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我有兩個對象列表,我必須刪除其他列表中刪除的值到'原始'列表中;但該項目由兩個屬性標識。 我能做到這一點,當對象僅由一個屬性標識,但現在我需要檢查兩個屬性從列表C#中刪除項目#
// library: object with deleted data
// library = new List<Widget>() { new Widget() { Id = "1", Nbr = 1 }, new Widget() { Id = "3", Nbr = 2 } };
var allData = GetData();
// allData = new List<Widget>() { new Widget() { Id = "1", Nbr = 1 }, new Widget() { Id = "2", Nbr = 1 }, new Widget() { Id = "3", Nbr = 2 } };
// var itemsToDelete = allData.Where(w => library.All(p => p.Id != w.Id)).ToList(); // I would do this, if the identifier would be only Id
var itemsToDelete = allData.Where(w => library.All(p => p.Id != w.Id && p.Nbr != w.Nbr)).ToList(); // I need to check for two properties and I'm getting zero coincidences
對我來說一見鍾情,你是否檢查過你的數據和你的狀況? – Jannik
會很高興得到一些樣本數據 – Prescott
你得到的library.All(p => p.Id!= w.Id && p.Nbr!= w.Nbr)? – g2000