Custom Task Field with value Undefined

[Sebastian]

Hello,

I trying to create a custom task field "Description" like in the documentation DOC, but  binding RadGantt's Datasource  simply in Page_Load event.

 

My Code:

public class CustomGanttTaskFactory : ITaskFactory
{
    Task ITaskFactory.CreateTask()
    {
        return new CustomTask();
    }
}

public class CustomTask : Task
{
    public CustomTask()
        : base()
    {
    }

    public string Description
    {
        get { return (string)(ViewState["Description"] ?? ""); }
        set { ViewState["Description"] = value; }
    }

    protected override IDictionary<string, object> GetSerializationData()
    {
        var dict = base.GetSerializationData();
        dict["Description"] = Description;
        return dict;
    }

    public override void LoadFromDictionary(System.Collections.IDictionary values)
    {
        base.LoadFromDictionary(values);

        Description = (string)values["Description"];
    }
}

 

Page_Load

List<ITask> newFinalTask = new List<ITask>();
        newFinalTask.Add(new CustomTask { ID = 1, Description = "TEST1", OrderID = 1, ParentID = null, Title = "TITLE A", Start = new DateTime(2017, 01, 10, 0, 0, 0), End = new DateTime(2017, 01, 19, 23, 59, 59), PercentComplete = 0.20M, Expanded = false, Summary = true });
        newFinalTask.Add(new CustomTask { ID = 2, Description = "TEST2", OrderID = 2, ParentID = 1, Title = "SUB A1", Start = new DateTime(2017, 01, 10, 0, 0, 0), End = new DateTime(2017, 01, 15, 23, 59, 59), PercentComplete = 0.20M, Expanded = false });
        newFinalTask.Add(new CustomTask { ID = 3, Description = "AAAA", OrderID = 3, ParentID = 1, Title = "SUB A2", Start = new DateTime(2017, 01, 16, 0, 0, 0), End = new DateTime(2017, 01, 19, 23, 59, 59), PercentComplete = 0.20M, Expanded = false });
        newFinalTask.Add(new CustomTask { ID = 4, Description = "BB", OrderID = 4, ParentID = null, Title = "TITLE B", Start = new DateTime(2017, 01, 20, 0, 0, 0), End = new DateTime(2017, 01, 31, 23, 59, 59), PercentComplete = 0.20M, Expanded = false, Summary = true });
        newFinalTask.Add(new CustomTask { ID = 5, Description = "CCCC", OrderID = 5, ParentID = 4, Title = "SUB B1", Start = new DateTime(2017, 01, 20, 0, 0, 0), End = new DateTime(2017, 01, 31, 23, 59, 59), PercentComplete = 0.20M, Expanded = false });

RadGantt1.DataSource = newFinalTask;

 

Desing

<telerik:RadGantt runat="server" ID="RadGantt1"
    Enabled="true"
    ReadOnly="True"
    AllowSorting="False"
    AutoGenerateColumns="false">
    <DataBindings>
        <TasksDataBindings
            IdField="ID"
            TitleField="Title"
            StartField="Start"
            EndField="End"
            PercentCompleteField="PercentComplete"
            OrderIdField="OrderID"
            SummaryField="Summary"
            ParentIdField="ParentID"  />
    </DataBindings>
    <CustomTaskFields>
        <telerik:GanttCustomField PropertyName="Description" ClientPropertyName="description" Type="String"/>
    </CustomTaskFields>
    <Columns>
        <telerik:GanttBoundColumn DataField="ID" HeaderText="ID" AllowEdit="false" AllowSorting="false"></telerik:GanttBoundColumn>
        <telerik:GanttBoundColumn DataField="Description" HeaderText="Desc." DataType="String" UniqueName="Description"></telerik:GanttBoundColumn>
        <telerik:GanttBoundColumn DataField="Title" HeaderText="ACTIVITY" AllowEdit="false" AllowSorting="false"></telerik:GanttBoundColumn>
        <telerik:GanttBoundColumn DataField="Start" HeaderText="START" DataFormatString="dd/MM/yyyy" AllowEdit="false" AllowSorting="false"></telerik:GanttBoundColumn>
        <telerik:GanttBoundColumn DataField="End" HeaderText="END" DataFormatString="dd/MM/yyyy" AllowEdit="false" AllowSorting="false"></telerik:GanttBoundColumn>
        <telerik:GanttBoundColumn DataField="PercentComplete" HeaderText="% COMPLETED" AllowEdit="false" AllowSorting="false"></telerik:GanttBoundColumn>
    </Columns>
</telerik:RadGantt>

But displaying "undefined" in column "Description (Desc.)"

Someone help me with this please?

 

Thanks

 

 

[Peter]

Hi Sebastian, 

In order to use a custom Task class, you have to create a custom Provider as described in the documentation you have provided a link for: Custom Tasks Field.