How to Elegantly Implement Retry Logic in C#?

Realize the logic of retrying the logic elegantly in C#

In software development, some operations may need to be tried multiple times to successfully complete. Traditional methods usually use the

cycle with explicit retry times, such as the following code:

while

Although this method ensures that the operation will be repeatedly defined, the compilation may be complicated in different cases. More common methods can provide more concise and reusable solutions.

<code class="language-csharp">int retries = 3;
while (true)
{
    try
    {
        DoSomething();
        break; // 成功！
    }
    catch
    {
        if (--retries == 0) throw;
        else Thread.Sleep(1000);
    }
}</code>

Introduce

Class

Retry The goal is to create a reusable class, which accepts a commission as a parameter and performs operations in the re -test block. The following code provides a possible implementation:

Retry Use

Class

<code class="language-csharp">public static class Retry
{
    public static void Do(Action action, TimeSpan retryInterval, int maxAttemptCount = 3)
    {
        Do(() => { action(); return null; }, retryInterval, maxAttemptCount);
    }

    public static T Do<T>(Func<T> action, TimeSpan retryInterval, int maxAttemptCount = 3)
    {
        var exceptions = new List<Exception>();

        for (int attempted = 0; attempted < maxAttemptCount; attempted++)
        {
            try
            {
                return action();
            }
            catch (Exception ex)
            {
                exceptions.Add(ex);
                if (attempted < maxAttemptCount -1)
                {
                    Thread.Sleep(retryInterval);
                }
            }
        }
        throw new AggregateException(exceptions);
    }
}</code>

This method can be used in various ways to achieve retry logic: Retry

As shown, this method provides a flexible way to handle retry, which can specify the number of attempts, retry interval, and operation to be executed.

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