无法将类型'System.Linq.IQueryable <Database.Table>'隐式转换为'bool'

Question

您好我收到错误

Cannot implicitly convert type 'System.Linq.IQueryable<Database.Table>' to 'bool'

从这段代码

foreach (var file in files)
{
  if (context.SomeTables.Where(p => p.FileName == System.IO.Path.GetFileName(file)))
  {
      //Do Something     //above I am trying to compare if the filename in the db table
                         //is equal to the GetFileName being passed in but it throwing
                         //the error      
  }

Answer 1

context.SomeTables.Where(p => p.FileName == System.IO.Path.GetFileName(file))

返回一个IQueryable,而不是一个bool.你需要能够返回的东西bool,比如

context.SomeTables.Any(p => p.FileName == System.IO.Path.GetFileName(file)) 

作为if陈述的条件.

请参见
Enumerable.Any方法(IEnumerable)