How Can I Sort a C# Dictionary by Value Using LINQ?

Sort the dictionary by value

When processing the dictionary, it is usually necessary to sort the dictionary for data analysis or presentation. However, built -in dictionary types are usually sorted by keys, which may not meet the required requirements.

To sort the dictionary by value, a common method is to use the linq (language integration query) library in C#. This provides a simple and elegant solution:

This code uses linq to query to create a new dictionary

<code class="language-csharp">Dictionary<string, int> myDict = new Dictionary<string, int>();
myDict.Add("one", 1);
myDict.Add("four", 4);
myDict.Add("two", 2);
myDict.Add("three", 3);

var sortedDict = from entry in myDict orderby entry.Value ascending select entry;</code>

, which is sorted by

attributes. sortedDict Each key value pair in Value from, myDict The clause specifies the sorting conditions. orderby A new dictionary entry is projected by the key and values ​​in the original dictionary. select

This method has the following advantages:

Flexible:
• LINQ allows easy filtering and sorting data. You can easily modify the query to sort or apply other conditions according to different values. Simple:
LINQ grammar is simple and easy to read, reducing the required code.
• Efficiency: LINQ uses delayed execution, which means that the query is actually performed only when the request results. This can improve performance when dealing with large dictionaries.
• By using the function of linq, developers can easily sort the dictionary in a simple and efficient way.

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