public void DefineMatxt(DbElement cata)
{
DbElement sect = cata.Members().SingleOrDefault(s => s.GetString(DbAttributeInstance.DESC) == "MaterialContainer");
if (sect == null || sect.IsValid == false)
{
sect = cata.CreateLast(DbElementTypeInstance.SECTION);
sect.SetAttributeValue(DbAttributeInstance.DESC, "MaterialContainer");
}
var smtes = new DBElementCollection(sect,
new AndFilter(new TypeFilter(DbElementTypeInstance.SMTEXT),
new AttributeStringFilter(DbAttributeInstance.MTXX, FilterOperator.Equals, Matxt)));
var smte = smtes.First();
if (smte == null || !smte.IsValid)
{
smte = sect.CreateFirst(DbElementTypeInstance.SMTEXT);
smte.SetAttribute(DbAttributeInstance.XTEX, Matxt);
}
Smte = smte;
}