Imports System.IO
Imports System.Data.Sql
Imports System.Data.SqlClient

Public Class DB



    Public dsDaten As New DataSet
    Public dsdaten1 As New DataSet
    Public dsdatendocm As New DataSet
    Public dadaten As SqlDataAdapter
    Public dadatendocm As SqlDataAdapter
    Dim sql As String



    Public Sub Get_Dokumente()
        Try
            dsDaten.Clear()
            sql = "Select * from View_Covid_Mail order by erstelltam desc"
            dadaten = New SqlDataAdapter(sql, Globals.sConnectionstring)
            dadaten.Fill(dsDaten, "Dokumente")
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub

    Public Function Get_From_DB(ByVal DokumentID As String, ByVal Filename As String) As Boolean

        Dim connection As New SqlConnection()
        Dim da As New SqlDataAdapter("Select * From doks where DokumentID='" + DokumentID + "'", connection)
        Dim CB As SqlCommandBuilder = New SqlCommandBuilder(da)
        Dim ds As New DataSet()

        Try
            'Connectionstring zur Datenbank
            connection.ConnectionString = Globals.sConnectionstring
            connection.Open()
            da.Fill(ds, "docs")
            Dim myRow As DataRow
            myRow = ds.Tables(0).Rows(0)
            Dim MyData() As Byte
            MyData = myRow.Item(1)
            Dim K As Long
            K = UBound(MyData)
            Dim fs As New FileStream(Filename, FileMode.OpenOrCreate, FileAccess.Write)
            fs.Write(MyData, 0, K)
            fs.Close()
            fs = Nothing
        Catch ex As Exception
            ' MsgBox(ex.Message)
            Return False
        End Try
        CB = Nothing
        ds = Nothing
        da = Nothing
        connection.Close()
        connection = Nothing
        Return True
    End Function

End Class


Public Class DB_Connection

    ''' <summary>
    ''' Liest sämtlcihe CFG-Dateien mit dem Namen "Vertragsverwaltung...". Sind meherere Dateien vorhanden,
    ''' wird ein Auswahldialog zur Datenbank-Selektion angezeigt.
    ''' Standardmässig wird Vertragsverwaltung.cfg als CFG-Datei benutzt.
    ''' 
    ''' Die CFG-Datei ist verschlüsselt und wird über die Crypto-Funktionen entschlüsselt.
    ''' </summary>
    ''' <remarks></remarks>
    Shared Sub New()
        Dim path As String = ""
        Dim fc As Integer = 0
        If fc < 2 Then Globals.ConnectionFilename = "edokaconn.cfg"
        Dim ofile As System.IO.File
        Dim oread As System.IO.StreamReader

        oread = ofile.OpenText(ApplicationPath() + "\" + Globals.ConnectionFilename)
        sConnectionstring = oread.ReadLine
        sConnectionstring = Crypto.DecryptText(sConnectionstring, "HutterundMueller")
        sConnectionstring = Left(sConnectionstring, Len(sConnectionstring) - 1)
        Globals.sConnectionstring = sConnectionstring
        oread.Close()

        Dim connection As New SqlConnection()
        Dim da As New SqlDataAdapter("Select  beschreibung from pluginparameter where pluginparamnr=1", connection)
        Dim CB As SqlCommandBuilder = New SqlCommandBuilder(da)
        Dim ds As New DataSet()
        Try
            connection.ConnectionString = Globals.sConnectionstring
            connection.Open()
            da.Fill(ds, "params")
            path = ds.Tables(0).Rows(0).Item(0)
        Catch ex As Exception
            path = ""
            CB = Nothing
        End Try

        ds = Nothing
        da = Nothing
        connection.Close()
        connection = Nothing

        Globals.ConnectionFilename = "edokaconn.cfg"
        oread = ofile.OpenText(path + "\" + Globals.ConnectionFilename)
        sConnectionstring = oread.ReadLine
        sConnectionstring = Crypto.DecryptText(sConnectionstring, "HutterundMueller")
        sConnectionstring = Left(sConnectionstring, Len(sConnectionstring) - 1)
        Globals.sConnectionstring = sConnectionstring
        oread.Close()
    End Sub

End Class