How Can I Efficiently Iterate Over Dictionaries in C#?

C#dictionary iteration method details

Efficient dictionary element is the key to the operation of the C#dictionary. This article introduces several C#dictionary iteration methods.

Standard iteration method

Recommend the key value of the Cycling iteration dictionary:

This cycle can access each key and its corresponding values ​​in the dictionary. foreach

Other iteration methods

<code class="language-csharp">foreach (KeyValuePair<string, string> entry in myDictionary)
{
    // 使用 entry.Value 或 entry.Key
}</code>

In addition to the cycle, there are other iteration methods:

Use

Cycle: foreach The key to traversing the dictionary, and through the index access value:

• Use for Attributes: Only the collection of values:

  <code class="language-csharp">  for (int i = 0; i < myDictionary.Count; i++)
    {
        string key = myDictionary.Keys.ElementAt(i);
        string value = myDictionary[key];
        // 使用 key 和 value
    }</code>

• Use Attribute: Dictionary.Values Only the collection of the calendar key:

  <code class="language-csharp">  foreach (string value in myDictionary.Values)
    {
        // 使用 value
    }</code>

• Which iteration method depends on the specific requirements of the application. However,

  cycle is usually recommended, because it provides a simple and efficient way to traverse the key and values ​​in the dictionary.

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