Hi,

I am getting an exception when I am using passing an indented task into the TaskDialog and I'm not sure why.  In the code below, I am handling the TaskDialogDisplaying event, and inferring whether the task is an exposition, a phase, or a task based on how far it's indented.  If it's not indented, it opens the TaskDialog correctly.  If it is indented at all, I get the exception.  Why are ultraGanttView.ActiveTasks & ultraGanttView.Tasks different for unindented and indented tasks? 

Thanks,

Myca

namespace GanttChart.ViewModel

{

    public partial class BindingGanttView : Form

    {

        #region Constructor

        public BindingGanttView()

        {

            InitializeComponent();

        }

        #endregion

        #region Private Methods

        #endregion

        #region Form Load Event

        private void BindingGanttView_Load(object sender, EventArgs e)

        {

            //  Set the BindingContextControl property to reference this form

            this.ultraCalendarInfo1.DataBindingsForTasks.BindingContextControl = this;

            this.ultraCalendarInfo1.DataBindingsForProjects.BindingContextControl = this;

            // Set the DataSource and DataMember for Project and Tasks using the SetDataBinding method

            this.ultraCalendarInfo1.DataBindingsForProjects.SetDataBinding(ExpositionRepository.Instance, "ShowPlans");

            this.ultraCalendarInfo1.DataBindingsForTasks.SetDataBinding(ExpositionRepository.Instance, "Tasks");

            //  Set the DataBinding members for Projects

            this.ultraCalendarInfo1.DataBindingsForProjects.IdMember = "PlanGuid";

            this.ultraCalendarInfo1.DataBindingsForProjects.KeyMember = "PlanID";

            this.ultraCalendarInfo1.DataBindingsForProjects.NameMember = "PlanName";

            this.ultraCalendarInfo1.DataBindingsForProjects.StartDateMember = "PlanStartTime";

            //  Set the DataBinding members for Tasks

            // Basic Task properties

            this.ultraCalendarInfo1.DataBindingsForTasks.NameMember = "TaskName";

            this.ultraCalendarInfo1.DataBindingsForTasks.DurationMember = "TaskDuration";

            this.ultraCalendarInfo1.DataBindingsForTasks.StartDateTimeMember = "TaskStartTime";

            this.ultraCalendarInfo1.DataBindingsForTasks.IdMember = "TaskGuid";

            this.ultraCalendarInfo1.DataBindingsForTasks.ProjectKeyMember = "PlanID";

            this.ultraCalendarInfo1.DataBindingsForTasks.ParentTaskIdMember = "ParentTaskGuid"; 

            this.ultraCalendarInfo1.DataBindingsForTasks.PercentCompleteMember = "TaskPercentComplete";

            // All other properties

            this.ultraCalendarInfo1.DataBindingsForTasks.AllPropertiesMember = "AllProperties";

            //  Since we are showing a task that belongs to an explicitly defined

            //  project (i.e., not the UnassignedProject), assign that project to

            //  the control's Project property so the control knows to display that project.

            this.ultraGanttView1.CalendarInfo = new UltraCalendarInfo();

            this.ultraGanttView1.Project = this.ultraGanttView1.CalendarInfo.Projects.Add("MAMdb", DateTime.Now);

            this.ultraGanttView1.GridAreaWidth = 400;

        }

        #endregion

        #region //Event Handlers

        public void ultraGanttView1_TaskDialogDisplaying(object sender, Infragistics.Win.UltraWinGanttView.TaskDialogDisplayingEventArgs e)

        {

            if (e.Task != null)

            {

                // The following infers whether a task is a Exposition, a phase, or a basic task based on whether it is indented under it's parent task

                if (e.Task.Parent == null) // entry is a Exposition because it has no parent task and is not indented

                    openDialogExpositionEntry();

                else if (e.Task.Parent.Parent == null) //entry is a phase because it has just one parent and no grandparents (1 indent)

                    openDialogPhaseEntry();

                else //entry is a task because it has parents and grandparents (2 indents)

                    openDialogTaskEntry();

            }

        }

        #endregion //Event Handlers

        #region  //Data entry forms

        private void openDialogExpositionEntry()

        {

            // There is no additional data to define Expositions, so the default Infragistics form is sufficient

            TaskDialog infragisticsDialog = new TaskDialog(ultraGanttView1.ActiveTask, ultraGanttView1.CalendarInfo.Tasks, ultraGanttView1);

            infragisticsDialog.Name = "Exposition Entry";

        }

        private void openDialogPhaseEntry()

        {

            TaskDialog infragisticsDialog = new TaskDialog(ultraGanttView1.ActiveTask, ultraGanttView1.CalendarInfo.Tasks, ultraGanttView1);

            UltraComboEditor phaseType = new UltraComboEditor();

            //(infragisticsDialog.Controls[0] as UltraTabControl).Tabs.["General"].TabPage.Controls.Add(phaseType);

            infragisticsDialog.Controls.Add(phaseType);

        }

        private void openDialogTaskEntry()

        {

            TaskDialog infragisticsDialog = new TaskDialog(ultraGanttView1.ActiveTask, ultraGanttView1.CalendarInfo.Tasks, ultraGanttView1);

        }

        #endregion //Data entry forms