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1. Top results related to eight function of dictionary in c# class

   • C# - dictionary - How to get max of specific class value in dictionary?

     Top Answer

     Answered Aug 11, 2020 · 5 votes

     To get LineInfo with maximum lineDistance you can use Values collection. Since there is no MaxBy in standard LINQ you can achieve similar effect with Aggregate

     :

     var max = lines.Values .Aggregate((acc, curr) => acc.lineDistance > curr.lineDistance ? acc: curr);-

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     1/5

   • In C#, how do you output the contents of a Dictionary class?

     Top Answer

     Answered Aug 23, 2012 · 3 votes

     Here's an example from http://www.dotnetperls.com/dictionary

     using System;using System.Collections.Generic;-class Program{ static void Main() { // Example Dictionary again Dictionary<string, int> d = new Dictionary<string, int>() { {"cat", 2}, {"dog", 1}, {"llama", 0}, {"iguana", -1} }; // Loop over pairs with foreach foreach (KeyValuePair<string, int> pair in d) { Console.WriteLine("{0}, {1}", pair.Key, pair.Value); } // Use var keyword to enumerate dictionary foreach (var pair in d) { Console.WriteLine("{0}, {1}", pair.Key, pair.Value); } }}

     The last loop uses var to declare the KeyValuePair object. It's easier this way, since you don't have to worry about declaring the types used in the Dictionary, and produces the same result to the CLR.

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     2/5

   • Dictionary Of Dictionaries in C#

     Top Answer

     Answered Dec 08, 2016 · 8 votes

     You can fill the dictionary directly in your loop

     private Dictionary<string, Dictionary<string, Dictionary<string, string>>> zooDict = new Dictionary<string, Dictionary<string, Dictionary<string, string>>>();-while (reader.Read()){ var location = reader.GetString(0).Trim(); var animal= reader.GetString(1).Trim(); var Monday= reader.GetValue(1).ToString().Trim(); var Tuesday= reader.GetValue(3).ToString().Trim(); if(!zooDict.ContainsKey(location)) zooDict[location] = new Dictionary<string, Dictionary<string, string>>(); zooDict[location][animal] = new Dictionary<string, string>() { { "MN", Monday }, { "Tu", Tuesday } };}

     As a side note, you might want to consider creating classes to represent your objects, add them to a dictionary or list, and use Newtonsoft Json.net (http://www.newtonsoft.com/json) to serialize them instead of using dictionaries for everything. For example, you can create a class:

     public class Animal{ public string Name { get; set; } public int Monday { get; set; } public int Tuesday { get; set; }}var zooDict = new Dictionary<string, List<Animal>>();// then in your while loop you do this if(!zooDict.ContainsKey(location)) zooDict[location] = new List<Animal>();zooDict[location].Add(new Animal() { /* fill Monday and Tuesday properties */ });

     Of course, you can take this one step further and create a class with properties string Location and List<Animal> Animals, and eliminate dictionaries altogether. It depends on your use case(s) I guess

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     3/5

   • c# Lookup for a value in Dictionary of Dictionary

     Top Answer

     Answered Jul 12, 2011 · 4 votes

     you could just have a separate lookup for users:

     Dictionary<string, InfoObject> userLookup;-

     This only of course if you want to optimize for lookup speed, the downside is that addition and removal you have to do now on two separate data structures which have to keep in sync.

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     4/5

   • Class declared inside of another class in C#

     Top Answer

     Answered Mar 27, 2009 · 61 votes

     You create an inner class because it is only ever used within the scope of class x and it logically fits in the factoring/architecture of class x.

     Class y might also be privy to implementation details of class x that are not meant to be known to the public.

     Other Answers

     Answered Mar 26, 2009 · 20 votes

     This has permissions implications. A top-level "class y" would be "internal" - however, here "y" is private to "x". This approach is helpful for implementation details (for example cache rows etc). Likewise, y has access to all private state of x.

     There are also implications with generics; x<T>.y is generic "of T", inherited from the outer class. You can see this here, where Bar has full use of T - and note that any static fields of Bar are scoped per-T.

     class Foo<T> { void Test(T value) { Bar bar = new Bar(); bar.Value = value; } class Bar { public T Value { get; set; } }}

     Often people incorrectly think they need to define Bar as Bar<T> - this is now (effectively) doubly generic - i.e. Foo<TOld, T> - where TOld is the (now unavailable) T from Foo<T>. So don't do that! Or if you want it to be doubly-generic, pick different names. Fortunately, the compiler warns you about this...

     Other Answers

     Answered Mar 26, 2009 · 7 votes

     This code is fine for the exact reason that you have given - "class y is only ever used inside of class x". Those are nested types and one of the guidelines for using them is that nested types should be tightly coupled to their declaring type and must not be useful as a general purpose type. That way the nested class is inacessible to other classes, but still allows you to follow object oriented principles.

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     5/5

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2. learn.microsoft.com › en-us › dotnetDictionary<TKey,TValue> Class (System.Collections.Generic)

   learn.microsoft.com › en-us › dotnet

   • Cached

   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.

3. stackoverflow.com › questions › 8091000How to access Dictionary from other Class's function in C#?

   stackoverflow.com › questions › 8091000

   • Cached

   Nov 11, 2011 · 4 Answers. Sorted by: 4. Declare Dictionary as class property. public class Dict { private Dictionary<string, string> dict; public SomeDictionary { get dict; set dict = value; } public Dict() { dict = new Dictionary<string, string>(); dict.Add("Classifieds", "Kleinanzeigen"); } } In other class: Dict d = new Dict();

4. stackoverflow.com › questions › 4233536C# Store functions in a Dictionary - Stack Overflow

   stackoverflow.com › questions › 4233536

   • Cached

   Like this: Dictionary<int, Func<string, bool>>. This allows you to store functions that take a string parameter and return boolean. dico[5] = foo => foo == "Bar"; Or if the function is not anonymous: dico[5] = Foo; where Foo is defined like this: public bool Foo(string bar) {.

5. www.geeksforgeeks.org › c-sharp-dictionary-classC# | Dictionary Class - GeeksforGeeks

   www.geeksforgeeks.org › c-sharp-dictionary-class

   • Cached

   Sep 1, 2021 · C# | Dictionary Class. Last Updated : 01 Sep, 2021. The Dictionary<TKey, TValue> Class in C# is a collection of Keys and Values. It is a generic collection class in the System.Collections.Generic namespace. The Dictionary <TKey, TValue> generic class provides a mapping from a set of keys to a set of values.

6. stackoverflow.com › questions › 63349343c# - How to use dictionary in class - Stack Overflow

   stackoverflow.com › questions › 63349343

   • Cached

   Aug 11, 2020 · How to use dictionary in class. Asked 3 years, 9 months ago. Modified 3 years, 9 months ago. Viewed 283 times. -2. How do i add items to dictionary using a textbox, i am also facing problems on linking my dictionary to a listbox since i created my dictionary in a class, how do i call alphabet from class to Form1. MY CLASS with the dictionary.

7. kenslearningcurve.com › tutorials › usingUsing dictionaries in C# with examples - Tutorial

   kenslearningcurve.com › tutorials › using

   • Cached

   Dec 30, 2022 · written by Kens Learning Curve December 30, 2022. Dictionaries in C# are collections of keys, values, and a well-used class. I’ll show you the class’s basics in this tutorial with examples. I’ll explain what a dictionary is, what it’s used for, and how we use them.

8. zetcode.com › csharp › dictionaryC# Dictionary - working with a Dictionary collection in C#

   zetcode.com › csharp › dictionary

   • Cached

   Jul 5, 2023 · A dictionary, also called an associative array, is a collection of unique keys and a collection of values, where each key is associated with one value. Retrieving and adding values is very fast. Dictionaries take more memory because for each value there is also a key. C# Dictionary initializers.