Question about some snippets in an article

[rodchar]

Code Snippet 1
public class CustomerInfoCol lection : IList
{
private ArrayList m_alCustomerInf o;
private DataSet m_ds;

public CustomerInfoCol lection()
{
m_alCustomerInf o = new ArrayList();
}

public void GetAllCustomers ()
{
// Instantiate a Data Layer class to fill the DataSet
// The specific method will fill a DataTable named "Customers"
// See Part 3 for further details.
DCustomers cust = new DCustomers();
m_ds = cust.SelectAllC ustomers();

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));
}

}
Code Snippet 2

public class CustomerInfo
{
private DataRow m_dr;
private CustomerInfoCol lection m_cic;

public CustomerInfo(Cu stomerInfoColle ction coll, DataRow dr)
{
m_cic = coll;
m_dr = dr;
}

}
These snippets are from an article I'm currently reviewing. I just had a
question about what a certain line of code is doing. The line in question is
as follows:

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));

When instantiating a new CustomerInfo object, it's passing 2 parms:

CustomerInfo(th is, dr)

Does this mean that for each customerinfo object that's added, the object
contains a collection object as well?

thanks,
rodchar

[Peter Rilling]

It contains a "reference" to a collection object (with emphasis on
reference).

"rodchar" <ro*****@discus sions.microsoft .com> wrote in message
news:A3******** *************** ***********@mic rosoft.com...

Code Snippet 1
public class CustomerInfoCol lection : IList
{
private ArrayList m_alCustomerInf o;
private DataSet m_ds;

public CustomerInfoCol lection()
{
m_alCustomerInf o = new ArrayList();
}

public void GetAllCustomers ()
{
// Instantiate a Data Layer class to fill the DataSet
// The specific method will fill a DataTable named "Customers"
// See Part 3 for further details.
DCustomers cust = new DCustomers();
m_ds = cust.SelectAllC ustomers();

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));
}

}
Code Snippet 2

public class CustomerInfo
{
private DataRow m_dr;
private CustomerInfoCol lection m_cic;

public CustomerInfo(Cu stomerInfoColle ction coll, DataRow dr)
{
m_cic = coll;
m_dr = dr;
}

}
These snippets are from an article I'm currently reviewing. I just had a
question about what a certain line of code is doing. The line in question is as follows:

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));

When instantiating a new CustomerInfo object, it's passing 2 parms:

CustomerInfo(th is, dr)

Does this mean that for each customerinfo object that's added, the object
contains a collection object as well?

thanks,
rodchar

[rodchar]

why pass a ref of the collection? i understand of the datarow but not the
collection?

"rodchar" wrote:

Code Snippet 1
public class CustomerInfoCol lection : IList
{
private ArrayList m_alCustomerInf o;
private DataSet m_ds;

public CustomerInfoCol lection()
{
m_alCustomerInf o = new ArrayList();
}

public void GetAllCustomers ()
{
// Instantiate a Data Layer class to fill the DataSet
// The specific method will fill a DataTable named "Customers"
// See Part 3 for further details.
DCustomers cust = new DCustomers();
m_ds = cust.SelectAllC ustomers();

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));
}

}
Code Snippet 2

public class CustomerInfo
{
private DataRow m_dr;
private CustomerInfoCol lection m_cic;

public CustomerInfo(Cu stomerInfoColle ction coll, DataRow dr)
{
m_cic = coll;
m_dr = dr;
}

}
These snippets are from an article I'm currently reviewing. I just had a
question about what a certain line of code is doing. The line in question is
as follows:

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));

When instantiating a new CustomerInfo object, it's passing 2 parms:

CustomerInfo(th is, dr)

Does this mean that for each customerinfo object that's added, the object
contains a collection object as well?

thanks,
rodchar

[Peter Rilling]

Good question. From this amount of code, that is something that I cannot
answer. Normally a hierarchical structure will hold a reference to the
parent object, but I do not know why the collection needs to be held.

"rodchar" <ro*****@discus sions.microsoft .com> wrote in message
news:33******** *************** ***********@mic rosoft.com...

why pass a ref of the collection? i understand of the datarow but not the
collection?

"rodchar" wrote:

Code Snippet 1
public class CustomerInfoCol lection : IList
{
private ArrayList m_alCustomerInf o;
private DataSet m_ds;

public CustomerInfoCol lection()
{
m_alCustomerInf o = new ArrayList();
}

public void GetAllCustomers ()
{
// Instantiate a Data Layer class to fill the DataSet
// The specific method will fill a DataTable named "Customers"
// See Part 3 for further details.
DCustomers cust = new DCustomers();
m_ds = cust.SelectAllC ustomers();

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));
}

}
Code Snippet 2

public class CustomerInfo
{
private DataRow m_dr;
private CustomerInfoCol lection m_cic;

public CustomerInfo(Cu stomerInfoColle ction coll, DataRow dr)
{
m_cic = coll;
m_dr = dr;
}

}
These snippets are from an article I'm currently reviewing. I just had a
question about what a certain line of code is doing. The line in question is as follows:

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));

When instantiating a new CustomerInfo object, it's passing 2 parms:

CustomerInfo(th is, dr)

Does this mean that for each customerinfo object that's added, the object contains a collection object as well?

thanks,
rodchar

[rodchar]

thanks for the help. in case you're curious:
http://www.microsoft.com/belux/nl/ms...tt/ntier2.mspx
Code Snippet 3 & 4 in the article.
rodchar

"Peter Rilling" wrote:

Good question. From this amount of code, that is something that I cannot
answer. Normally a hierarchical structure will hold a reference to the
parent object, but I do not know why the collection needs to be held.

"rodchar" <ro*****@discus sions.microsoft .com> wrote in message
news:33******** *************** ***********@mic rosoft.com...

why pass a ref of the collection? i understand of the datarow but not the
collection?

"rodchar" wrote:

Code Snippet 1
public class CustomerInfoCol lection : IList
{
private ArrayList m_alCustomerInf o;
private DataSet m_ds;

public CustomerInfoCol lection()
{
m_alCustomerInf o = new ArrayList();
}

public void GetAllCustomers ()
{
// Instantiate a Data Layer class to fill the DataSet
// The specific method will fill a DataTable named "Customers"
// See Part 3 for further details.
DCustomers cust = new DCustomers();
m_ds = cust.SelectAllC ustomers();

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));
}

}
Code Snippet 2

public class CustomerInfo
{
private DataRow m_dr;
private CustomerInfoCol lection m_cic;

public CustomerInfo(Cu stomerInfoColle ction coll, DataRow dr)
{
m_cic = coll;
m_dr = dr;
}

}
These snippets are from an article I'm currently reviewing. I just had a
question about what a certain line of code is doing. The line in question is as follows:

// Iterate on all rows and create an Info object per row
foreach (DataRow dr in m_ds.Tables["Customers"].Rows)
m_alCustomerInf o.Add(new CustomerInfo(th is, dr));

When instantiating a new CustomerInfo object, it's passing 2 parms:

CustomerInfo(th is, dr)

Does this mean that for each customerinfo object that's added, the object contains a collection object as well?

thanks,
rodchar