【缓存】.net中Cache管理操作

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【缓存】.net中Cache管理操作

2024-10-29 11:17:39 207人阅读

这是一段程序代码。

```
using System;
```
```
using System.Web;
```
```
using System.Web.Caching;
```
```
using System.Collections;
```
```
/// <summary>
```
```
/// 设置Cache操作类
```
```
/// </summary>
```
```
public class SetCache
```
```
{
```
```
    #region 用户自定义变量
```

    private static readonly Cache _cache;//缓存实例

    private static readonly int hourfactor;

```
    #endregion
```
```
    #region 构造函数
```
```
    static SetCache()
```
```
    {
```
```
        hourfactor = 3600;
```
```
        _cache = HttpRuntime.Cache;
```
```
    }
```
```
    private SetCache()
```
```
    {
```
```
    }
```
```
    #endregion
```
```
    #region 清除所有缓存
```
```
    /// <summary>
```
```
    /// 清除所有缓存
```
```
    /// </summary>
```
```
    public static void Clear()
```
```
    {
```

        //要循环访问 Cache 对象的枚举数

        IDictionaryEnumerator enumerator = _cache.GetEnumerator();//检索用于循环访问包含在缓存中的键设置及其值的字典枚举数

```
        if (enumerator != null)
```
```
        {
```

            while (enumerator.MoveNext())

```
            {
```

                _cache.Remove(enumerator.Key.ToString());

```
            }
```
```
        }
```
```
    }
```
```
    #endregion
```
```
    #region 得到缓存实例
```
```
    /// <summary>
```
```
    /// 得到缓存实例
```
```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <returns>返回缓存实例</returns>

    public static object GetCache(string key)

```
    {
```
```
        return _cache[key];
```
```
    }
```
```
    #endregion
```
```
    #region 缓存实例插入
```
```
    /// <summary>
```

    /// 缓存实例插入(默认缓存20分钟)

```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <param name="obj">要缓存的对象</param>

    public static void Insert(string key, object obj)

```
    {
```
```
        CacheDependency dep = null;
```
```
        Insert(key, obj, dep, 20);
```
```
    }
```
```
    /// <summary>
```
```
    /// 缓存实例插入
```
```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <param name="obj">要缓存的对象</param>

    /// <param name="seconds">缓存的时间</param>

    public static void Insert(string key, object obj, int seconds)

```
    {
```
```
        CacheDependency dep = null;
```
```
        Insert(key, obj, dep, seconds);
```
```
    }
```
```
    /// <summary>
```

    /// 缓存实例插入(缓存过期时间是一天)

```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <param name="obj">要缓存的对象</param>

    /// <param name="dep">缓存的依赖项</param>

    public static void Insert(string key, object obj, CacheDependency dep)

```
    {
```

        Insert(key, obj, dep, hourfactor * 12);

```
    }
```
```
    /// <summary>
```

    /// 缓存实例插入(缓存过期时间是一天)

```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <param name="obj">要缓存的对象</param>

    /// <param name="xmlPath">缓存的依赖项xml文件的路径（绝对路径）</param>

    public static void Insert(string key, object obj, string xmlPath)

```
    {
```

        CacheDependency dep = new CacheDependency(xmlPath);

        Insert(key, obj, dep, hourfactor * 12);

```
    }
```
```
    /// <summary>
```
```
    /// 缓存实例插入
```
```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    /// <param name="obj">要缓存的对象<</param>

    /// <param name="seconds">缓存时间</param>

    /// <param name="priority">该对象相对于缓存中存储的其他项的成本</param>

    public static void Insert(string key, object obj, int seconds, CacheItemPriority priority)

```
    {
```

        Insert(key, obj, null, seconds, priority);

```
    }
```
```
    /// <summary>
```
```
    /// 缓存实例插入
```
```
    /// </summary>
```

    /// <param name="key">用于引用该对象的缓存键</param>

    /// <param name="obj">要插入缓存中的对象</param>

    /// <param name="dep">该项的文件依赖项或缓存键依赖项。当任何依赖项更改时，该对象即无效，并从缓存中移除。如果没有依赖项，则此参数包含空引用（Visual Basic 中为 Nothing）</param>

    /// <param name="seconds">所插入对象将过期并被从缓存中移除的时间。</param>

    public static void Insert(string key, object obj, CacheDependency dep, int seconds)

```
    {
```

        Insert(key, obj, dep, seconds, CacheItemPriority.Normal);

```
    }
```
```
    /// <summary>
```
```
    /// 缓存实例插入
```
```
    /// </summary>
```

    /// <param name="key">用于引用该对象的缓存键</param>

    /// <param name="obj">要插入缓存中的对象</param>

    /// <param name="xmlPath">缓存的依赖项xml文件的路径（绝对路径）</param>

    /// <param name="seconds">所插入对象将过期并被从缓存中移除的时间。</param>

    public static void Insert(string key, object obj, string xmlPath, int seconds)

```
    {
```

        CacheDependency dep = new CacheDependency(xmlPath);

        Insert(key, obj, dep, seconds, CacheItemPriority.Normal);

```
    }
```
```
    /// <summary>
```
```
    /// 缓存实例插入
```
```
    /// </summary>
```

    /// <param name="key">用于引用该对象的缓存键</param>

    /// <param name="obj">要插入缓存中的对象</param>

    /// <param name="dep">该项的文件依赖项或缓存键依赖项。当任何依赖项更改时，该对象即无效，并从缓存中移除。如果没有依赖项，则此参数包含空引用（Visual Basic 中为 Nothing）。</param>

    /// <param name="seconds">所插入对象将过期并被从缓存中移除的时间。</param>

    /// <param name="priority">该对象相对于缓存中存储的其他项的成本，由 CacheItemPriority 枚举表示。该值由缓存在退出对象时使用；具有较低成本的对象在具有较高成本的对象之前被从缓存移除。 </param>

    public static void Insert(string key, object obj, CacheDependency dep, int seconds, CacheItemPriority priority)

```
    {
```
```
        if (obj != null)
```
```
        {
```

            _cache.Insert(key, obj, dep, DateTime.Now.AddSeconds((double)seconds), TimeSpan.Zero, priority, null);

```
        }
```
```
    }
```
```
    #endregion
```
```
    #region 移出单个缓存
```
```
    /// <summary>
```
```
    /// 移出单个缓存
```
```
    /// </summary>
```

    /// <param name="key">缓存实例名称</param>

    public static void Remove(string key)

```
    {
```
```
        _cache.Remove(key);
```
```
    }
```
```
    #endregion
```

    #region 得到所有使用的Cache键值

```
    /// <summary>
```

    /// 得到所有使用的Cache键值

```
    /// </summary>
```

    /// <returns>返回所有的Cache键值</returns>

    public static ArrayList GetAllCacheKey()

```
    {
```

        ArrayList arrList = new ArrayList();

        IDictionaryEnumerator enumerator = _cache.GetEnumerator();

```
        if (enumerator != null)
```
```
        {
```

            while (enumerator.MoveNext())

```
            {
```

                arrList.Add(enumerator.Key);

```
            }
```
```
        }
```
```
        return arrList;
```
```
    }
```
```
    #endregion
```
```
}
```

【缓存】.net中Cache管理操作

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【缓存】.net中Cache管理操作

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