private void CarregarTabela()
{
MarcaDB marcaDB = new MarcaDB();
GridView1.DataSource = marcaDB.ConsultarTudo();
GridView1.DataBind();
}
private void CarregarMarca()
{
MarcaDB marcaDB = new MarcaDB();
MarcaDropDownList2.DataSource = marcaDB.ConsultarTudo();
MarcaDropDownList2.DataValueField = "Id";
MarcaDropDownList2.DataTextField = "Descricao";
MarcaDropDownList2.DataBind();
}