FILTRAR LOS DATOS DE LA BASE DE DATOS EN VISUAL.NET
En esta aplicacion filtraremos los datos de una tabla desde visual estudio.
FORMULARIO
Private Sub cargar_combo(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load, Button2.Click
Dim obj As New RN_productos
Dim datos As New DataTable
datos = obj.RN_leer_todos_prodcutos
DataGridView1.DataSource = datos
obj = Nothing
Dim obj2 As New Rn_marcas
Dim datos2 As New DataTable
datos2 = obj2.RN_leer_todas_marcas
With Cbo_marcas
.DataSource = datos2
.DisplayMember = "marca"
.ValueMember = "id_marca"
End With
End Sub
………………………………………………………………….
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim obj As New RN_productos
Dim datos As New DataTable
datos = obj.RN_productos_xmarcas(Cbo_marcas.SelectedValue)
DataGridView1.DataSource = datos
obj = Nothing
End Sub
..............................................
en la capa datos
Imports System.Data.SqlClient
Public Class BD_productos
Public Function BD_leer_todos_productos() As DataTable
Dim cn As New SqlConnection
Try
cn.ConnectionString = solo_conexion()
Dim da As New SqlDataAdapter("sp_listar_productos", cn)
Dim datos As New DataTable
da.Fill(datos)
da = Nothing
Return datos
Catch ex As Exception
Return Nothing
End Try
End Function
Public Function BD_productos_xmarcas(ByVal xidmarcas As Integer)
Dim cn As New SqlConnection
Try
cn.ConnectionString = solo_conexion()
Dim da As New SqlDataAdapter("sp_productosxmarca", cn)
da.SelectCommand.CommandType = CommandType.StoredProcedure
da.SelectCommand.Parameters.AddWithValue("@id_marca ", xidmarcas)
Dim DT As New DataTable
da.Fill(DT)
Return DT
Catch ex As Exception
Return Nothing
End Try
End Function
Public Function BD_filtrar_productos(ByVal xproducto As String, ByVal xid_marca As Integer) As DataTable
Dim cn As New SqlConnection
Try
cn.ConnectionString = solo_conexion()
Dim da As New SqlDataAdapter("sp_filtrar_productos", cn)
da.SelectCommand.CommandType = CommandType.StoredProcedure
da.SelectCommand.Parameters.AddWithValue("@prod", xproducto)
da.SelectCommand.Parameters.AddWithValue("@id_marca", xid_marca)
Dim datos As New DataTable
da.Fill(datos)
da = Nothing
cn = Nothing
Return datos
Catch ex As Exception
Return Nothing
CLASE BD MARCAS
Imports System.Data.SqlClient
Public Class Bd_marcas
Public Function BD_cbo_marcas() As DataTable
Dim cn As New SqlConnection
Try
cn.ConnectionString = solo_conexion()
Dim da As New SqlDataAdapter("sp_listar_marcas", cn)
Dim DT As New DataTable
da.Fill(DT)
Return DT
Catch ex As Exception
Return Nothing
End Try
End Function
End Class
EN LA CAPA NEGOCIO
Imports Prj_capa_Datos
Public Class RN_productos
Public Function RN_leer_todos_prodcutos() As DataTable
Dim cn As New BD_productos
Return cn.BD_leer_todos_productos
End Function
Public Function RN_productos_xmarcas(ByVal xmarck As Integer) As DataTable
Dim cn As New BD_productos
Return cn.BD_productos_xmarcas(xmarck)
End Function
Public Function RN_filtrar_productos(ByVal xprod As String, ByVal xidmarca As Integer) As DataTable
Dim obj As New BD_productos
Return obj.BD_leer_todos_productos
End Function
End Class
-_______________________________________________________
CLASE RN MARCAS
Public Class Rn_marcas
Public Function RN_leer_todas_marcas() As DataTable
Dim chio As New Bd_marcas
Return chio.BD_cbo_marcas
End Function
__________________________________________________________________________________________________
