Cela devrait vous permettre de continuer sur le côté restauration:
void LoadDB(
System.Data.Entity.DbContext context,
string backup_filename,
string orig_mdf, // the original LogicalName name of the data (also called the MDF) file within the backup file
string orig_ldf, // the original LogicalName name of the log (also called the LDF) file within the backup file
string new_database_name
)
{
var database_dir = System.IO.Path.GetTempPath();
var temp_mdf = $"{database_dir}{new_database_name}.mdf";
var temp_ldf = $"{database_dir}{new_database_name}.ldf";
var query = @"RESTORE DATABASE @new_database_name FROM DISK = @backup_filename
WITH MOVE @orig_mdf TO @temp_mdf,
MOVE @orig_ldf TO @temp_ldf,
REPLACE;";
context.Database.ExecuteSqlCommand(
// Do not use a transaction for this query so we can load without getting an exception:
// "cannot perform a backup or restore operation within a transaction"
TransactionalBehavior.DoNotEnsureTransaction,
query,
new[] {
new SqlParameter("@backup_filename", backup_filename),
new SqlParameter("@database_dir", database_dir),
new SqlParameter("@new_database_name", new_database_name),
new SqlParameter("@orig_mdf", orig_mdf),
new SqlParameter("@orig_ldf", orig_ldf),
new SqlParameter("@temp_mdf", temp_mdf),
new SqlParameter("@temp_ldf", temp_ldf),
}
);
}
Si vous ne les connaissez pas à l'avance , les valeurs MDF et LDF LogicalName peuvent être obtenues manually ou programmatically à partir d'une requête comme celle-ci:
RESTORE FILELISTONLY FROM DISK @backup_filename