Linq 溫故知新
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Linq 溫故知新 Presentation Transcript

  • 1. Linq 溫故知新 Howard 2013/12/13
  • 2. 先來個問題
  • 3. 提示  SelectMany
  • 4. 解答
  • 5. Aggregate
  • 6. Aggregate - Simple  This sample uses Aggregate to create a running product on the array that calculates the total product of all elements.
  • 7. Aggregate - Seed  This sample uses Aggregate to create a running account balance that subtracts each withdrawal from the initial balance of 100, as long as the balance never drops below 0.
  • 8. Deferred Execution  The following sample shows how query execution is deferred until the query is enumerated at a foreach statement.  請問輸出結果是?
  • 9. Immediate Execution  輸出結果如下,該怎麼做?
  • 10. Query Reuse 請問輸出結果是?
  • 11. cross join, inner join, outer join 資料如下:
  • 12. cross join  怎麼做?
  • 13. inner join  怎麼做?
  • 14. outer join  怎麼做?
  • 15. References  http://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b