LoadByColumn<T> Method (DataHelper)

Visual Basic (Declaration)
Visual Basic (Usage)
C#
Managed Extensions for C++
C++/CLI

Public Overridable Function LoadByColumn(Of T As {Class, New})( _
   ByVal columnName As String, _
   ByVal columnValue As Object _
) As List(Of T)

Dim instance As DataHelper
Dim columnName As String
Dim columnValue As Object
Dim value As List(Of T)
 
value = instance.LoadByColumn(Of T)(columnName, columnValue)

public virtual List<T> LoadByColumn<T>( 
   string columnName,
   object columnValue
)
where T: class, new()

public: virtual List<T*>* LoadByColumn<T>( 
   string* columnName,
   Object* columnValue
) 
where T: ref class, gcnew()

public:
virtual List<T^>^ LoadByColumngeneric<typename T>
( 
   String^ columnName,
   Object^ columnValue
) 
where T: ref class, gcnew()

Parameters

columnName: Where column name
columnValue: Where column value

Type Parameters

T: Generic class type

Return Value

A list of objects

C#

//Get the current thread static safe instance of the helper
IDataHelper db = DataHelper.SessionFactory();
 
//Specify User Name and License Key from the receipt, leave blank for trial mode
//db.UserName = "John Smith 1234";
//db.LicenseKey = "asdfl219==";
 
//Log to the console
db.EnableLogging();
 
//Open the database connection
db.OpenConnection();
 
//Create a new Person to save to the database
Person currentPerson = new Person();
currentPerson.FirstName = "John";
currentPerson.LastName = "Smith";
 
//Save it to the database 
db.Save(currentPerson);
 
//Load records based on a column into a class list
List<Person> personList = db.LoadByColumn<Person>("FirstName", "John");
 
//Close the connection
db.CloseConnection();

VB.NET

'Get the current thread static safe instance of the helper
Dim db As IDataHelper = DataHelper.SessionFactory()
 
'Specify User Name and License Key from the receipt, leave blank for trial mode
'db.UserName = "John Smith 1234"
'db.LicenseKey = "asdfl219=="
 
'Log to the console
db.EnableLogging()
 
'Open the database connection
db.OpenConnection()
 
'Create a new Person to save to the database
Dim currentPerson As New Person()
currentPerson.FirstName = "John"
currentPerson.LastName = "Smith"
 
'Save it to the database 
db.Save(currentPerson)
 
'Load records based on a column into a class list
Dim personList As List(Of Person) = db.LoadByColumn(Of Person)("FirstName", "John")
 
'Close the connection
db.CloseConnection()

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DataHelper Class
DataHelper Members