参考资料：

　因为使用ObjectDataSource自带的缓存机制无法实现排序功能，苦苦寻觅终于找到了解决方案。参考后觉得还是自己实操一下比较安心，下面是对《GridView实战二：使用ObjectDataSource数据源控件》的改进！！

  CL代码：

public class CL{    private OdsDataManager om = new OdsDataManager();    private static string[] mainKey = {"ods"};    public CL()    {    }    public DataTable GetRecord(int maximumRows, int startRowIndex, string sortExpression)    {        DataTable dt = HttpRuntime.Cache[GetCacheKey(Convert.ToString(maximumRows) + startRowIndex)] as DataTable;        if (dt == null)        {            dt = om.GetRecord(maximumRows, startRowIndex, sortExpression);            AddCache(Convert.ToString(maximumRows) + startRowIndex, dt);        }        if (!string.IsNullOrEmpty(sortExpression))        {            DataTable tempDt = dt.Clone();            DataRow[] drs = dt.Select("",sortExpression);            foreach (DataRow dr in drs)            {                tempDt.Rows.Add(dr.ItemArray);            }            dt = tempDt;        }        return dt;    }    public int GetRecordCount()    {        return om.GetRecordCount();    }    public bool UpdateRecord(int ID, string Name, string Sex, string Country, string Hobby)    {        RemoveCache();        return om.UpdateRecord(ID,Name,Sex,Country,Hobby);    }    public bool DelRecord(int ID)    {        RemoveCache();        return om.DelRecord(ID);    }    public DataTable GetCountry()    {        DataTable countryDt = HttpRuntime.Cache["countryDt"] as DataTable;        return countryDt;    }    public DataTable GetHobby()    {        DataTable hobbyDt = HttpRuntime.Cache["hobbyDt"] as DataTable;        return hobbyDt;    }    private void AddCache(string key, object data)    {        System.Web.Caching.Cache dc = HttpRuntime.Cache;        if (dc[mainKey[0]] == null)            dc.Insert(mainKey[0], DateTime.Now);        System.Web.Caching.CacheDependency cd = new System.Web.Caching.CacheDependency(null, mainKey);        dc.Insert(GetCacheKey(key), data, cd, System.Web.Caching.Cache.NoAbsoluteExpiration, System.Web.Caching.Cache.NoSlidingExpiration);    }    private void RemoveCache()    {        System.Web.Caching.Cache dc = HttpRuntime.Cache;        if (dc[mainKey[0]] != null)            dc[mainKey[0]] = DateTime.Now;    }    private string GetCacheKey(string key)    {        return mainKey[0] + "-" + key;    }}

实现预加载(proactive loading)

void Application_Start(object sender, EventArgs e)     {        // 在应用程序启动时运行的代码        OdsDataManager om = new OdsDataManager();        HttpRuntime.Cache.Insert("countryDt", om.GetCountry(), null,            System.Web.Caching.Cache.NoAbsoluteExpiration,            System.Web.Caching.Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, null);        HttpRuntime.Cache.Insert("hobbyDt", om.GetHobby(), null,            System.Web.Caching.Cache.NoAbsoluteExpiration,            System.Web.Caching.Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, null);        om = null;    }