private void BuscarObra()
 {
     if (DGV1.ColumnCount >= 3)
     {
         if (this.CbTipo.Text != "")
         {
             Tp = this.CbTipo.Text;
         }
         else
         {
             Tp = null;
         }
         if (this.CbElectrico.Text != "")
         {
             El = this.CbElectrico.Text;
         }
         else
         {
             El = null;
         }
         if (this.CbProvincia.Text != "")
         {
             Pv = this.CbProvincia.Text;
         }
         else
         {
             Pv = null;
         }
         this.DGV1.DataSource = NInspeccion.Buscar(this.TbObra.Text, Tp, El, Pv);
         label5.Text          = Convert.ToString(DGV1.Rows.Count);//realiza conteo de filas
     }
 }
 private void Mostrar()
 {
     DGV1.DataSource  = NInspeccion.Mostrar();
     this.label5.Text = Convert.ToString(DGV1.Rows.Count);//realiza conteo de filas
 }