LINQ查詢字典

Question

我想下面的LINQ查詢結果轉換成字典

var browser = (from tbf in context.tblFeedBacks 
         where tbf.email == dboard.userEmail 
         select tbf).GroupBy(l => l.browser) 
         .Select(g => new 
         { 
          browser = g.Key, 
          count = g.Select(l => l.browser).Distinct().Count() 
         }); 

它給了我一個編譯錯誤。

var browser = (from tbf in context.tblFeedBacks 
          where tbf.email == dboard.userEmail 
          select tbf).GroupBy(l => l.browser) 
          .Select(g => new 
          { 
           browser = g.Key, 
           count = g.Select(l => l.browser).Distinct().Count() 
          }).ToDictionary<string, double>(x => x.browser,y=>y.count); 

實例參數：不能轉換從 'System.Linq.IQueryable' 到 'System.Linq.ParallelQuery'

Answer 1

得到它的工作。

var browser = (from tbf in context.tblFeedBacks 
          where tbf.email == dboard.userEmail 
          select tbf).GroupBy(l => l.browser) 
          .Select(g => new 
          { 
           browser = g.Key, 
           count = g.Select(l => l.browser).Count() 
          }).ToDictionary(x => x.browser, x => x.count);