data relationships

Hello

I am creating some relationships in code. I have 3 tables Position, Department, and Employee. The relationship is a one to many for these tables. See the details below.

PositionNames are manager, secretary etc
Position - PositionID (PK), PositionName

Department - DepartmentCode (PK), NameOfDepartment

Employee - EmployeeNo (PK), Name, Address, PositionID(FK), DepartmentCode(FK)

I have created a relation with the department and employee as follows:

Code:

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DataColumn parentColumn = ds.Tables["Department"].Columns["DepartmentCode"];
                                DataColumn childColumn = ds.Tables["Employee"].Columns["DepartmentCode"];                       

                                ds.Relations.Clear();
                                dRelEmployees = new DataRelation("EmployeeDetails",parentColumn,childColumn);
                                ds.Relations.Add(dRelEmployees);

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My problem is l want to add another parent column for the position, do l need to repeat all this code just for the position table. Or can l add another parentColumn and add them all to the dRelEmployees DataSet.

Not sure how to do this.

Thanks in advance,

Steve