Webstring value = ( (KeyValuePair)comboBox1.SelectedValue).Value.ToString (); However, you should put a brakepoint there and check what type SelectedValue really is. I assume it's KeyValuePair because your source collection is Dictionary and because of output string for SelectedValue.ToString () which is [1, 202]. Share WebEach key-value pair is separated by a comma, and the key and value are separated by a colon :. The new syntax is more concise and easier to read than the old syntax, especially when initializing a large number of key-value pairs. Note that the dictionary initializer syntax only works with classes that implement the IDictionary interface, such ...
Рефлексия на IDictionary ничего не раскрывает про KeyValuePair
WebIn this example, we define an array of KeyValuePair objects, each containing a key-value pair to add to the dictionary. We then pass this array to the Dictionary constructor to create a new dictionary with the specified key-value pairs. More C# Questions. Creating a comma separated list from IList or IEnumerable in … WebDec 20, 2012 · Just use the Linq First (): var first = like.First (); string key = first.Key; Dictionary val = first.Value; Note that using First on a dictionary gives you a KeyValuePair, in this case KeyValuePair>. Note also that you could derive a specific meaning from the use of First by combining it with ... ウイニングポスト 孫
c# - Get dictionary key by value - Stack Overflow
WebApr 7, 2014 · You theoretically could write a setter, but for a getter, you would need to specify a key that you want to retrieve. That is impossible since properties do not accept parameters. Natural way to accomplish what you want would be to use methods: private Dictionary users = new Dictionary (); public void Set … WebMar 27, 2012 · void AddOrUpdate (Dictionary dict, string key, string value) { if (dict.ContainsKey (key)) { dict [key] = value; } else { dict.Add (key, value); } } //usage: AddOrUpdate (myDict, "some key here", "your value"); You can also use the TryGetValue method but can't see any obvious advantage in this. Share Improve this answer WebApr 8, 2024 · It may have a bit of a heavier footprint than the byte value (unconfirmed), but if the value and key are the same, I can easily get the key from the value. To extend this to those finding this question and who are actually using the "value", you can opt to change your dictionary to a ConcurrentDictionary , and get both ... pagina chivas