Knight Data Access Layer
LoadByColumn<T> Method (IDataHelper)
Example 




KellermanSoftware.NetDataAccessLayer Namespace > IDataHelper Interface : LoadByColumn<T> Method
Generic class type
Where column name
Where column value
Load records based on a column into a class list
Syntax
Function LoadByColumn(Of T As {Class, New})( _
   ByVal columnName As String, _
   ByVal columnValue As Object _
) As List(Of T)
Dim instance As IDataHelper
Dim columnName As String
Dim columnValue As Object
Dim value As List(Of T)
 
value = instance.LoadByColumn(Of T)(columnName, columnValue)
List<T> LoadByColumn<T>( 
   string columnName,
   object columnValue
)
where T: class, new()
List<T*>* LoadByColumn<T>( 
   string* columnName,
   Object* columnValue
) 
where T: ref class, gcnew()
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
Example
//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();
'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()
Requirements

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

See Also

Reference

IDataHelper Interface
IDataHelper Members