Looking for input on what others do. I've implemented a custom provider. I create a large image in memory and then slice it into tiles. This works until the image is too big and I run out of memory. Surely there is a better way to do this. Ideally I would like something that creates the tiles directly to disk. Another 'problem' is that I'm doing things like 'DrawPolygon' onto my image so I don't have knowledge of exactly which pixels are being colored, otherwise I could easily figure which pixels to write to. Appreciate any help. Thanks.

I want to bind a chart to a table in sql server, is that possible in wpf for windows application?

Thanks in advance

When the user adds a new row to the GridView and then cancels the inserting process the event 'RowEditEnded' is called with "e.EditOperationType == Insert" and  "e.EditAction == Cancel".

Is there some way to get the BusinessObject behind the inserted row that was canceled?

e.EditedItem, e.NewData are both null.

Hi,
I am trying to bind a hierachical gridview using entity framework 4.0. (tables: Countries with Districts)
Whenever i try to add a child table definition to the main gridview  the ability to sort the child gridview is lost ( when setting the property relation):
d.Relation = new Telerik.Windows.Data.PropertyRelation("Districts");

If i manually add the datasource then sorting works perfectly. Is this the normal behaviour ? Am i doing something wrong?

GridViewTableDefinition d = new GridViewTableDefinition();
d.DataSource = new SofERPEntities().Districts.Where(z=>z.CountryId==5).ToList();   => sorting in child gridview works
 //d.Relation = new Telerik.Windows.Data.PropertyRelation("Districts");  => sorting in child gridview not working
this.radGridView1.ChildTableDefinitions.Add(d);

I'm trying to write an app where each part of the config is held in a usercontrol.  In moving this to WPF from winforms I thought it would look good to put the config tabbed in a ribbon at the top.

I tried using the ribbonbar but ran into a problem when a tab was selected that contained a usercontrol  I've now got the RibbonView and tried the same thing and run into the same problem.

My code is:



Where UserControl1 is an empty user control.

When I try to run this, I get the following error:

Specified element is already the logical child of another element. Disconnect it first.

The trace is:

   at System.Windows.FrameworkElement.ChangeLogicalParent(DependencyObject newParent)
   at System.Windows.FrameworkElement.AddLogicalChild(Object child)
   at System.Windows.Controls.HeaderedContentControl.OnHeaderChanged(Object oldHeader, Object newHeader)
   at System.Windows.Controls.HeaderedContentControl.OnHeaderChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   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, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.StyleHelper.ApplyTemplatedParentValue(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, DependencyProperty dp, FrameworkElementFactory templateRoot)
   at System.Windows.StyleHelper.InvalidatePropertiesOnTemplateNode(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, Boolean isDetach, FrameworkElementFactory templateRoot)
   at System.Windows.FrameworkTemplate.InvalidatePropertiesOnTemplate(DependencyObject container, Object currentObject)
   at System.Windows.FrameworkTemplate.HandleBeforeProperties(Object createdObject, DependencyObject& rootObject, DependencyObject container, FrameworkElement feContainer, INameScope nameScope)
   at System.Windows.FrameworkTemplate.<>c__DisplayClass6.<LoadOptimizedTemplateContent>b__3(Object sender, XamlObjectEventArgs args)
   at System.Xaml.XamlObjectWriter.OnBeforeProperties(Object value)
   at System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart(ObjectWriterContext ctx)
   at System.Xaml.XamlObjectWriter.WriteStartMember(XamlMember property)
   at System.Xaml.XamlWriter.WriteNode(XamlReader reader)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)

The data renders just fine but the Click event does not fire...

XAML below


C# code below

Hi,

I using a MVVM environment and try to achieve an auto size of all columns depending on a user preselected mode.
Therefore I've bound the RadGridView.ColumnWidth to a Property in the ViewModel. As I change the value of the property the values of the grid is also changing but the existing Columns are not resized. To force the resize if have iterate to each Column an change the Width.
But is not the best thing to do in an MVVM concept. Is there any better solution for that?

Regards
Thomas

I used the following in a console app to create and save Chart to png.
It works for LineSeries but the BarSeries is missing.
Please help.



using System;
using System.Collections.Generic;
using System.Threading;
using System.Windows.Threading;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.Charting;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            Processor processor = new Processor();
            processor.Process();
        }
    }

    public class Processor
    {
        private SaveChartProcessor _ruleProcessor = new SaveChartProcessor();
        public void Process()
        {
            var processRuleThread = new Thread(workerThreadProcessRule);
            processRuleThread.Start();
        }

        private void workerThreadProcessRule()
        {
            _ruleProcessor.SaveImage();
        }
    }


    public class SaveChartProcessor
    {
        public void SaveImage()
        {
            var newThread = new Thread(processChartImageWorker);
            newThread.SetApartmentState(ApartmentState.STA);
            newThread.Start();
        }

        public void processChartImageWorker()
        {
            var chart = new RadChart();
            chart.BeginInit();

            chart.Width = 640;
            chart.Height = 480;
            chart.DefaultView.ChartArea.EnableAnimations = false;

            SeriesMapping sm1 = new SeriesMapping();
            //sm1.SeriesDefinition = new LineSeriesDefinition();   //<-LineSeries works
            sm1.SeriesDefinition = new BarSeriesDefinition();      //<-BarSeries doesn't work
            sm1.LegendLabel = "Line Series 1";
            sm1.CollectionIndex = 0;
            ItemMapping im1 = new ItemMapping();
            im1.DataPointMember = DataPointMember.YValue;
            sm1.ItemMappings.Add(im1);
            SeriesMapping sm2 = new SeriesMapping();
            //sm2.SeriesDefinition = new BarSeriesDefinition();
            sm2.SeriesDefinition = new LineSeriesDefinition();
            sm2.LegendLabel = "Line Series 2";
            sm2.CollectionIndex = 1;
            ItemMapping im2 = new ItemMapping();
            im2.DataPointMember = DataPointMember.YValue;
            sm2.ItemMappings.Add(im2);

            // Force chart to measure itseft so it provides the actual width and height to export
            chart.Measure(new System.Windows.Size(chart.Width, chart.Height));
            chart.Arrange(new System.Windows.Rect(chart.DesiredSize));

            chart.SeriesMappings.Add(sm1);
            chart.SeriesMappings.Add(sm2);

            chart.EndInit();

            var itemsSource = new List<double>[] { new List<double> { 9, 2, 3, 4 }, new List<double> { 5, 7, 3, 4 } };
            chart.ItemsSource = itemsSource;

            string path = "d:\\newpic.png";

            chart.Dispatcher.Invoke(
                    new Action(() =>
                    {
                        chart.Save(path);
                    }),
                    DispatcherPriority.Normal);
        }
    }
}

Hi Telerik,

we are unable select an item through code. we used the item.IsSelected=true. though it highlited in different color from the one which is shown when we clicked manually. Please could you help us resolving this.

How do i do this?

the scenario is that i have this certain student collection, each student can choose all or some of his enrolled subjects from the multiselect control.

how would you guys do this with a RadGridview Column?

Using mvvm, I tried binding the gridviewcomboboxcolumn with a Keyvaluepair of id  and a checkbox collection, but when i tried to show it, it doesn't display the checkbox control in the combo box.