为IQueryable创建动态类型 <T> 在＃中运行时

Question

I'm developing a multilingual news portal website using asp.net and c#. Currently the site supports two languages and it will be extended to other additional languages when required. So it is my job to create the basic framework for the site. Based on the client requirements,the content to be stored in the database for the website for the different languages may be different. So, I have created different tables to store the News in different languages (like tblNews_EN, tblNews_am, etc) to store content for Enlish or Amharic languages.

Now I have classes to retrieve the latest news but I want to generalize those classes and retrieve the latest news for the specific culture being requested by the user. Initially I have something like the following which only work to retrieve latest news from the tblNews_EN table.

public IQueryable<GetNews> GetTopExtraNews()
 {

        var topExtraNews = from p in db.GetNews
                           where p.TopOrderPriority == 2
                           orderby p.NewsDate descending
                           select p;
        return topExtraNews;
}

Here GetNews is my Entity class that corresponds to the tblNews_EN table.

Now I want to generalize this one so that it will return objects from different tables depending on the culture selected. I tried to use something like IQueryable but I dont think this is the best option to deal with my case. So, is there any better option to do this?

Answer 1

If I understood well all of your tables have the same structure.

Based on that just send the table as a parameter to your method and use this parameter to your query:

public IQueryable<GetNews> GetTopExtraNews(typeofYourTable myTable)
{

        var topExtraNews = from p in myTable
                           where p.TopOrderPriority == 2
                           orderby p.NewsDate descending
                           select p;
        return topExtraNews;
}

Of course you have to set the myTable parameter to the correct language table before calling your method.