Xceed PropertyGrid work with System.Windows.Media.PointCollection

[Ric.man666]

#43857 |

Hi,
I have a problem.
I using property grid to set Collection of points, but program give me InvalidOperationException: collection has been changed…
What am I doing wrong?

Thank for answer.

Sniped code:
[TypeConverter(typeof(PointCollectionConverter))]
public PointCollection Points
{
get
{
return ((Polyline)xamlDraw.DRAW_OBJECT).Points;
}
set
{
((Polyline)xamlDraw.DRAW_OBJECT).Points = value;
}
}

[Fawzi [Xceed]]

#43858

Hi,

Could you give me more details regarding the exception( sequence of activities, sample project,..) so that I could have a closer look.

[Ric.man666]

#43859

I wrote small sample.
Everything property works perfectly, but property with PointCollection generate exception while save 🙁

Sorry for my English

Thanks for help

Xaml:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApplication1"
        xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="600">
    <Grid>
        <xctk:PropertyGrid x:Name="workplace_property" ShowSearchBox="False" Background="WhiteSmoke" UpdateTextBoxSourceOnEnterKey="True" ShowAdvancedOptions="True" SnapsToDevicePixels="True" IsMiscCategoryLabelHidden="True" SelectedObject="{Binding}" HorizontalAlignment="Right" Width="251"/>
        <Canvas Name="myCanvas" Margin="0">
        </Canvas>
    </Grid>
</Window>

cs:

using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
using Xceed.Wpf.Toolkit.PropertyGrid.Attributes;

namespace WpfApplication1
{
    public partial class MainWindow : Window
    {
        public Polyline drawobj;
        public MainWindow()
        {
            InitializeComponent();

            drawobj = new Polyline();
            drawobj.Points = new PointCollection() { new Point(10, 20), new Point(40, 20), new Point(150, 150) };
            drawobj.StrokeThickness = 2;
            drawobj.Stroke = new SolidColorBrush(Colors.Black);

            myCanvas.Children.Add(drawobj);

            workplace_property.SelectedObject = new polyline_property(drawobj);   
        }
    }

    public class polyline_property
    {
        private Polyline drawobj;

        public polyline_property(Polyline obj)
        {
            drawobj = obj;
        }

        public PointCollection Points
        {
            get
            {
                return drawobj.Points;
            }
            set
            {
                drawobj.Points = value;
            }
        }

        public Color Color
        {
            get
            {
                return ((SolidColorBrush)drawobj.Stroke).Color;
            }
            set
            {
                ((SolidColorBrush)drawobj.Stroke).Color = value;
            }
        }

        public Double StrokeThickness
        {
            get
            {
                return drawobj.StrokeThickness;
            }
            set
            {
                drawobj.StrokeThickness = value;
            }
        }

        public DoubleCollection StrokeDashArray
        {
            get
            {
                return drawobj.StrokeDashArray;
            }
            set
            {
                drawobj.StrokeDashArray = value;
            }
        }

        public PenLineCap StrokeDashCap
        {
            get
            {
                return drawobj.StrokeDashCap;
            }
            set
            {
                drawobj.StrokeDashCap = value;
            }
        }

        public Double StrokeDashOffset
        {
            get
            {
                return drawobj.StrokeDashOffset;
            }
            set
            {
                drawobj.StrokeDashOffset = value;
            }
        }
    }
}

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