Not sure I entirley understand your question, but here is an example of a data type using the abstractdataeditor that works:

public class MemberGroupPickerDataType : AbstractDataEditor
    {
        protected MemberGroupPickerControl _control = new MemberGroupPickerControl();

        public MemberGroupPickerDataType()
        {
            _control.Init += new EventHandler(control_Init);

            RenderControl = _control;

            DataEditorControl.OnSave += new AbstractDataEditorControl.SaveEventHandler(DataEditorControl_OnSave);
        }

        public override Guid Id
        {
            get
            {
                return new Guid("bdbe818d-e088-4caa-9cb8-087494ce73ae");
            }
        }

        public override string DataTypeName
        {
            get
            {
                return "Member Group Picker";
            }
        }

        protected void control_Init(object sender, EventArgs e)
        {
            _control.InitValue = base.Data.Value as string;
        }

        protected void DataEditorControl_OnSave(EventArgs e)
        {
            base.Data.Value = _control.SelectedValue;
        }
    }

    public class MemberGroupPickerControl : DropDownList
    {
        public string InitValue { get; set; }

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);

            DataSource = Roles.GetAllRoles();
            DataBind();

            Items.Insert(0, new ListItem(ui.Text("choose") + "...", ""));

            if (!string.IsNullOrEmpty(InitValue))
                SelectedValue = InitValue;
        }
    }

Matt

Hi Ismail,

As far as I can tell, you'll need to override the PrevalueEditor in your AbstractDataEditor-derived class...

My_PrevalueEditor m_PreValues;

public override IDataPrevalue PrevalueEditor
{
    get
    {
        if (m_PreValues == null)
        {
            m_PreValues = new My_PrevalueEditor(this);
        }

        return m_PreValues;
    }
}

Your PrevalueEditor needs to implement the IDataPrevalue interface... then you can set the DBType of the BaseDataType, (to NText).

Then you can override the Data (of your AbstractDataEditor-derived class) to use a custom DefaultData class - as Tim shows in his blog post.

Making these customisations seems to take away from the abstraction, but I'm not sure of another way to do it.

Good luck, and let us know how you get on.

Cheers, Lee.

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