QueryField Collection Methods
In this section, we discuss each QueryField method. The methods are discussed in alphabetical order.
Syntax
First()
Description
The First method returns the first QueryField object in the QueryField collection.
Parameters
None.
Returns
A reference to a QueryField object if successful, NULL otherwise.
Example
&MyQueryField = &MyCollection.First();Syntax
Item(number)
Description
The Item method returns the QueryField object that exists at the number position in the QueryField collection.
Parameters
|
Field or Control |
Definition |
|---|---|
| Number |
Specify the position number in the collection of the QueryField object that you want returned. |
Returns
A reference to a QueryField object if successful, NULL otherwise.
Example
For &I = 1 to &QueryFieldColl.Count;
&MyQueryField = &QueryFieldColl.Item(&I);
/* do processing */
End-For;Syntax
ItemByNameAndAlias(Name, RecordAlias)
Description
The ItemByNameAndAlias method returns the QueryField object with the given Name and Record Alias.
Parameters
|
Field or Control |
Definition |
|---|---|
| Name |
Specify the name of an existing QueryField within the QueryField collection. If you specify an invalid name, the object is NULL. |
| RecordAlias |
Alias of the record to which the field belongs |
Returns
A reference to a QueryField object if successful, NULL otherwise.
Example
&MyQueryField = &MyCollection.ItemByNameAndAlias("PHONELIST", "A");Syntax
ItemByExpNum(ExpNum)
Description
The ItemByExpNum method returns the QueryField object with the given Expression Number, ExpNum.
Parameters
|
Field or Control |
Definition |
|---|---|
| ExpNum |
Expression Number for the given expression field. Non-expression fields have 0 value for the Expression Number. |
Returns
A reference to a QueryField object if successful, NULL otherwise.
Example
&QryFld = &QryFldCol.ItemByExpNum(1);Syntax
Next()
Description
The Next method returns the next QueryField object in the QueryField collection. You can use this method only after you have used the First method: otherwise the system doesn’t know where to start.
Parameters
None.
Returns
A reference to a QueryField object if successful, NULL otherwise.
Example
&MyQueryField = &MyCollection.Next();