我想知道如果在表中不存在记录,是否有更简单的方法来插入记录.我还在尝试构建我的LINQ to SQL技能.
这就是我所拥有的,但似乎应该有一种更简单的方法.
public static TEntity InsertIfNotExists<TEntity>
(
DataContext db,
Table<TEntity> table,
Func<TEntity,bool> where,
TEntity record
)
where TEntity : class
{
TEntity existing = table.SingleOrDefault<TEntity>(where);
if (existing != null)
{
return existing;
}
else
{
table.InsertOnSubmit(record);
// Can't use table.Context.SubmitChanges()
// 'cause it's read-only
db.SubmitChanges();
}
return record;
}
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