如何将包含以逗号分隔字符串的值的Dictionary转换为KeyValuePairs的集合
本文关键字:Dictionary 转换 集合 KeyValuePairs 字符串 分隔 包含 | 更新日期: 2023-09-27 18:13:19
我有一个这样的字典:
Dictionary<string, string> myDict = new Dictionary<string, string>
{
{ "key1", "value1,value2,value3" },
{ "key2", "value4,value5" }
}
如何转换为以下性质的KeyValuePair
的List
:
List<KeyValuePair<string, string>> myList = n List<KeyValuePair<string, string>>
{
{ "key1", "value1" },
{ "key1", "value2" },
{ "key1", "value3" },
{ "key2", "value4" },
{ "key2", "value5" }
}
很抱歉,题目可能不清楚。
这个转换的关键是SelectMany
方法:
var res = myDict
.SelectMany(p => p.Value.Split(',').Select(s => new KeyValuePair<string, string>(p.Key, s)))
.ToList();
不使用linq,
public List<KeyValuePair<string, string>> GenerateKeyValuePair(Dictionary<string,string> dict) {
List<KeyValuePair<string, string>> List = new List<KeyValuePair<string, string>>();
foreach (var item in dict)
{
string[] values = item.Value.Split(',');
for (int i = 0; i < values.Length; i++)
{
List.Add(new KeyValuePair<string, string>(item.Key, values[i].ToString()));
}
}
return List;
}
希望有所帮助,(顺便说一句,Linq是最短的答案)