Workaround: create custom GanttViewTimelineItemElement with special layout arranging the elements in depending on their parent`s final size. The attached project features a possible implementation.

To reproduce: click (mouse down) on a task but then release the mouse button off the task. It then stays selected even when I click on other tasks. You can repeat this over and over and end up with every task as "selected" as shown in the video.

Workaround:

 AddHandler Me.RadGanttView1.GraphicalViewItemFormatting, AddressOf GraphicalViewItemFormatting

Private Sub GraphicalViewItemFormatting(sender As Object, e As GanttViewGraphicalViewItemFormattingEventArgs)
    Dim taskItem As GanttViewTaskItemElement = TryCast(e.ItemElement, GanttViewTaskItemElement)
    If taskItem IsNot Nothing AndAlso taskItem.TaskElement.VisualState.Contains(".MouseDown") AndAlso Not taskItem.Selected Then
        taskItem.TaskElement.IsMouseDown = False
    End If
End Sub

Hey,

 

We have a problem with the GanttViewTimeLineContainer as you see in the screeshot  : gantt_print2.png

When we are in TimeLineRange = TimeRange.Year and we print the gantt, we have a problem with the appearence of GanttViewTimeLineContainer, we can see the first line with the year (it's ok) but after, the second line we can see a reperition of all month : jfmamjjasond jfmamjjasond jfmamjjasond jfmamjjasond etc etc etc

Can we change the appearence ? Do you have an explanation for this visualization ? 

 

Thank you,

Regards,

Valériane E.

When you edit a link, e.g. change its end item, there is no appropriate event to handle this situation. The Links.CollectionChanged event is not fired. It would be nice to have a LinkChanged event which will be fired when a link is modified similar to the ItemChanged event for the tasks.

Workaround:
            foreach (GanttViewLinkDataItem link in this.radGanttView1.Links)
            {
                link.PropertyChanged += link_PropertyChanged;
            }

        private void link_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "EndItem")
            {
            }
            
        }

To reproduce: run the sample project and try to move a task.

Workaround:

 Timer timer = new Timer();

        private void DragDropService_Stopped(object sender, EventArgs e)
        {
            timer = new Timer();
            timer.Interval = 300;
            timer.Tick += timer_Tick;
            
        }

        private void timer_Tick(object sender, EventArgs e)
        {
            timer.Stop();
            data.Tables["Tasks"].Clear();
        }

Workaround 2:

        private void radGanttView1_ItemElementCreating(object sender, Telerik.WinControls.UI.GanttViewItemElementCreatingEventArgs e)
        {
            if (e.Item.Items.Count == 0 && e.ViewElement is GanttViewGraphicalViewElement)
            {
                e.ItemElement = new MyGanttViewTaskItemElement(e.ViewElement as GanttViewGraphicalViewElement); 
            }
        }

        public class MyGanttViewTaskItemElement : GanttViewTaskItemElement
        {
            public MyGanttViewTaskItemElement(GanttViewGraphicalViewElement ganttViewBaseViewElement) : base(ganttViewBaseViewElement)
            {
            }
            
            protected override Type ThemeEffectiveType
            {
                get
                {
                    return typeof(GanttViewTaskItemElement);
                }
            }

            public override void Detach()
            {
                var obj = this.Data;
                this.Data.SuspendPropertyNotifications();
                base.Detach();
                obj.ResumePropertyNotifications(); 
            }

            public override void Synchronize()
            {
                DataSet ds = this.Data.GanttViewElement.DataSource as DataSet;
                if (ds != null && this.Data != null)
                {
                    DataRowView rowView = this.Data.DataBoundItem as DataRowView;
                    if (rowView != null && !RowExists(rowView.Row))//!ds.Tables[0].Rows.Contains(rowView.Row))
                    {
                        return;
                    }
                }
                base.Synchronize();
            }

            private bool RowExists(DataRow dataRow)
            {
                DataSet ds = this.Data.GanttViewElement.DataSource as DataSet;
                bool res = false;
                foreach (DataRow r in ds.Tables[0].Rows)
                {
                    if (r.Equals(dataRow))
                    {
                        return true;
                    }
                }
                return res;
            }
        }

To reproduce:
1) Open the Demo application >> Settings example.
2) Select a task and activate the editor for it.
3) Delete the task by clicking the button above.

It may be necessary to repeat the steps several times. The error is not reproduced immediately. 

To reproduce:
- Set the range to lest than one day.
- Set the TimelineRange to DayHalfHours

Workaround: 
Make sure that the range is at least one day. 

Add new timeline view which shows Time/Hours

This event should be fired when a task is modified either by the graphical view or by the columns on the left side. In the arguments you should have access to the changed property.

In this particular case, the RadScheduler is integrated with the RadGanttView. When the controls are loading there is a moment when the RadGanttView control is not fully loaded and its children elements are measured. In that case, DivideByZero exception will be thrown as the Children.Count of the RadGanttView is used in the size calculations. 

After resetting the data source a child link disappears.

To reproduce:
Add Tasks which appear far after the start of the timeline. You will notice that some of them are not displayed at the right position.

To reproduce:

Open QSF, go to GanttView, open the Settings example, go to the very last task and change the view mode to month. You will notice that the positions of the tasks are not being updated

Please refer to the attached sample project and run it. Select a random item and press the button. You will obtain the error. If no selection is available, the item is removed as expected. 

Workaround: use Begin/EndUpdate block while deleting a record from the DataTable:

        Me.RadGanttView1.BeginUpdate()
        _dataset.Tables("Tasks").Rows.RemoveAt(2)
        Me.RadGanttView1.EndUpdate()

Please run the attached sample project. Select one of the child tasks and click the button. The new task is expected to be inserted at the selected item's position. However, it is appended at the bottom as it is demonstrated in the gif file.

Workaround: rebind RadGanttView after inserting a new row to the DataTable: 

    Private Sub RadButton1_Click(sender As Object, e As EventArgs) Handles RadButton1.Click
        Try
            If Me.RadGanttView1.SelectedItem IsNot Nothing Then
                Dim i_rowIndex As Int32 = _dataset.Tables("Tasks").Rows.IndexOf(Me.RadGanttView1.SelectedItem.DataBoundItem.Row)
                Dim i_datarow As DataRow = _dataset.Tables("Tasks").NewRow
                Dim i_startDate As Date = New Date(Today.Year, Today.Month, Today.Day, 8, 0, 0)
                i_datarow("ID") = 3001
                i_datarow("ParentID") = _projektID
                i_datarow("Bezeichnung") = "inserted Aufgabe"
                i_datarow("Start") = i_startDate.AddHours(6 * 5)
                i_datarow("Ende") = i_startDate.AddHours(6 + 100)
                _dataset.Tables("Tasks").Rows.InsertAt(i_datarow, i_rowIndex)
                Me.RadGanttView1.DataSource = Nothing
                With Me.RadGanttView1.GanttViewElement
                    .TaskDataMember = "Tasks"
                    .ChildMember = "ID"
                    .ParentMember = "ParentID"
                    .TitleMember = "Bezeichnung"
                    .StartMember = "Start"
                    .EndMember = "Ende"
                End With
                Me.RadGanttView1.DataSource = _dataset
            End If
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub

 

The latest release of WinForms causes a fatal exception when adding an item to a BindingList that is used in a RadGridView and a RadGanttView.

The first time an item is added there is not issue.

The second time an item is added, the following exception occurs.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.GanttViewBindingProvider.GanttTaskList.IndexOf(Object key)
   at Telerik.WinControls.UI.GanttViewBindingProvider.GanttTaskList.get_Item(Object key)
   at Telerik.WinControls.UI.GanttViewBindingProvider.AddTaskByCM(CurrencyManager cm, Int32 index)
   at System.ComponentModel.ListChangedEventHandler.Invoke(Object sender, ListChangedEventArgs e)
   at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
   at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
   at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e)
   at System.ComponentModel.BindingList`1.FireListChanged(ListChangedType type, Int32 index)
   at MissileWarningThreatPlanner.EventWindow.EventList.GenMissileEventWorker_RunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e) in C:\Shape Source\VS\MissileWarningThreatPlanner - VS2010\MissileWarningThreatPlanner\EventWindow\EventList.cs:line 5329
   at System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs e)

This is code that has not been modified for quite some time.  There has been no issue until the latest release.

I do not have time to try to create a simple example to try to reproduce the error at this time.  I will if possible.

For now, we are forced to revert to a previous version.

 

Ken...

Hi,

why is the datatype of the ChildMember/ParentMember item limited to Int32? This is a problem when displaying tasks or events from tables with string or UUID idents. It would be a more flexible control if the type could be any type. Should not be a big deal to change this or is it?

Thank you und kind regards

Karsten

To reproduce: please run the sample project and follow the steps illustrated in the attached gif file. This shows how I’m attempting to add children to a root task. Upon adding a child task I am unable to scroll down to see the rest of the pre-existent root tasks until I first collapse and expand any visible root or child task.

Workaround:

        public RadForm2()
        {
            InitializeComponent();

            this.radGanttView1.ItemAdded += radGanttView1_ItemAdded;  
        }
       
        private void radGanttView1_ItemAdded(object sender, Telerik.WinControls.UI.GanttViewItemAddedEventArgs e)
        {
            item = e.Item;
        }

        GanttViewDataItem item;
        
        private void radButton1_Click(object sender, EventArgs e)
        {
            this.radGanttView1.GanttViewElement.InvalidateMeasure(true);
            this.radGanttView1.GanttViewElement.UpdateLayout();

            this.radGanttView1.GanttViewElement.GraphicalViewElement.Scroller.ScrollToItem(item);
        }

If one applies a TypeConverter with standard values to a property, this type converter is not used to convert these standard values to and from string when they are displayed in a drop down list editor.