Novice somewaht in OO 
I want to create a class that returns a typed dataset DataSetPastDue
So I strat with
public class PastDueTables : DataSetPastDue {//Then the constructor takes a prameter
public
PastDueTables(string PlantCode) {and the code starts with
DataSetPastDue
MyDataset = new DataSetPastDue();and contiues to add data in the tables of the MyDataset
when done I thought I could issue
return
MyDataset; but the compiler complains Error 1 Since 'WebServiceS5.PastDueTables.PastDueTables(string)' returns void, a return keyword must not be followed by an object expressiontried this=MyDataset; it tells me that this is read only.
SO how do I get my result data set back from the constructor
how do I get my result data set back from the constructor?
darklightred
I guess any method in any class that will return the results in a dataset typed like DataSetPastDue will due.
I was just trying to learn how to construct a class to be a knowen type.
Mohsen Kokabi
Danny Tuppeny
The DataSetPastDue MyDataset = new DataSetPastDue(); is very strange
The fact that your PastDueTables inherits from DataSetPastDue, the DataSetPastDue contructor will be called before your PastDueTables constructor.
The proper way to do this is to expose a protected method in DataSetPastDue to allow add data, for instance AddRow, then, in the PastDueTables constructor, just call this.AddRow to add data.
dtsn
Given that a constructor is incapable of returning anything in the same way that a regular method can, one option would be to add an extra parameter to the constructor with the out keyword, a parameter whose value would be set within the constructor and then made available externally:
The constructor would look like:
public class PastDueTables : DataSetPastDue
{
public PastDueTables(string PlantCode, out DataSetPastDue pastDue)
{
DataSetPastDue MyDataset = new DataSetPastDue();
pastDue = MyDataset;
}
}
While the caller would be:
DataSetPastDue pastDueData;
PastDueTables pdt = new PastDueTables("Some Plant", out pastDueData);
//pastDueData now has a value;
Are you doing anything more with the instance of the PastDueTables class after you create it If so... perhaps the gathering of the data should be pushed off to a separate method that can return the type you want.
ckrepps
This ends up being the same as NOT inheretinting the class from DataSetPastDue
My Idea was to use the class as in a line like:
DataSetPastDue pastDueData = new PastDueTables("Some Plant");
My Problem is that inside the class I don't know the syntax to make it return the inhereted type.