TUTORIAL UTILISATION SQLITE AVEC VISUAL BASIC NET 2010 EXPRESS

Imports System.Data.SQLite
Imports System.IO
Module modSQLITE
    Public Database As String
    Dim CON As New SQLiteConnection
    '
    Public Sub OpenDataBase()
        Try
            CON.ConnectionString = "Data Source=" & DataBase
            CON.Open()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub
    '
    Public Sub CloseDatabase()
        CON.Close()
    End Sub
    Public Structure m_INDIVIDU
        Dim ID As Integer
        Dim Nom As String
        Dim Age As Integer
        Dim Membre As Boolean
        Dim Photo As Image
        Public Sub New(ByVal Idx As Integer)
            ID = Idx
            Nom = ""
            Age = 0
            Membre = False
            Photo = New Bitmap(10, 10) 'on initialise avec une image quelconque
        End Sub
    End Structure
    Public Sub DBaddINDIVIDU(ByVal INDIVIDU As m_INDIVIDU)
        Try
            Dim strSQL As String = "INSERT INTO INDIVIDU VALUES (@ID,@Nom,@Age,@Membre,@Photo)"
            Dim cmd = New SQLiteCommand(strSQL, CON)
            cmd.Parameters.AddWithValue("@ID", INDIVIDU.ID)
            cmd.Parameters.AddWithValue("@Nom", INDIVIDU.Nom)
            cmd.Parameters.AddWithValue("@Age", INDIVIDU.Age)
            cmd.Parameters.AddWithValue("@Membre", INDIVIDU.Membre)
            cmd.Parameters.AddWithValue("@Photo", ImageToByteArray(INDIVIDU.Photo))
            cmd.ExecuteNonQuery()
            cmd.Dispose()
        Catch ex As Exception
            MessageBox.Show(ex.message)
        End Try
    End Sub

    Public Sub DBupdateINDIVIDU(ByVal INDIVIDU As m_INDIVIDU)
        Try
            Dim strSQL As String = "UPDATE INDIVIDU SET Nom=@Nom,Age=@Age,Membre=@Membre,Photo=@Photo WHERE ID=@ID"
            Dim cmd = New SQLiteCommand(strSQL, CON)
            cmd.Parameters.AddWithValue("@ID", INDIVIDU.ID)
            cmd.Parameters.AddWithValue("@Nom", INDIVIDU.Nom)
            cmd.Parameters.AddWithValue("@Age", INDIVIDU.Age)
            cmd.Parameters.AddWithValue("@Membre", INDIVIDU.Membre)
            cmd.Parameters.AddWithValue("@Photo", ImageToByteArray(INDIVIDU.Photo))
            cmd.ExecuteNonQuery()
            cmd.Dispose()
        Catch ex As Exception
            MessageBox.Show(ex.message)
        End Try
    End Sub

    Public Function DBgetINDIVIDU(ByVal Idx As Integer) As m_INDIVIDU
        Dim strSQL As String = "SELECT * FROM INDIVIDU WHERE ID= " & idx
        Dim INDIVIDU As New m_INDIVIDU
        Dim cmd = New SQLiteCommand(strSQL, CON)
        Dim DR As SQLiteDataReader = cmd.ExecuteReader
        '
        While (DR.Read())
            INDIVIDU.ID = DR(0)
            INDIVIDU.Nom = DR(1)
            INDIVIDU.Age = DR(2)
            INDIVIDU.Membre = DR(3)
            INDIVIDU.Photo = ByteArrayToImage(DR(4))
        End While
        DR.Close()
        cmd.Dispose()
        Return INDIVIDU
    End Function

    Public Sub DBdeleteINDIVIDU(ByVal Idx As Integer)
        Dim strSQL As String = "DELETE FROM INDIVIDU WHERE ID= " & idx
        Dim cmd = New SQLiteCommand(strSQL, CON)
        cmd.ExecuteNonQuery()
        cmd.Dispose()
    End Sub

    Public Function DBNewIndexINDIVIDU() As Integer
        Dim NewID As Integer = 1
        Dim cmd = New SQLITECommand("SELECT MAX(ID) FROM INDIVIDU", CON)
        Try
            Dim DR As SQliteDataReader = cmd.ExecuteReader
            While (DR.Read())
                NewID = DR(0)
            End While
            DR.Close()
            Return NewID + 1
        Catch ex As Exception
            Return NewID
        End Try
    End Function

    Public Sub DBremplirListe(ByRef LST As ListBox) 'remarquez le ByRef
        Dim cmd = New SQLiteCommand("SELECT ID,Nom FROM INDIVIDU", CON)
        Dim DR As SQLiteDataReader = cmd.ExecuteReader
        LST.Items.Clear()
        While (DR.Read())
            'DR(1) est le nom DR(0) est ID
            LST.Items.Add(DR(1) & "    |" & DR(0))
        End While
        DR.Close()
    End Sub
    '------------
    Public Function ImageToByteArray(ByVal img As Image) As Byte()
        Dim stream As New MemoryStream
        img.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg)
        Return stream.ToArray
    End Function

    Public Function ByteArrayToImage(ByVal ByteArray As Byte()) As Image
        Dim stream As New MemoryStream(ByteArray, 0, ByteArray.Length)
        Return Image.FromStream(stream, True)
    End Function
End Module