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24 lut 2016 · The key here is to alter your dictionary to IDictionary<string, DateTime>. The reason is that object also has a ToString method defined, however it will not format your date for you. If you change your dictionary's signature then your indexer will return a DateTime instead of an Object, and the correct ToString method will be called.
If you need to extract an element key based on an index, this function can be used: public string getCard(int random) { return Karta._dict.ElementAt(random).Key; } If you need to extract the Key where the element value is equal to the integer generated randomly, you can use the following function:
You assign each format item a numeric index; the first index starts at 0. In addition to the initial string, your method call should have as many additional arguments as it has index values. For example, a string whose format items have indexes of 0 and 1 should have 2 arguments; one with indexes 0 through 5 should have 6 arguments.
The Dictionary<TKey,TValue> generic class provides a mapping from a set of keys to a set of values. Each addition to the dictionary consists of a value and its associated key. Retrieving a value by using its key is very fast, close to O (1), because the Dictionary<TKey,TValue> class is implemented as a hash table.
13 lip 2022 · In this article, we’re going to explore accessing Dictionary items by index in C# and its performance considerations. The Dictionary<TKey,TValue> generic class provides the ability to map keys to values.
The Dictionary<TKey,TValue> class represents a collection of keys and values. It belongs to the System.Collections.Generic namespace. The TKey and TValue are the types of keys and values in the dictionary. Every key in a dictionary must be unique. Also, a key cannot be null if its type is a reference type.
3 gru 2022 · Learn to use custom date and time format strings to convert DateTime or DateTimeOffset values into text representations, or to parse strings for dates & times.
