如何获得字典的钥匙和价值 <int, string> 从方法返回

Question

I'm collecting data dynamically and I've chosen Dictionary<int, string> as data structure to store this data.

At the beginning of my method I declare a variable :

Dictionary<int, string> templatesKeyName = new Dictionary<int, string>();

at the end of the method I want templatesKeyName to contains all pairs of int (ids) and Names relevent for this request. So for example I have:

private static Dictionary<int, string> GetTemplateForUserWithAccount()
{
Dictionary<int, string> kv = new Dictionary<int, string>();
//populate the `kv` dictionary
return kv;
}

and I want to be able to do something like:

if(Client.Accounts.Count > 0)
{
  templatesKeyName.Add(GetTemplateForUserWithAccount());
}

Obviously .Add() extension expects two arguments but I wasn't able to find out how can I pass the values from the method without writing first assigning the result to e temporary Dictionary and then iterating with foreach .Also, most likely I will get single result most of the time so iteration is not something that I consider really.

Answer 1

You can create an extension method for that:

public static void AddRange<T,K>(this Dictionary<T,K> source, IEnumerable<KeyValuePair<T,K>> values)
{
    foreach(var kvp in values)
    {
       if(!source.ContainsKey(kvp.Key))
          source.Add(kvp.Key, kvp.Value);
    }
}

And use it like the following:

templatesKeyName.AddRange(GetTemplateForUserWithAccount());