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.Net Core 缓存

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参考 .net core 中的缓存内存

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using Microsoft.Extensions.Caching.Memory;

public class HomeController : Controller
{
    private IMemoryCache _cache;

    public HomeController(IMemoryCache memoryCache)
    {
        _cache = memoryCache;
    }

CacheKeys API
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public static class CacheKeys
{
    public static string Entry { get { return "_Entry"; } }
    public static string CallbackEntry { get { return "_Callback"; } }
    public static string CallbackMessage { get { return "_CallbackMessage"; } }
    public static string Parent { get { return "_Parent"; } }
    public static string Child { get { return "_Child"; } }
    public static string DependentMessage { get { return "_DependentMessage"; } }
    public static string DependentCTS { get { return "_DependentCTS"; } }
    public static string Ticks { get { return "_Ticks"; } }
    public static string CancelMsg { get { return "_CancelMsg"; } }
    public static string CancelTokenSource { get { return "_CancelTokenSource"; } }
}

缓存一个时间
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DateTime cacheTiming;

// Look for cache key.
if (!_cache.TryGetValue(CacheKeys.Entry, out cacheEntry))
{
    cacheEntry = DateTime.Now;

    // Set cache options.
    var cacheEntryOptions = new MemoryCacheEntryOptions()
        // Keep in cache for this time, reset time if accessed.
        .SetSlidingExpiration(TimeSpan.FromSeconds(3));

    // Save data in cache.
    _cache.Set(CacheKeys.Entry, cacheTiming, cacheEntryOptions);
}

取出缓存
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var timing = _cache.Get<DateTime?>(CacheKeys.Entry);

可调过期（slide expiration）时间和绝对过期（absolute expiration）时间