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我試圖解析如下所示的JSON文件,並獲得與特定名稱的地點的座標:JSON和LINQ查詢
{"Theaters":[{"TheaterName":"Name1","GPSLocation":"3.888689,35.519845"},{"TheaterName":"Name2","GPSLocation":"33.867444,3.527002"},{"TheaterName":"Name3","GPSLocation":"33.897403,3.563645"},{"TheaterName":"Name4","GPSLocation":"34.438693, 3.831660"},{"TheaterName":"Name5","GPSLocation":"3.88392,35.48333"},{"TheaterName":"Name6","GPSLocation":"33.88424,35.483145"},{"TheaterName":"Name7","GPSLocation":"33.972802, 3.610099"},{"TheaterName":"Name8","GPSLocation":"33.857193,35.526886"},
{"TheaterName":"Name9","GPSLocation":"3.36394,35.735929"},{"TheaterName":"Name10","GPSLocation":"3.897403,35.563645"},{"TheaterName":"Name11","GPSLocation":"33.886605,3.508580"},{"TheaterName":"Name12","GPSLocation":"33.892134,3.517423"},
{"TheaterName":"Name13","GPSLocation":"3.917253,35.589074"},{"TheaterName":"Name14","GPSLocation":"33.2860,35.6115"}]}
查詢我使用如下所示,但是響應該表達式無法評估。問題是什麼??謝謝
var coordinates = from p in JSON["Theaters"].Children()
where p["TheaterName"].Value<string>() == Name1
select p["GPSLocation"].Values();
對不起,但我沒有得到你的意思,你能解釋一下嗎。 – Ameen
如果您在調試過程中將其他變量/屬性或其他東西懸停在Visual Studio中,則經常會看到消息「表達式無法評估」 - 主要是因爲LINQ表達式的懶惰執行特性(它們會在第一次訪問時執行)。 我只想確定你的意思是這個還是別的。 –
不,你是對的。我正在調試模式下檢查它,並且如您所說,我收到以下答覆。 – Ameen