I have discovered a GridViewComboBoxColumn, NullReferenceException that is reproducible with the Examples_WPF application. Using the GridView Editors example, if you drop down the country combo box, then select another row and try to drop down the country list, a NullReferenceException is thrown. The exception is thrown even if you try to drop down the list in the same row that you started with. I am trying to use the GridViewComboBoxColumn in my app in a similar way that the example shows and am having the same problem. I am using the latest internal build (2009.2.1023.35). The Telerik.com online demo does the same thing.

I have RadTabcontrol and whenever user click on New button I want to add new tab containing usercontrol everytime.I have successfully achieved this at run time but due to some Performance issue I want to achieve this in xaml
I tried:
 <Setter Property="telerikNavigation:RadTabControl.ItemContainerStyle">
                                        <Setter.Value>
                                            <Style TargetType="telerikNavigation:RadTabItem">
                                                <Setter Property="Foreground" Value="Black"/>
                                                <Setter Property="FontFamily" Value="Tahoma"/>
                                                <Setter Property="BorderThickness" Value="0"/>
                                                <Setter Property="BorderBrush" Value="Transparent"/>
                                                <!--<Setter Property="Content" >
                                                    <Setter.Value>
                                                        <ctrl:ctrlReview  x:Name="Uctrl" REVKEY="{Binding Source={StaticResource RevKeyProvider}}">
                                                        </ctrl:ctrlReview>
                                                    </Setter.Value>
                                                 </Setter>-->

while setting value for property content,It giving me error:Cannot add content of type 'SafetyAuditUserControl.ctrlReview' to an object of type 'System.Object'.

Please help

Hi ,im facing strange problem  , project compiles successfully,app works fine to, but designer window shows error , i dunno whats the "type: Customer" it doesnt exits in my project
thanks
itemsource provider is EntityFramework
<telerik:RadGridView.Columns>
              
  <telerik:GridViewDataColumn Header="Cost" DataMemberBinding="{Binding Cost}"  DataType="{x:Type System:Double}" >
                    <grid:GridViewDataColumn.AggregateFunctions>
                        <data:SumFunction Caption="Sumا "  SourceField="Cost" />
                    </grid:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>



Error:
Invalid property or field - 'Cost' for type: Customer
   at Telerik.Windows.Data.Expressions.MemberAccessTokenExtensions.CreateMemberAccessExpression(IMemberAccessToken token, Expression instance) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\MemberAccess\Tokenizer\MemberAccessTokenExtensions.cs:line 21
   at Telerik.Windows.Data.Expressions.ExpressionFactory.MakeMemberAccess(Expression instance, String memberName) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\ExpressionFactory.cs:line 32
   at Telerik.Windows.Data.Expressions.ExpressionFactory.MakeMemberAccess(Expression instance, String memberName, Boolean liftMemberAccessToNull) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\ExpressionFactory.cs:line 42
   at Telerik.Windows.Data.Expressions.PropertyAccessExpressionBuilder.CreateMemberAccessExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\MemberAccess\PropertyAccessExpressionBuilder.cs:line 15
   at Telerik.Windows.Data.Expressions.EnumerableSelectorAggregateFunctionExpressionBuilder.CreateMemberSelectorExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\Aggregates\EnumerableSelectorAggregateFunctionExpressionBuilder.cs:line 37
   at Telerik.Windows.Data.Expressions.EnumerableSelectorAggregateFunctionExpressionBuilder.CreateAggregateExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\Aggregates\EnumerableSelectorAggregateFunctionExpressionBuilder.cs:line 28
   at Telerik.Windows.Data.EnumerableSelectorAggregateFunction.CreateAggregateExpression(Expression enumerableExpression) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Data\Grouping\Aggregates\EnumerableSelectorAggregateFunction.cs:line 22
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.<ProjectionPropertyValueExpressions>b__3(AggregateFunction f) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 212
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.CreateProjectionInitExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 203
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.CreateAggregateFunctionsProjectionMemberBinding() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 195
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.<CreateMemberBindings>d__0.MoveNext() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 113
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at System.Linq.Expressions.ReadOnlyCollectionExtensions.ToReadOnlyCollection[T](IEnumerable`1 sequence)
   at System.Linq.Expressions.Expression.MemberInit(NewExpression newExpression, IEnumerable`1 bindings)
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.CreateSelectBodyExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 105
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilder.CreateSelectExpression() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilder.cs:line 97
   at Telerik.Windows.Data.Expressions.GroupDescriptorExpressionBuilderBase.CreateQuery() in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Expressions\Grouping\GroupDescriptorExpressionBuilderBase.cs:line 30
   at Telerik.Windows.Data.QueryableExtensions.Aggregate(IQueryable source, IEnumerable`1 aggregateFunctions) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\Collections\QueryableExtensions.cs:line 92
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CalculateAggregates() in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 3066
   at Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClass3c.<Bind>b__3b() in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 3345
   at Telerik.Windows.Controls.CursorManager.PerformTimeConsumingOperation(FrameworkElement frameworkElement, Action action) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Controls\CursorManager.cs:line 16
   at Telerik.Windows.Controls.GridView.GridViewDataControl.Bind(Object newValue) in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 3271
   at Telerik.Windows.Controls.GridView.GridViewDataControl.OnItemsSourceChanged(Object oldValue, Object newValue) in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\GridViewDataControl.cs:line 2946
   at Telerik.Windows.Controls.DataControl.OnItemsSourcePropertyChanged(DependencyObject origin, DependencyPropertyChangedEventArgs args) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\DataControl.cs:line 361
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.DataControl.set_ItemsSource(Object value) in c:\Builds\WPF_Scrum\Core_WPF\Sources\Development\Core\Data\DataControl.cs:line 149
   at Telerik.Windows.Controls.RadGridView.OnApplyTemplate() in c:\Builds\WPF_Scrum\GridView_WPF\Sources\Development\Controls\GridView\GridView\GridView\RadGridView.cs:line 226
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Designer.SimpleViewManager.DesignerBackground.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Decorator.MeasureOverride(Size constraint)
   at Microsoft.Windows.Design.Interaction.DesignerView.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Designer.Viewport.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Interop.HwndSource.SetLayoutSize()
   at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   at System.Windows.Interop.HwndSource.set_RootVisual(Visual value)
   at MS.Internal.Designer.VSIsolatedDesigner.ViewHolder.Initialize()
   at MS.Internal.Designer.VSIsolatedDesigner.ViewHolder..ctor(UIElement content)
   at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.get_ViewHandle()
   at MS.Internal.Host.Isolation.IsolatedView.get_ViewHandle()
   at MS.Internal.Designer.DesignerPane.LoadDesignerView()

Hi all,

I want to interface the Telerik RadGridView control with some data on my SQL Server backend. At the moment I am deciding the best method to do this, what I want to do on the grid is to have regions where user input is allowed (editable) and regions where it is only read only. Users will need to be able to change the editable values (which are pulled from the database) and these changes will need to be updated into the database, then used to recalculated (on the client end) and then reflected in the read only regions of the grid.

At the moment I've written functionality to get data from the database (LINQ TO SQL) and then individually create rows which are inserted into a data table which is then bound to the RAD datagrid. Will I be able to control the properties of each row this way? For example having some rows editable, some read only and also styling options such as cell back ground colour, font bolding etc.

I apologise if my description is very vague but it's the best way I can explain it at the moment!

Thanks in advance!

Tim.

Hi All.

I have an XML and I need to create the GridView based on it's content. I need to be able to add rows to the GridView manually in code. No DataView or DependencyProperties. Would appreciate a code example. The headers was easy to create, only need the rows themselves.

Regards
 Kjetil

Please help me!!!!

Hi guys!!!, Im realy scared in my RadGrid appear a ghost row, when this show 2 or more rows whit child, this event takes place when in other RadGrid changes the selection item, attach image, my code for this radGrid is the next:
                    DataTable _dtStudy =  wpfWebServexCore.ServiceGeneralClass.studys(((DataRow)rgvPatients.SelectedItem).ItemArray[0].ToString());
                    _idPatient = ((DataRow)rgvPatients.SelectedItem).ItemArray[0].ToString();
                    rgvSeries.ItemsSource = _dtStudy;
                    rgvSeries.DataMember = _dtStudy.TableName;
                    if (rgvSeries.TableDefinition.ChildTableDefinitions.Count > 0)
                    {
                        for (int i = 0; i < rgvSeries.TableDefinition.ChildTableDefinitions.Count; i++)
                        {
                            rgvSeries.TableDefinition.ChildTableDefinitions.RemoveAt(i);
                        }
                    }

                    foreach (DataRow _dr in _dtStudy.Rows)
                    {
                         
                        GridViewTableDefinition definition = new GridViewTableDefinition();
                        definition.AutoGenerateFieldDescriptors = false;
                        definition.DataSource = wpfWebServexCore.ServiceGeneralClass.series(_dr["StudyInstanceUID"].ToString());

                        //rgvSeries.UpdateLayout();

                        TableRelation _relation = new TableRelation();
                        _relation.FieldNames.Add(new FieldDescriptorNamePair("StudyInstanceUID", "StudyInstanceUID_FKey"));
                        definition.Relation = _relation;

                        rgvSeries.TableDefinition.ChildTableDefinitions.Add(definition);
                       
                        rgvSeries.AddHandler(GridViewDataControl.RowValidatingEvent, new EventHandler<GridViewRowValidatingEventArgs>(this.selectChild_clik));
                        
                    }
                    ((ExpandableDataRecord)rgvSeries.Records[0]).IsExpanded = true;
                    wpfWebServexCore.ClassGlobal.DtStudy = _dtStudy;
                    rgvImages.ItemsSource = new DataTable();

AND the XAML

 <telerik:RadGridView Height="auto" Name="rgvSeries" Width="auto" SelectionChanged="rgvSeries_SelectionChanged" ShowGroupPanel="False" IsFilteringAllowed="False" telerik:StyleManager.Theme="Office_Black" IsReadOnly="True" AutoGenerateColumns="False" ItemsSource="{Binding}" MouseDoubleClick="buttonAbrirEstudio_Click" CanUserReorderColumns="True" CanUserResizeColumns="True" CanUserFreezeColumns="False" RowIndicatorVisibility="Collapsed" Background="White" ColumnsWidthMode="Fill" HorizontalAlignment="Right" VerticalAlignment="Top">
                                <telerik:RadGridView.Columns>
                                <telerik:GridViewDataColumn HeaderText="UID" UniqueName="StudyInstanceUID" DataType="{x:Null}"   IsVisible="False" />
                                <telerik:GridViewDataColumn HeaderText="Fecha" UniqueName="Fecha" DataType="{x:Null}"  />
                                <telerik:GridViewDataColumn HeaderText="Descripción" UniqueName="Descripcion" DataType="{x:Null}"  />
                                <telerik:GridViewDataColumn HeaderText="Modalidad" UniqueName="Modalidad" DataType="{x:Null}"  />
                                <telerik:GridViewDataColumn HeaderText="Medico" UniqueName="Medico" DataType="{x:Null}"  />
                                <telerik:GridViewDataColumn HeaderText="Reporte" UniqueName="Reporte" DataType="{x:Null}"  />
                            </telerik:RadGridView.Columns>
                                    
                            <telerik:RadGridView.HierarchyChildTemplate>
                                <DataTemplate>
                                    <Border BorderBrush="#FFFDDFAA" BorderThickness="2" Margin="20,2">
                                      
                                       
                                        <telerik:RadGridView x:Name="rgvhijoSerie" IsFilteringAllowed="False" ShowGroupPanel="False" IsReadOnly="True" SelectionChanged="rgvhijoSerie_SelectionChanged" MouseDoubleClick="buttonAbrirEstudio_Click" RowIndicatorVisibility="Collapsed"  CanUserFreezeColumns="False" ShowColumnHeaders="False" Background="White" GridLinesVisibility="None">                                            
                                            <telerik:RadGridView.Columns>
                                                <telerik:GridViewDataColumn HeaderText="UID" UniqueName="StudyInstanceUID" DataType="{x:Null}"  IsVisible="False" />
                                               

                                                <telerik:GridViewDataColumn HeaderText="Fecha" UniqueName="" DataType="{x:Null}" Width="auto" IsVisible="False"  />
                                                <telerik:GridViewDataColumn HeaderText="Descripción" UniqueName="Descripcion" DataType="{x:Null}" Width="auto" />
                                                <telerik:GridViewDataColumn HeaderText="Modalidad" UniqueName="" DataType="{x:Null}" Width="auto" IsVisible="False"/>
                                                <telerik:GridViewDataColumn HeaderText="Medico" UniqueName="" DataType="{x:Null}" Width="auto" IsVisible="False" />
                                                <telerik:GridViewDataColumn HeaderText="Reporte" UniqueName="" DataType="{x:Null}" Width="auto" IsVisible="False" />

                                            </telerik:RadGridView.Columns>                                            
                                        </telerik:RadGridView>
                                        
                                       
                                    </Border>
                                </DataTemplate>
                            </telerik:RadGridView.HierarchyChildTemplate>                            
                        </telerik:RadGridView>
 

Pleas help me, or can you give me any idea

Regards!!

I want to change foreground color of a column STATUS cell value  in a grid such that if STATUS=Available then text should appear in Green else in Red.I applied the style ,while debugging Convert method is debuggung sucessfully reading correct value but doesn't show up on grid.

 <Converter:DocumentColorConverter  x:Key="ConvertDocumentColor" />

                                                                            <Style TargetType="{x:Type telerik:GridViewCell}">
                                                                                <Setter Property="Foreground" Value="{Binding [STATUS], Converter={StaticResource ConvertDocumentColor}}" />
                                                                            </Style>
 public class DocumentColorConverter : IValueConverter
    {

        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            System.Windows.Media.Brush returnValue;
            string controlType = "";
            if (value != null)
                controlType = value.ToString();

            switch (controlType)
            {
                case "Available":
                    returnValue = Brushes.Green;
                    break;
                case "UnAvailable":
                    returnValue = Brushes.Red;
                    break;
                default:
                    returnValue = Brushes.Black;
                    break;

            }

            return returnValue;
        }

        #endregion

        #region IValueConverter Members


        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        #endregion
    }

Hello,

I ran into a problem when adding a columns thru code. It seemed to work fine in the 2009 Q3 Beta 1 version. basically i'm adding the columns in codebehind then later on i'm adding data to the grid. When I do that the filters dont show up on the Column Headers.

here is some sample code.

if I set the DataType of the column the filters show up. Not sure if its a bug or not but thought i would ask.

Thanks Again,
Boots

Hi, in every row of my RadGridView appears a circle, and in  the child too. I attach an image where you can see it.

I want to not to show horizontal scroolbar on grid .I used this style but doesn't work
<Style TargetType="{x:Type telerik:GridViewScrollViewer}">
                                                            <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
                                                        </Style>