Question

我有这个SQL查询用于通过电子邮件地址过滤DataSet结果：

SELECT t.[ID]
  ,s.[Email]
  ,[StockSymbol]
  ,[StockID]
  ,[SubscriberID]
  ,[IP]
  ,[App]
  ,[CachedID]
FROM [NoRiba].[dbo].[Transaction] t
JOIN Subscriber s ON t.SubscriberID = s.ID
WHERE s.[Email] LIKE '%SerachString%'

问题是：我想对LINQ查询执行相同的操作，但是下面的WHERE子句不起作用：

 var transactions = (
         from t in db.Transactions
         join s in db.Subscribers on t.SubscriberID equals s.ID
         orderby t.TimeStamp descending                    
         select new { t.TimeStamp, t.StockSymbol, t.StockID, t.SubscriberID, t.IP, t.App, t.CachedID, s.Email })
         .Skip(param.iDisplayStart).Take(param.iDisplayLength);

if (!String.IsNullOrEmpty(param.sSearch))
{
    transactions = transactions.
        Where(s => s.Email.Contains(param.sSearch));
} // This code returns zero rows after executing and searching with any string.

你能指出我在哪里弄错了吗？

Answer 1

问题可能在于字符大小。

string search = param.sSearch.ToLower();

transactions = transactions.Where(s => s.Email.ToLower().Contains(search) || 
                s.Email.ToLower().Contains(search.Replace(" ", String.Empty)));

或者

string search = param.sSearch.ToLower().Replace(" ", String.Empty);

transactions = transactions.Where(s => s.Email.ToLower().Contains(search));

通过电子邮件地址过滤DataSet，LINQ查询无法正常工作

1 个答案: