png" Height="20" Width="20" />

<Label Content="Salva in modo definitivo il formulario"/>

</StackPanel>

</Button.ToolTip>

</Button>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn x:Name="columnDelete" IsFilterable="False" IsSortable="False" >

<telerik:GridViewColumn.CellTemplate>

<DataTemplate>

<Button x:Name="buttonCancel" Click="buttonCancel_Click">

<Image Source="/Images/Cancel.png" Height="20" Width="20" />

<Button.ToolTip>

<StackPanel Orientation="Horizontal">

<Image Source="/Images/Cancel.png" Height="20" Width="20" />

<Label Content="Elimina in modo definitivo il formulario"/>

</StackPanel>

</Button.ToolTip>

</Button>

</DataTemplate>

</telerik:GridViewColumn.CellTemplate>

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

 

To bind data to the GridView I use an observable collection of a  LINQ  table get from the data context created on my SDF file.

ObservableCollection<MyTable> tempOperations = new ObservableCollection<MyTable>();

To initialize the GridView at program start I use this code

unsavedFormsGridView.ItemsSource = null;

tempOperations.Clear();

var temporaryOperations = from lto in dc.MyTable select lto;

foreach (MyTable item in temporaryOperations)

{

    tempOperations.Add(item);

}

unsavedFormsGridView.ItemsSource = tempOperations;

 

Everything works fine and I can appreciate all data from the file into the GridView.

Very strange is the thing that happens lately, during a save process in which I write a new record that user input.
This process is started by a Button, different from those included in the gridview.

I create a new record and add it into the observable collection tempOperations in a code like this

private void buttonSaveTemporarly_Click(object sender, RoutedEventArgs e)

{

 

  //Create the new record into currentOperation

  BuildCurrentOperation();

 

  dc.LandfillTempOperations.InsertOnSubmit(currentOperation);

  dc.SubmitChanges();

 

  unsavedFormsGridView.ItemsSource = null;

  tempOperations.Add(currentOperation);

  unsavedFormsGridView.ItemsSource = tempOperations;

 

  //Set all the input controls to blank for the next new record

  TempInitForm();

}

 

When the function terminates his job, the application does not respond to any input and more or less after 60 seconds appears the message

ContextSwitchDeadlock was detected
The CLR has been unable to transition from COM context 0x1fe3b0 to COM context 0x1fe520 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations

I must say that trying to understand more about this I have executed the application step by step.
At the end of the function VisualStudio 2008 asks to show a disassembly and in the address combobox of the disassembly window appears the following address

Telerik.Windows.Controls.GridView.BaseVirtualizingPanel.MeasureOverride(System.Windows.Size).

At this point my suspect is that there is something illegal I do in using GridView.

May anyone help me?

Thank you in advance

Nick

Hi Folks,

When I assigned values to AxisX.Title and AxisY.Title, these values do not get displayed when I run the program.   Here is a sample of my XAML code, GDF and OPTIME does not get displayed:

<

 

telerik:RadChart Width="299" Height="299" ItemsSource="{Binding Path=ConditionIndicatorDataPoints}">

 

 

 

 

    <telerik:RadChart.DefaultView>

 

 

 

 

            <telerik:ChartDefaultView>

 

 

 

 

                    <telerik:ChartDefaultView.ChartTitle>

 

 

 

 

                            <telerik:ChartTitle Content="{Binding Path=ChartName}" />

 

 

 

 

                    </telerik:ChartDefaultView.ChartTitle>

 

 

 

 

                    <telerik:ChartDefaultView.ChartLegend>

 

 

 

 

                            <telerik:ChartLegend Header="GDF"/>

 

 

 

 

                    </telerik:ChartDefaultView.ChartLegend>

 

 

 

 

                    <telerik:ChartDefaultView.ChartArea>

 

 

 

 

                            <telerik:ChartArea PlotAreaStyle="{StaticResource customStyle}">

 

 

 

 

                                    <telerik:ChartArea.AxisY>

 

 

 

 

                                            <telerik:AxisY Title="GDF" Visibility="Visible" AxisStyles="{DynamicResource customAxisTitleStyle}" />

 

 

 

 

                                    </telerik:ChartArea.AxisY>

 

 

 

 

                                    <telerik:ChartArea.AxisX>

 

 

 

 

                                            <telerik:AxisX Title="OPTIME"  Visibility="Visible" AxisStyles="{DynamicResource customAxisTitleStyle}" />

 

 

 

 

                                    </telerik:ChartArea.AxisX>

 

 

 

 

                          </telerik:ChartArea>

 

 

 

 

                    </telerik:ChartDefaultView.ChartArea>

 

 

 

 

            </telerik:ChartDefaultView>

 

 

 

 

       </telerik:RadChart.DefaultView>

 

 

 

 

        <telerik:RadChart.SeriesMappings>

 

 

 

 

                <telerik:SeriesMapping>

 

 

 

 

                        <telerik:SeriesMapping.SeriesDefinition>

 

 

 

 

                                <telerik:LineSeriesDefinition />

 

 

 

 

                         </telerik:SeriesMapping.SeriesDefinition>

 

 

 

 

                         <telerik:SeriesMapping.ItemMappings>

 

 

 

 

                                 <telerik:ItemMapping DataPointMember="YValue" FieldName="YPlotPoint" />

 

 

 

 

                         </telerik:SeriesMapping.ItemMappings>

 

 

 

 

               </telerik:SeriesMapping>

 

 

 

 

        </telerik:RadChart.SeriesMappings>

 

 

 

 

</telerik:RadChart>