我有这个sql查询，它给出了正确的结果，即使用order by子句按A到Z排序的员工的所有名称
select Distinct(EmpNTLogin),Employee from Attendance
where CreateDate>='2016-01-01'
order by EmpNTLogin
当我在Linq中转换相同的查询时，我得到了正确的结果，但order by子句不起作用。 这是我的Linqued查询
var query = (from attendance in db.Attendances
orderby attendance.EmpNTLogin
where attendance.CreateDate.Value.Year >= 2016
select new { attendance.Employee, attendance.EmpNTLogin }).Distinct();
答案 0 :(得分：5)
在linq查询中，在import UIKit
import Foundation
class SearchResultViewController: UICollectionViewController, UISearchResultsUpdating {
//private let cellComposer = DataItemCellComposer()
private var vms: VideoManagerService!
private var filteredVideos = [ScoreVideo]()
static let storyboardIdentifier = "SearchResultViewController"
var filterString = "" {
didSet {
// Return if the filter string hasn't changed.
guard filterString != oldValue else { return }
// Apply the filter or show all items if the filter string is empty.
if self.filterString.isEmpty {
self.filteredVideos = StringSearchService.start(self.filterString, videos: self.vms.videos)
}
else {
self.filteredVideos = StringSearchService.start(self.filterString, videos: self.vms.videos)
}
self.collectionView?.reloadData()
}
}
override func viewDidLoad() {
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
self.vms = appDelegate.getVideoManagerService()
}
// MARK: UICollectionViewDataSource
override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return 1
}
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
print("count..\(filteredVideos.count)")
return filteredVideos.count
}
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
// Dequeue a cell from the collection view.
return collectionView.dequeueReusableCellWithReuseIdentifier(VideoSearchCell.reuseIdentifier, forIndexPath: indexPath)
}
// MARK: UICollectionViewDelegate
override func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
guard let cell = cell as? VideoSearchCell else { fatalError("Expected to display a `VideoSearchCell`.") }
let item = filteredVideos[indexPath.row]
cell.configureCell(item.video)
}
override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
dismissViewControllerAnimated(true, completion: nil)
}
// MARK: UISearchResultsUpdating
func updateSearchResultsForSearchController(searchController: UISearchController) {
print("updating... \(searchController.searchBar.text)")
filterString = searchController.searchBar.text!.lowercaseString ?? ""
}
}
之后应用distinct，因此会丢弃该订单。
在调用distinct
之后应用orderbyorderby答案 1 :(得分：0)
您需要先应用'where'子句，然后应用'orderby'子句。 像这样：
var query = (from attendance in db.Attendances
where attendance.CreateDate.Value.Year >= 2016
orderby attendance.EmpNTLogin
select new { attendance.Employee, attendance.EmpNTLogin }).Distinct();