我正在使用實體框架4從數據庫中檢索數據,然後將其顯示在WPF DataGrid中的應用程序。我檢索數據是這樣的:LINQ查詢 - 動態PIvot日期
SCHEMATIC_ID SERIAL_NUM OUTAGE_DATE POSITION COMMENTS
1G1111G111G1 1199 4/17/2003 10 Filler
1G1111G111G1 1199 5/21/2004 10 Filler
1G1111G111G2 1962 4/17/2003 3 Filler
1G1111G111G2 1962 5/21/2004 3 Filler
1G1111G111G1 2017 5/21/2004 9 Filler
1G1111G111G1 226 5/21/2004 8
1G1111G111G1 290 5/21/2004 6
1G1111G111G1 291 5/21/2004 5
1G1111G111G1 295 5/21/2004 1
1G1111G111G1 65450 5/21/2004 3
1G1111G111G1 65451 5/21/2004 9 Filler
1G1111G111G1 65453 5/21/2004 6 Filler
1G1111G111G1 65458 4/17/2003 6
1G1111G111G1 65458 5/21/2004 6
1G1111G111G1 65459 5/21/2004 7
我需要讓日期變成一個動態的列標題(我不知道日期會有數)和下位置下降到透視數據每個SN /原理圖的日期。它應該是這樣的:
SCHEMATIC_ID SERIAL_NUM 4/17/2003 5/21/2004 COMMENTS
1G1111G111G1 1199 10 10 Filler
1G1111G111G2 1962 3 3 Filler
1G1111G111G1 2017 9 Filler
1G1111G111G1 226 8
1G1111G111G1 290 6
1G1111G111G1 291 5
1G1111G111G1 295 1
1G1111G111G1 65450 3
1G1111G111G1 65451 9 Filler
1G1111G111G1 65453 6 Filler
1G1111G111G1 65458 6 6
1G1111G111G1 65459 7
我發現在微軟論壇this link但我一直不成功,因爲我真的不明白select語句的內部拉姆達。
這是我一直在從
var query = (from p in context.PARTS_STAGING
where p.TN == SelectedTN
group p by new { p.PART_SERIAL_NUM, p.PART_SCH_NUM, p.COMMENTS } into g
select new PartStaging()
{
SerialNumber = g.Key.PART_SERIAL_NUM,
SchNumber = g.Key.PART_SCH_NUM,
Position = g.GroupBy(f => f.OUTAGE_DATE).Select(m => new { ?? }) // <- This is the part I can't get to work
Comments = g.Key.COMMENTS
});
工作的任何幫助,一定會理解的。