private void listViewCategorias_DoubleClick(object sender, EventArgs e)
 {
     if (listViewCategorias.SelectedItems.Count > 0 && listViewCategorias.SelectedItems[0].Tag.ToString() != "todas")
     {
         Form_Categoria formAlt = new Form_Categoria(this, adaptadorCategoria, listViewCategorias.SelectedItems[0]);
         formAlt.ShowDialog();
     }
 }
 private void categoriaToolStripMenuItem_Click(object sender, EventArgs e)
 {
     Form_Categoria Var_Form_Categoria = new Form_Categoria(this, adaptadorCategoria);
     Var_Form_Categoria.ShowDialog();
 }