} // end ctr
//-
#endregion
#region // Public Methods
//------------------------
/// <summary>
/// Adds a namespace element as child to a namespace element
/// </summary>
/// <param name="aChild">Child to be added. Checks if the child provided is a <see cref="DaAddressSpaceElement"/></param>
/// <returns>
/// <line>true - Child successfully. </line>
/// <line>false - Child was not added. If fails, the Child should be released by the user.</line>
/// </returns>
/// <include
/// file='TBNS.doc.xml'
/// path='//class[@name="DaAddressSpaceElement"]/
/// method[@name="AddChild"]/doc/*'
/// />
public override bool AddChild(AddressSpaceElement aChild)
{
if (!HasChildren)
{
Application.Instance.Trace(
EnumTraceLevel.WRN, EnumTraceGroup.OPCSERVER,
"DaAddressSpaceElement.AddChild", "This element does not allow childred");
return false;
} // end if
DaAddressSpaceElement child = aChild as DaAddressSpaceElement;
if (child == null)
{
Application.Instance.Trace(
EnumTraceLevel.WRN, EnumTraceGroup.OPCSERVER,
"DaAddressSpaceElement.AddChild", "Invalid child provided");
return false;
} // end if
// only add the child if no handle assigned
if (child.ObjectHandle == 0)
{
OTSAddressSpaceElementData data = new OTSAddressSpaceElementData();
data.m_name = Marshal.StringToCoTaskMemUni(child.Name);
data.m_itemID = Marshal.StringToCoTaskMemUni(
Name + Application.Instance.AddressSpaceDelimiter + child.Name);
data.m_accessRights = (byte) child.AccessRights;
data.m_ioMode = (byte) child.IoMode;
data.m_datatype = ValueQT.GetVartype(child.Datatype);
data.m_hasChildren = Convert.ToByte(child.HasChildren);
data.m_isBrowsable = Convert.ToByte(child.IsBrowsable);
data.m_elementType = (byte) EnumAddressSpaceElementType.DA;
data.m_userData = child.UserData;
Application.Instance.DaAddressSpaceRoot.AddElementToArray(child);
int result = OTBFunctions.OTSAddAddressSpaceElement(m_objectHandle, data, out child.m_objectHandle);
Marshal.FreeCoTaskMem(data.m_name);
Marshal.FreeCoTaskMem(data.m_itemID);
if (!ResultCode.SUCCEEDED(result))
{
result = Application.Instance.DaAddressSpaceRoot.RemoveElementFromArray(child);
System.Diagnostics.Debug.Assert(ResultCode.SUCCEEDED(result),
"RemoveElementFromArray has failed");
return false;
} // end if ... else
}
else
{
Application.Instance.DaAddressSpaceRoot.AddElementToArray(child);
} // end if ... else
// end if
return base.AddChild(aChild);
} // end AddChild