ConcurrentDictionary AddOrUpdate列表(ConcurrentDictionary AddOrUpdate a list)

我正在尝试使用ConcurrentDictionary来帮助完成过滤任务。

如果列表中出现一个数字，那么我想将一个条目从一个字典复制到另一个字典。

但这部分AddOrUpdate不对 - v.Add(number)

我明白了

“无法将类型'void'隐式转换为'System.Collections.Generic.List'

还有两个错误。

class Program { static void Main(string[] args) { Program p = new Program(); List<int> filter = new List<int> {1,2}; p.Filter(filter); } private void Filter(List<int> filter) { Dictionary<string, List<int>> unfilteredResults = new Dictionary<string, List<int>>(); unfilteredResults.Add("key1", new List<int> { 1,2,3,4,5}); ConcurrentDictionary<string, List<int>> filteredResults = new ConcurrentDictionary<string, List<int>>(); foreach (KeyValuePair<string, List<int>> unfilteredResult in unfilteredResults) { foreach (int number in unfilteredResult.Value) { if (filter.Contains(number)) { filteredResults.AddOrUpdate(unfilteredResult.Key, new List<int> { number }, (k, v) => v.Add(number)); } } } } }

I'm trying to use a ConcurrentDictionary to help with a filtering task.

If a number appears in list, then I want to copy an entry from one dictionary to another.

But this part of the AddOrUpdate is not right - v.Add(number)

I get

"Cannot implicitly convert type 'void' to 'System.Collections.Generic.List'

And two more errors.

class Program { static void Main(string[] args) { Program p = new Program(); List<int> filter = new List<int> {1,2}; p.Filter(filter); } private void Filter(List<int> filter) { Dictionary<string, List<int>> unfilteredResults = new Dictionary<string, List<int>>(); unfilteredResults.Add("key1", new List<int> { 1,2,3,4,5}); ConcurrentDictionary<string, List<int>> filteredResults = new ConcurrentDictionary<string, List<int>>(); foreach (KeyValuePair<string, List<int>> unfilteredResult in unfilteredResults) { foreach (int number in unfilteredResult.Value) { if (filter.Contains(number)) { filteredResults.AddOrUpdate(unfilteredResult.Key, new List<int> { number }, (k, v) => v.Add(number)); } } } } }