foreach 中的 SaveChanges()，用于插入 ID

Question

I'm trying to insert inside a foreach and then get the ID inserted to insert this ID in another table (head and detail). And I have 2 foreach inside another. I'm using entity framework.

var remisiones = dbLocal.Database.SqlQuery<datosConsulta>(qDocumento).ToList();
       
foreach (var x in remisiones)
{
    var bcDoc = new bcDocumentos();
    bcDoc.cfecha = Convert.ToDateTime(x.CFECHA);
    dbLocal.bcDocumentos.Add(bcDoc);

    dbLocal.SaveChanges();

    int idBcDocumento = bcDoc.id_documento; // I NEED TO GET THIS ID INSERTED
    
    foreach (var z in movimientos)
    {
        var bcMovs = new bcMovimientos();
        bcMovs.id_documento = idBcDocumento; // TO INSERT HERE IN THE DETAIL TABLE
        dbLocal.bcMovimientos.Add(bcMovs);

        dbLocal.SaveChanges();

        int idBcMovimiento = bcMovs.id_movimiento; // AND THEN GET THE NEW ID FO THE DETAIL
    }
}

Answer 1

If you have specified the id_documento field in the database as Identity , you can use the following code, otherwise change id_documento to Identity.

int idBcDocumento = dbLocal.bcDocumentos.OrderByDescending(p => p.id_documento).First().id_documento;

full code

var remisiones = dbLocal.Database.SqlQuery<datosConsulta>(qDocumento).ToList();
       
foreach (var x in remisiones)
{
    var bcDoc = new bcDocumentos();
    bcDoc.cfecha = Convert.ToDateTime(x.CFECHA);
    dbLocal.bcDocumentos.Add(bcDoc);

    dbLocal.SaveChanges();

    int idBcDocumento = dbLocal.bcDocumentos.OrderByDescending(p => p.id_documento).First().id_documento; // I NEED TO GET THIS ID INSERTED
    
    foreach (var z in movimientos)
    {
        var bcMovs = new bcMovimientos();
        bcMovs.id_documento = idBcDocumento; // TO INSERT HERE IN THE DETAIL TABLE
        dbLocal.bcMovimientos.Add(bcMovs);

        dbLocal.SaveChanges();

        int idBcMovimiento = dbLocal.bcMovs.OrderByDescending(p => p.id_movimiento).First().id_movimiento; // AND THEN GET THE NEW ID FO THE DETAIL
    }
}