等效的LINQ to SQL代码

Question

这里的新手是我的T-SQL

SELECT category.id, category.name,COUNT(job.id) AS countofjobs 
FROM category 
LEFT OUTER JOIN job ON category.id = job.categoryid AND job.active=1 
WHERE category.featured=1 
GROUP BY category.id, category.name
ORDER BY category.name

什么是等效的LINQ to SQL代码？任何帮助将不胜感激

对不起,我忘了提到数据库方面没有关系,表格中没有任何关联在db中定义,这就是主要问题,这实际上只是示例sql,看看如何编写链接到SQL for T-SQL,需要:左外连接,外连接表记录和排序

Answer 1

var result = dataContext.Categories
                  .Where(c => c.Featured)
                  .OrderBy(c => c.Name)
                  .Select(c => new { c.Id, 
                                     c.Name, 
                                     CountOfJobs = c.Jobs.Count(j => j.Active) };

或者:

var result = from c in dataContext.Categories
             where c.Featured
             orderby c.Name
             select new { c.Id, c.Name, CountOfJobs = c.Jobs.Count(j => j.Active) };