如何转换字典 <int, long> 字符串数组/列表？

Question

I would like to convert a Dictionary to a string array (or list)
The string array needs to be returned like this: "ID, PTS" where int is ID and long is PTS.

Please help! Thanks,
~Nikku.

Answer 1

var strings = dict.Select(item => string.Format("{0}, {1}", item.Key, item.Value));

Note that this returns an enumerator. Whether you want the result in the form of string[] or List<string> you should use .ToArray() or .ToList() , respectively.

Answer 2

You can do it like this:

string[] arr =
  theDictionary
  .Select(kvp => kvp.Key.ToString() + ", " + kvp.Value.ToString())
  .ToArray();

Answer 3

The simple answer is to iterate over the dictionary, and copy the values into a string list.

Dictionary<int, long> dict = new Dictionary<int, long>();

// If you like Linq. Stick a .ToArray() or .ToList() at the end, or leave it as IEnumerable<string>
var stringList = dict.Select(kvp => kvp.Key.ToString() + ", " + kvp.Value.ToString());

// If you don't like Linq.
List<string> stringList2 = new List<string>();
foreach (KeyValuePair<int, long> kvp in dict)
{
    stringList2.Add(kvp.Key.ToString() + ", " + kvp.Value.ToString());
}