RecordExists(String) Method

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

Public Overloads Overridable Function RecordExists( _
   ByVal sql As String _
) As Boolean

Dim instance As DataHelper
Dim sql As String
Dim value As Boolean
 
value = instance.RecordExists(sql)

public virtual bool RecordExists( 
   string sql
)

public: virtual bool RecordExists( 
   string* sql
)

public:
virtual bool RecordExists( 
   String^ sql
)

Parameters

sql: The SQL to execute

Return Value

True if one ore more records exist

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);
 
string sql = "select * from persons";
 
bool exists = db.RecordExists(sql);
 
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)
 
Dim sql As String = "select * from persons"
 
Dim exists As Boolean = db.RecordExists(sql)
 
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
Overload List