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如何使用COUNT編寫LINQ to SQL?LINQ to SQL C#中的SELECT COUNT#
例子:
var purch = from purchase in myBlaContext.purchases
select purchase;
我怎樣才能得到這裏的計數?
如何使用COUNT編寫LINQ to SQL?LINQ to SQL C#中的SELECT COUNT#
例子:
var purch = from purchase in myBlaContext.purchases
select purchase;
我怎樣才能得到這裏的計數?
就像那個
var purchCount = (from purchase in myBlaContext.purchases select purchase).Count();
或更容易
var purchCount = myBlaContext.purchases.Count()
你應該能夠做到在PURCH變量計數:
purch.Count();
例如
var purch = from purchase in myBlaContext.purchases
select purchase;
purch.Count();
@Bside:'lblCount.Text = myBlaContext.purchases.Count()的ToString()' – 2011-06-13 13:02:47
@George達科特,謝謝。但我得到了錯誤:CS0103:名稱'lblCount'在當前上下文中不存在...並且我在aspx頁面上放置了lblCount ... – Oshrib 2011-06-13 13:07:26
@Bside:根據您放在頁面上的位置,您可能會無法像這樣訪問它。這真是一個單獨的問題:如何在asp.net頁面上訪問控件。請參閱http://msdn.microsoft.com/en-us/library/ms178509(v=vs.90).aspx – 2011-06-13 13:11:01