使用linq語句隨機選擇數據行

Question

嗨，我有一個叫單詞表的表。 具有以下字段：WordID，Word，提示，類別。 該表有40行數據。 我想隨機選擇一行符合特定條件的數據。 這是我的代碼：

public List<WordTable> get(string diff, string cat)
{
    using(Entities obj = new Entities())
    {
        var qry = (from c in obj.WordTables where c.DifficultyLevel == diff 
                                                  && c.Category == cat select c);
        return qry.ToList();
    }    
}

Answer 1

對於隨機選擇，您可以這樣做，

public WordTable get(string diff, string cat)
{
    var qry = (from c in obj.WordTables where 
         c.DifficultyLevel == diff && c.Category == cat select c);
    var list = qry.ToList();
    Random r = new Random()
    var element = list [ r.Next(0, list.count-1)];
    return element;
}