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      • In these scenarios, we can use LINQ's ToDictionary () method. Here's an example: // Define a list of integers List list = new List () { 1, 2, 3, 4, 5 }; // Initialize a dictionary from the list, where the value is the square of the key Dictionary dict = list.ToDictionary(x => x, x => x * x);
      www.gyata.ai › c-sharp › c-initialize-dictionary

      Guide to Initialize a Dictionary in C# | C# Tutorial

  2. Top results related to how to initialize a dictionary in c# with sql query

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  4. stackoverflow.com › questions › 245168c# - Linq-to-SQL ToDictionary() - Stack Overflow

    Mar 27, 2013 · This works: var query = from p in db.Table. select p; Dictionary<string, string> dic = new Dictionary<string, string>(); foreach (var p in query) { dic.Add(sub.Key, sub.Value); } What I'd really like to do is something like this, which doesn't seem to work: var dic = (from p in db.Table. select new {p.Key, p.Value })

    Code sample

    var dictionary = db
      .Table
      .Select(p => new { p.Key, p.Value })
      .AsEnumerable()
      .ToDictionary(kvp => kvp.Key, kvp => kvp.Value)...

    See more on stackoverflow

  5. stackoverflow.com › questions › 953919c# - Convert Linq Query Result to Dictionary - Stack Overflow

    4 Answers. Sorted by: 766. Try using the ToDictionary method like so: var dict = TableObj.Select( t => new { t.Key, t.TimeStamp } ) .ToDictionary( t => t.Key, t => t.TimeStamp ); edited Jan 4, 2022 at 9:40. community wiki.

  6. learn.microsoft.com › en-us › dotnetHow to initialize a dictionary with a collection initializer - C#

    • Overview
    • Example
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    A Dictionary contains a collection of key/value pairs. Its Add method takes two parameters, one for the key and one for the value. One way to initialize a Dictionary , or any collection whose Add method takes multiple parameters, is to enclose each set of parameters in braces as shown in the following example. Another optio...

    See full list on learn.microsoft.com

    In the following code example, a Dictionary is initialized with instances of type StudentName. The first initialization uses the Add method with two arguments. The compiler generates a call to Add for each of the pairs of int keys and StudentName values. The second uses a public read / write indexer method of the Dictionary class:

    Note the two pairs of braces in each element of the collection in the first declaration. The innermost braces enclose the object initializer for the StudentName, and the outermost braces enclose the initializer for the key/value pair that will be added to the students Dictionary . Finally, the whole collection initializer for the dictionary is enclosed in braces. In the second initialization, the left side of the assignment is the key and the right side is the value, using an object initializer for StudentName.

    See full list on learn.microsoft.com

    •C# Programming Guide

    •Object and Collection Initializers

    See full list on learn.microsoft.com

  7. makolyte.com › csharp-initialize-a-dictionaryC# - Initialize a dictionary | makolyte

    Sep 12, 2023 · You can declare a dictionary and initialize it with values by using the collection initializer syntax. Within the initializer block, you have two options for adding key/value pairs to the dictionary: Indexer syntax, like [key] = value. Curly brace syntax, like { key, value }. I’ll show examples of both options below.

  8. makolyte.com › csharp-adding-dynamic-queryC# - Adding dynamic parameters with Dapper | makolyte

    Jan 14, 2022 · You can use WHERE IN with dynamic parameters by passing in a dictionary containing a list of values: //Built dynamically somewhere var query = "SELECT * FROM Movies WHERE Id IN @Ids" ; var parameters = new Dictionary<string, object >() {. ["Ids"] = new List<int >() {. 17, 18, 19 } };

  9. www.tutorialsteacher.com › csharp › csharp-dictionaryC# Dictionary - TutorialsTeacher.com

    The following example shows how to create a dictionary and add key-value pairs. Example: Create Dictionary and Add Elements IDictionary < int , string > numberNames = new Dictionary < int , string >(); numberNames.Add(1, "One" ); //adding a key/value using the Add() method numberNames.Add(2, "Two" ); numberNames.Add(3, "Three" ); //The ...

  10. www.techiedelight.com › initialize-dictionary-csharpInitialize a Dictionary in C# | Techie Delight

    Apr 6, 2024 · 1. Collection Initializer. To initialize a dictionary, we can enclose each set of key-value in curly braces. Internally for each pair, the compiler makes a call to Dictionary’s Add() method. This is demonstrated below: Download Run Code. 2. Index Initializer. We can also initialize a dictionary using an index initializer, as shown below.

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