Question

让我们假设简单数据：

Dictionary<string, object> dict = new Dictionary<string, object>();
dict.Add("obj 1", null);
dict.Add("obj 2", new object());
dict.Add("obj 3", new object());
dict.Add("obj 4", null);

Dictionary<string, object> dict2 = new Dictionary<string, object>();
dict2.Add("obj 1", null);
dict2.Add("obj 2", new object());
dict2.Add("obj 3", null);
dict2.Add("obj 4", null);

Dictionary<string, object> dict3 = new Dictionary<string, object>();
dict3.Add("obj 1", null);
dict3.Add("obj 2", null);
dict3.Add("obj 3", new object());
dict3.Add("obj 4", null);

List<Dictionary<string, object>> list = new List<Dictionary<string, object>> {dict, dict2, dict3};

是否可以选择行并删除所有列中的键/值为空的键/值？所以在我的列表中这之后将是：

dict({"obj 2", object}, {"obj 3", object})
dict2({"obj 2", object}, {"obj 3", null})
dict2({"obj 2", null}, {"obj 3", object})

Answer 1

试试这个：

 list.ForEach(x =>
        {

            x.Where(y => y.Value == null).ToList().ForEach(z=>
                {
                    if(list.All(l=>!l.ContainsKey(z.Key)|| l[z.Key]==null))
                        x.Remove(z.Key);
                });
        });

从List <dictionary <string，object =“”>＆gt; </dictionary <string，>中选择LINQ行

1 个答案: