(); var dboWeatherForecasts = dbContext.Set<DboWeatherForecast>(); // Check if we already have a full data set // If not clear down any existing data and start again if (dboWeatherForecasts.Count() == 0) dbContext.AddRange(_weatherForecasts); dbContext.SaveChanges(); } private static...
Create<TDerivedEntity>()为此集的类型或派生自此集类型的类型创建新的实体实例。请注意此实例不会添加或附加到此集。如果基础上下文配置为创建代理且实体类型满足创建代理的要求,则返回的实例将是一个代理。 Equals确定指定的 DbSet 是否等于当前 DbSet。 (重写DbQuery<TResult>.Equals(Object)。) ...
(38) Clear about the kind of job for which your’re now applying. College graduates (39) for their first positions often ask " What can I provide in a letter" Employers want to know about your experience. Certainly, a beginner has (40) experience. The answer is that everyt...
我正在尝试根据表名动态检索每个数据库集。 var dynamicdbset = GetDbSetByTableName(uploadTableName); //Dbset name is Mytables private dynamic GetDbSetByTableName(string tableName) { MyEntities context = new MyEntities(); System.Reflection.PropertyInfo[] properties = typeof(ClearGUIEntities).GetPr...
System.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.when explicitly loading navigation property in DbSet<> foreach loop#20041 Closed as not planned Description lauxjpn
adapting his example to Entity Framework Code First and adding a second issue for distracted programmers. If you want his clear explanation I suggest you to go for his post: http://blog.hompus.nl/2010/08/26/joining-an-iqueryable-with-an-ienumerable/ I will start from Michael’s article ...
共用方式為 Facebookx.comLinkedIn電子郵件 列印 發行項 2013/03/01 Question Friday, March 1, 2013 8:22 AM For some reason in this code here is giving me an error, but the method FirstOrDefault works fine in other entities User user = context.Users.FirstOrDefault(u => u.UserName.ToLo...
Clear Cache -IMemoryCache Clear user INPUT after submit (OnPost) Task Client side unobtrusive validation Client side validation not working in bootstrap modal on a partail vew Client Validation Error With Input Fields Containing Currency Values Code First: InvalidOperationException: Unable to resolve ...
(Big thanks to Jeffrey Soper in the comments below for pointing out that my use of param here was not quite clear)(Huge thanks to lsamaha in the comments below for the suggestion to use a lambda in mocking the DbSet’s GetEnumerator!)...
is additive; there is no way to clear flags. The DB->set_flags() method may not be called after the DB->open() method is called. The DB->set_flags() method returns a non-zero error value on failure and 0 on success. Parameters...