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]

Re: Question about some snippets in an article

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

"rodchar" <rodchar@discus sions.microsoft .com> wrote in message
news:A35DB3DE-0574-45AE-B938-C0436F82C548@mi crosoft.com...[color=blue]
> 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[/color]
is[color=blue]
> 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
>
>[/color]

[rodchar]

RE: Question about some snippets in an article

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

"rodchar" wrote:
[color=blue]
> 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
>
>[/color]

[Peter Rilling]

Re: Question about some snippets in an article

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" <rodchar@discus sions.microsoft .com> wrote in message
news:33ECE90D-6A66-485C-A760-0AE404DB95B3@mi crosoft.com...[color=blue]
> why pass a ref of the collection? i understand of the datarow but not the
> collection?
>
> "rodchar" wrote:
>[color=green]
> > 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[/color][/color]
question is[color=blue][color=green]
> > 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[/color][/color]
object[color=blue][color=green]
> > contains a collection object as well?
> >
> > thanks,
> > rodchar
> >
> >[/color][/color]

[rodchar]

Re: Question about some snippets in an article

thanks for the help. in case you're curious:

http://www.microsoft.com/belux/nl/msdn/community/columns/hyatt/ntier2.mspx

Code Snippet 3 & 4 in the article.
rodchar

"Peter Rilling" wrote:
[color=blue]
> 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" <rodchar@discus sions.microsoft .com> wrote in message
> news:33ECE90D-6A66-485C-A760-0AE404DB95B3@mi crosoft.com...[color=green]
> > why pass a ref of the collection? i understand of the datarow but not the
> > collection?
> >
> > "rodchar" wrote:
> >[color=darkred]
> > > 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[/color][/color]
> question is[color=green][color=darkred]
> > > 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[/color][/color]
> object[color=green][color=darkred]
> > > contains a collection object as well?
> > >
> > > thanks,
> > > rodchar
> > >
> > >[/color][/color]
>
>
>[/color]