Ambiguous match found

[Tim]

Hello telerik!

After applying RadControls_for_Silverlight5_2012_2_0625_DEV_hotfix; I still get the following error when my GridView gets loaded:

Ambiguous match found.

   at System.RuntimeType.GetPropertyImpl(String name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
   at System.Type.GetProperty(String name)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetValidationErrors(Object dataItem, String propertyName)
   at Telerik.Windows.Controls.GridView.GridViewCell.<GetDataErrors>d__7.MoveNext()
   at Telerik.Windows.Data.EnumerableExtensions.Count(IEnumerable source)
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateIsValidState()
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateValue()
   at Telerik.Windows.Controls.GridView.GridViewCell.SetCellElement()
   at Telerik.Windows.Controls.GridView.GridViewRow.PrepareCell(GridViewCellBase cellBase, GridViewColumn column)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.PrepareCell(GridViewCellBase cell, GridViewColumn column)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GetVirtualizedCell(GridViewColumn column, Boolean createIfNull)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.RealizeAndMeasureCells(Int32 startIndex, Int32 predictedLastIndex, Func`2 calculateNextIndex)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.UpdateVirtualizedCells()
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)

Please help!
Thanks and all the best,
Tim.

[Vera]

Hi Tim,

 
This issue should be fixed. May I ask you to share more details about your exact scenario? A code-snippet or a sample project demonstrating the problem will be a plus.

Greetings,
Vera
the Telerik team

[Tim]

Hello Vera, I am trying to create a sample project but it is not that easy because I am using Caliburn and some other stuff... But one question already came up: Is this also fixed for RadTreeListView? (Because that is what I am currently using, but as the RadTreeListView and the RadGridView got the same base it should be fixed here as well, right? But it is still not fixed - downloaded the latest release just a few minutes ago...)

Thanks a lot!!!
Tim.

[Tim]

Hello!

Unfortunately I am unable to create a sample project in reasonable time - anyway: really strange is, that it is working fine, when I replace the following line

<telerik:GridViewDataColumn Header="Label" DataMemberBinding="{Binding SessionCount}" DataFormatString="{}{0:N0}" />

with this line here:

<telerik:GridViewDataColumn Header="Label" DataMemberBinding="{Binding SessionCountXXX}" DataFormatString="{}{0:N0}" />

Of course, SessionCount and SessionCountXXX are identical beside the name. That's strange! I don't get it but it is working with any of these two lines in the old version...

Any ideas perhaps???
Thanks a lot,
Tim.

[Vlad]

Hello,

 Can you post both properties implementations? 

Kind regards,
Vlad
the Telerik team

[Jay]

I'm also seeing this error with version 2012.2.607.1050.

In my case, I've extended the RadGridView control so that I can pass in a configuration object parameter and have it build columns with specific datatypes so that sorting and filtering will work properly.

public class FeatureResultGrid : RadGridView
    {
        private List<string> _blackListedColumns = new List<string>()
        {
            "OBJECTID", "SHAPE", "GEOG"
        };

        private RelayCommand _copyToClipboardCommand;
        public RelayCommand CopyToClipboardCommand
        {
            get
            {
                return _copyToClipboardCommand = new RelayCommand(
                    () =>
                    {
                        StringBuilder clipboard = new StringBuilder();

                        if (this.Items.Count > 0)
                        {
                            clipboard.AppendLine("<TABLE>");

                            clipboard.AppendLine("<TR>");
                            foreach (var col in GridConfig.ColumnDefinitions)
                            {
                                clipboard.AppendFormat("<TH>{0}</TH>", col.DisplayName);
                            }
                            clipboard.AppendLine("</TR>");

                            foreach (Graphic graphic in this.Items)
                            {
                                clipboard.AppendLine("<TR>");
                                foreach (var col in GridConfig.ColumnDefinitions)
                                {
                                    clipboard.AppendFormat("<TD>{0}</TD>", graphic.Attributes[col.DisplayName].ToString());
                                }
                                clipboard.AppendLine("</TR>");
                            }
                            clipboard.AppendLine("</TABLE>");
                        }
                        System.Windows.Clipboard.SetText(clipboard.ToString());
                    }
                );
            }
        }


        public FeatureResultGrid()
        {
            AutoGenerateColumns = false;

            SelectionMode = System.Windows.Controls.SelectionMode.Multiple;
            SelectionChanged += (s, e) =>
            {
                if (GridConfig != null && GridConfig.SelectedItems != null)
                {
                    if (e.AddedItems != null)
                    {
                        foreach (var item in e.AddedItems)
                        {
                            GridConfig.SelectedItems.Add((Graphic)item);
                        }
                    }
                    if (e.RemovedItems != null)
                    {
                        foreach (var item in e.RemovedItems)
                        {
                            GridConfig.SelectedItems.Remove((Graphic)item);
                        }
                    }
                }
            };
        }



        #region -------------------- FeatureGridConfiguration --------------------
        /// <summary>
        /// The <see cref="GridConfig" /> dependency property's name.
        /// </summary>
        public const string GridConfigPropertyName = "GridConfig";

        /// <summary>
        /// Gets or sets the value of the <see cref="GridConfig" />
        /// property. This is a dependency property.
        /// </summary>
        public FeatureGridParameter GridConfig
        {
            get
            {
                return (FeatureGridParameter)GetValue(GridConfigProperty);
            }
            set
            {
                SetValue(GridConfigProperty, value);
            }
        }

        /// <summary>
        /// Identifies the <see cref="GridConfig" /> dependency property.
        /// </summary>
        public static readonly DependencyProperty GridConfigProperty = DependencyProperty.Register(
            GridConfigPropertyName,
            typeof(FeatureGridParameter),
            typeof(FeatureResultGrid),
            new PropertyMetadata(null,
                (d, e) =>
                {
                    ((FeatureResultGrid)d).BuildColumns(((FeatureGridParameter)e.NewValue).ColumnDefinitions);
                }
                )
            );

        #endregion -------------------- FeatureGridConfiguration --------------------

        private void BuildColumns(IList<ColumnDefinition> columns)
        {
            foreach (var columnDef in columns)
            {
                if (!_blackListedColumns.Contains(columnDef.DisplayName.ToUpper()))
                {
                    GridViewDataColumn col = new GridViewDataColumn();
                    col.DataMemberBinding = new Binding(columnDef.BindingString);
                    col.MaxWidth = 300;
                    col.TextWrapping = TextWrapping.Wrap;
                    col.Header = columnDef.DisplayName;
                    col.DataType = columnDef.DataType;
                    col.UniqueName = columnDef.DisplayName;

                    col.DataFormatString = columnDef.GetFormat();
                    col.ShowDistinctFilters = false;
                    col.IsSortable = true;

                    Columns.Add(col);


                    if (columnDef.IsInitialSortColumn)
                    {
                        this.SortDescriptors.Add(new ColumnSortDescriptor()
                        {
                            Column = col,
                            SortDirection = System.ComponentModel.ListSortDirection.Descending
                        }
                        );
                    }
                }
            }
        }

    }

This is the parameters class:

/// <summary>
/// Class encapsulates all of the parameter information for a feature grid.
/// Using this method solves the problem where we need to take action only
/// when all parameters have been passed in to the control.
/// </summary>
public class FeatureGridParameter :INotifyPropertyChanged
{
    private string _uniqueIdColumnName;
    private IList<ColumnDefinition> _columnDefinitions;

    /// <summary>
    /// The name of the column that holds the unique values.  For ArcGis
    /// Server feature services, this is usually OBJECTID.
    /// </summary>
    public string UniqueIdColumn
    {
        get
        {
            return _uniqueIdColumnName;
        }
        set
        {
            if (value != _uniqueIdColumnName)
            {
                _uniqueIdColumnName = value;
                RaisePropertyChanged("UniqueIdColumn");
            }
        }
    }

    /// <summary>
    /// List of all available columns
    /// </summary>
    public IList<ColumnDefinition> ColumnDefinitions
    {
        get
        {
            return _columnDefinitions;
        }
        set
        {
            if (value != _columnDefinitions)
            {
                _columnDefinitions = value;
                RaisePropertyChanged("ColumnDefinitions");
            }
        }
    }


    public ObservableCollection<Graphic> SelectedItems { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void RaisePropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

}

This is how I implemented it in xaml:

<foc:FeatureResultGrid
    GridConfig="{Binding Path=GridConfiguration}"
    ItemsSource="{Binding }"
    CanUserSelect="False"
    ShowGroupPanel="False" IsReadOnly="True" IsFilteringAllowed="False"
    CanUserFreezeColumns="False" RowIndicatorVisibility="Collapsed"
    >
    <toolkit:ContextMenuService.ContextMenu>
        <toolkit:ContextMenu>
            <toolkit:MenuItem Header="Copy" IsEnabled="True" >
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="Click">
                        <mvvm:EventToCommand Command="{Binding Path=CopyToClipboardCommand}"/>
                    </i:EventTrigger>
                </i:Interaction.Triggers>
            </toolkit:MenuItem>
        </toolkit:ContextMenu>
    </toolkit:ContextMenuService.ContextMenu>
    <foc:FeatureResultGrid.Columns>
        <telerik:GridViewColumn >
            <telerik:GridViewColumn.CellTemplate>
                <DataTemplate>
                    <telerik:RadButton
                        BorderThickness="0" Padding="0"
                        Height="17" Width="17"
                        ToolTipService.ToolTip="Center map on point." >
                        <telerik:RadButton.Content>
                            <Path Fill="Transparent" Stroke="Black" StrokeThickness=".75">
                                <Path.Data>
                                    <GeometryGroup>
                                        <EllipseGeometry RadiusX="4" RadiusY="4" Center="6,6"/>
                                        <LineGeometry StartPoint="0,6" EndPoint="11,6"></LineGeometry>
                                        <LineGeometry StartPoint="6,0" EndPoint="6,11"></LineGeometry>
                                    </GeometryGroup>
                                </Path.Data>
                            </Path>
                        </telerik:RadButton.Content>
                        <i:Interaction.Triggers>
                            <i:EventTrigger EventName="Click">
                                <mvvm:EventToCommand
                                    Command="{Binding RelativeSource={RelativeSource AncestorType=UserControl}, Path=DataContext.FlashFeatureCommand}"
                                    CommandParameter="{Binding}" />
                            </i:EventTrigger>
                        </i:Interaction.Triggers>
                    </telerik:RadButton>
                </DataTemplate>
            </telerik:GridViewColumn.CellTemplate>
        </telerik:GridViewColumn>
    </foc:FeatureResultGrid.Columns>
</foc:FeatureResultGrid>

Ambiguous match found.
Stack Trace:
   at System.RuntimeType.GetPropertyImpl(String name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
   at System.Type.GetProperty(String name)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetValidationErrors(Object dataItem, String propertyName)
   at Telerik.Windows.Controls.GridView.GridViewCell.<GetDataErrors>d__7.MoveNext()
   at Telerik.Windows.Data.EnumerableExtensions.Count(IEnumerable source)
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateIsValidState()
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateValue()
   at Telerik.Windows.Controls.GridView.GridViewCell.SetCellElement()
   at Telerik.Windows.Controls.GridView.GridViewRow.PrepareCell(GridViewCellBase cellBase, GridViewColumn column)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.PrepareCell(GridViewCellBase cell, GridViewColumn column)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GetVirtualizedCell(GridViewColumn column, Boolean createIfNull)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.RealizeAndMeasureCells(Int32 startIndex, Int32 predictedLastIndex, Func`2 calculateNextIndex)
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.UpdateVirtualizedCells()
   at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)


Let me know if you'd like me to create a sample project.

Thanks!
Jay

[Vlad]

Hi Jay,

 Please open support ticket and send us small project demonstrating the error. 

Regards,
Vlad
the Telerik team

[Jay]

I'm having trouble replicating the issue in a sample project.  In the project where I'm seeing the issue, I've narrowed the problem down to setting the DataMemberBinding property of a GridViewDataColumn to a binding that uses a dictionary path.  

I've reverted to using version 2012.1.326.1050 where the problem does not exist.

Jay

[Vera]

Hello Jay,

 
Thank you for the project sent. I tested it with our Latest Internal Build and I did not get the exception. May I ask you to download it and to give it a try? 

Kind regards,
Vera
the Telerik team

[Andrea]

Hi Vera,

I have this problem when binding to strongly typed datasets by using the square braket notation in the Binding like the example below.

  <telerik:GridViewDataColumn IsReadOnly="True" Header="Nr" DataMemberBinding="{Binding Path=[CU_NumeroPratica]}">
                    </telerik:GridViewDataColumn>

Thank you,

Giulio

[Vlad]

Hello,

 Can you post more info about your grid version? Are you using our latest official Q2 2012 SP2?

Regards,
Vlad
the Telerik team