Codigo Conexion Base Datos

Modulo conexión

Imports System.Data.SqlClient

Module Conexion

Public Class Conexion1

Public cnn As New SqlConnection

Public Function Conectado()

Try

cnn = New SqlConnection("Data Source=A-3\SQLEXPRESS;Initial Catalog=Tienda;Integrated Security=true")

cnn.Open()

Return True

Catch ex As Exception

MsgBox(ex.Message)

Return False

End Try

End Function

Public Function desconectado()

Try

If cnn.State = ConnectionState.Connecting = True Then

cnn.Close()

Return True

Else

Return False

End If

Catch ex As Exception

MessageBox.Show(ex.Message)

Return False

End Try

End Function

End Class

End Module

--Modulo de datos

Module datos

Public Class datos1

Dim clav As String

Dim prod As String

Dim prov As String

Dim clasif As String

Dim cant As String

Dim prec As String

Dim exis As String

Public Property gclav()

Get

Return clav

End Get

Set(ByVal value)

clav = value

End Set

End Property

Public Property gprod()

Get

Return prod

End Get

Set(ByVal value)

prod = value

End Set

End Property

Public Property gclasif()

Get

Return clasif

End Get

Set(ByVal value)

clasif = value

End Set

End Property

Public Property gprov()

Get

Return prov

End Get

Set(ByVal value)

prov = value

End Set

End Property

Public Property gcant()

Get

Return cant

End Get

Set(ByVal value)

cant = value

End Set

End Property

Public Property gprec()

Get

Return prec

End Get

Set(ByVal value)

prec = value

End Set

End Property

Public Property gexis()

Get

Return exis

End Get

Set(ByVal value)

exis = value

End Set

End Property

Public Sub New(ByVal clav As String, ByVal prod As String, ByVal prov As String, ByVal clasif As String, ByVal cant As String, ByVal prec As String, ByVal exis As String)

gclav = clav

gprov = prov

gprod = prod

gclasif = clasif

...