Initial commit

SW/llblgen/clsDBInteractionBase.vb

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+Imports System
+Imports System.Configuration
+Imports System.Data
+Imports System.Data.SqlClient
+Imports System.Data.SqlTypes
+
+Namespace DB
+	Public Enum LLBLError
+		AllOk
+		' // Add more here (check the comma's!)
+	End Enum
+
+
+	Public Interface ICommonDBAccess
+		Function	Insert() As Boolean
+		Function	Update() As Boolean
+		Function	Delete() As Boolean
+		Function	SelectOne() As DataTable
+		Function	SelectAll() As DataTable
+	End Interface
+
+
+	Public MustInherit Class clsDBInteractionBase
+		Implements IDisposable
+		Implements ICommonDBAccess
+
+#Region " Class Member Declarations "
+
+		Protected	m_scoMainConnection As SqlConnection
+		Protected	m_iRowsAffected As Integer
+		Protected	m_iErrorCode As SqlInt32
+		Protected	m_bMainConnectionIsCreatedLocal As Boolean
+		Protected	m_cpMainConnectionProvider As clsConnectionProvider
+		Private		m_sConnectionString As String
+		Private		m_bIsDisposed As Boolean
+
+#End Region
+
+
+		Public Sub New()
+			' // Initialize the class' members.
+			InitClass()
+		End Sub
+
+
+		Private Sub InitClass()
+			' // create all the objects and initialize other members.
+			m_scoMainConnection = new SqlConnection()
+			m_bMainConnectionIsCreatedLocal = True
+			m_cpMainConnectionProvider = Nothing
+			m_iErrorCode = New SqlInt32(LLBLError.AllOk)
+			m_bIsDisposed = False
+		End Sub
+
+
+		Overloads Public Sub Dispose() Implements IDisposable.Dispose
+			Dispose(True)
+			GC.SuppressFinalize(Me)
+		End Sub
+
+
+		Overridable  Overloads Protected Sub Dispose(ByVal bIsDisposing As Boolean)
+			' // Check to see if Dispose has already been called.
+			If Not m_bIsDisposed Then
+				If bIsDisposing Then
+					' // Dispose managed resources.
+					If m_bMainConnectionIsCreatedLocal Then
+						' // Object is created in this class, so destroy it here.
+						m_scoMainConnection.Close()
+						m_scoMainConnection.Dispose()
+						m_bMainConnectionIsCreatedLocal = True
+					End If
+					m_cpMainConnectionProvider = Nothing
+					m_scoMainConnection = Nothing
+				End If
+			End If
+			m_bIsDisposed = True
+		End Sub
+
+
+		Public Overridable Function Insert() As Boolean Implements ICommonDBAccess.Insert
+			' // No implementation, throw exception
+			Throw New NotImplementedException()
+		End Function
+
+
+		Public Overridable Function Delete() As Boolean Implements ICommonDBAccess.Delete
+			' // No implementation, throw exception
+			Throw New NotImplementedException()
+		End Function
+
+
+		Public Overridable Function Update() As Boolean Implements ICommonDBAccess.Update
+			' // No implementation, throw exception
+			Throw New NotImplementedException()
+		End Function
+
+
+		Public Overridable Function SelectOne() As DataTable Implements ICommonDBAccess.SelectOne
+			' // No implementation, throw exception
+			Throw New NotImplementedException()
+		End Function
+
+
+		Public Overridable Function SelectAll() As DataTable Implements ICommonDBAccess.SelectAll
+			' // No implementation, throw exception
+			Throw New NotImplementedException()
+		End Function
+
+
+#Region " Class Property Declarations "
+
+		Public WriteOnly Property cpMainConnectionProvider() As clsConnectionProvider
+			Set(ByVal Value As clsConnectionProvider)
+				If Value Is Nothing Then
+					' // Invalid value
+					Throw New ArgumentNullException("cpMainConnectionProvider", "Nothing passed as value to this property which is not allowed.")
+				End If
+
+				' // A connection provider object is passed to this class.
+				' // Retrieve the SqlConnection object, if present and create a
+				' // reference to it. If there is already a MainConnection object
+				' // referenced by the membervar, destroy that one or simply 
+				' // remove the reference, based on the flag.
+				If Not (m_scoMainConnection Is Nothing) Then
+					' // First get rid of current connection object. Caller is responsible
+					If m_bMainConnectionIsCreatedLocal Then
+						' // Is local created object, close it and dispose it.
+						m_scoMainConnection.Close()
+						m_scoMainConnection.Dispose()
+					End If
+					' // Remove reference.
+					m_scoMainConnection = Nothing
+				End If
+				m_cpMainConnectionProvider = CType(Value, clsConnectionProvider)
+				m_scoMainConnection = m_cpMainConnectionProvider.scoDBConnection
+				m_bMainConnectionIsCreatedLocal = False
+			End Set
+		End Property
+
+
+		Public ReadOnly Property iErrorCode() As SqlInt32
+			Get
+				Return m_iErrorCode
+			End Get
+		End Property
+
+
+		Public Property sConnectionString() As String
+			Get
+				Return m_sConnectionString
+			End Get
+			Set (ByVal Value As String)
+				m_sConnectionString = Value
+				m_scoMainConnection.ConnectionString = m_sConnectionString
+			End Set
+		End Property
+		Public Readonly Property iRowsAffected() As Integer
+			Get
+				Return m_iRowsAffected
+			End Get
+		End Property
+
+#End Region
+
+	End Class
+End Namespace