Question

C# 怎么拿到字典中的key 除了foreach(string items in dic.Keys) 还有别的方式吗？能不循环拿到Key值吗？

Answer 1

看你要拿到什么了，list？数组？还是一个string？
Dictionary<string, string> strDic = new Dictionary<string, string>();
strDic.Add("a", "aa");
strDic.Add("bb", "aa");
strDic.Add("vvv", "aa");
strDic.Add("aff", "aa");

strDic.Keys.ToList();
strDic.Keys.ToArray(); //第一种array
var arr = strDic.Select(p => p.Key).ToArray();//第二种array
MessageBox.Show(string.Join(",", arr));

Answer 2

Dictionary<string,string>strDic =new Dictionary<string,string>();
foreach (KeyValuePair<string, string> str in strDic) {}