private void insertPrevalueEditor()
        {
            try
            {
                if (ddlRenderControl.SelectedIndex >= 0)
                {
                    interfaces.IDataType o = f.DataType(new Guid(ddlRenderControl.SelectedValue));

                    o.DataTypeDefinitionId = dt.Id;
                    _prevalue = o.PrevalueEditor;

                    if (o.PrevalueEditor.Editor != null)
                        plcEditorPrevalueControl.Controls.Add(o.PrevalueEditor.Editor);
                }
                else
                {
                    plcEditorPrevalueControl.Controls.Add(new LiteralControl("No editor control selected"));
                }
            }
            catch { }

        }
        private void insertPrevalueEditor()
        {
            try
            {
                if (ddlRenderControl.SelectedIndex >= 0)
                {
                    interfaces.IDataType o = f.DataType(new Guid(ddlRenderControl.SelectedValue));

                    o.DataTypeDefinitionId = dt.Id;
                    _prevalue = o.PrevalueEditor;

                    if (o.PrevalueEditor.Editor != null)
                    {
                        plcEditorPrevalueControl.Controls.Add(o.PrevalueEditor.Editor);
                    }
                }
                else
                {
                    plcEditorPrevalueControl.Controls.Add(new LiteralControl("No editor control selected"));
                }
            }
            catch { }
        }