我有将实体插入数据库的功能。例如,其中一个看起来像:
public async void InsertInspections(ObservableCollection<Inspections> inspections)
{
_connection.CreateTableAsync<Inspections>().Wait();
foreach (var inspection in inspections)
{
var task = _connection.Table<Inspections>().
Where(v => v.InspectionId == inspection.InspectionId).ToListAsync();
task.Wait();
if (task.Result.Any())
_connection.UpdateAsync(inspection);
else
_connection.InsertAsync(inspection);
}
}
我想将它转换为泛型函数,但我不确定这是在Where
方法中传递lambda函数的最佳方法。
类似的东西:
public async void InsertEntities<T>(ObservableCollection<T> entities)
{
_connection.CreateTableAsync<T>().Wait();
foreach (var entity in entities)
{
var task = _connection.Table<T>().
// what is the best way to pass this function to the method ???
Where(v => v.InspectionId == entity.InspectionId).ToListAsync();
task.Wait();
if (task.Result.Any())
_connection.UpdateAsync(entity);
else
_connection.InsertAsync(entity);
}
}
我应该使用delegates,lambdas还是创建此函数作为Entity类的方法?
答案 0 :(得分:1)
您可以执行以下操作:
InsertEntities<T>(ObservableCollection<T> entities, Func<T, bool> exp)
.Where(exp)
另外,我会阅读上面的评论。我不认为你的异步设置得恰到好处。