protected void OutlineRadioButtonList_SelectedIndexChanged(object sender, EventArgs e)
{
string categoryIdString = OutlineRadioButtonList.SelectedValue;
DataSet categoryDataset = null;
if (null == Cache["category"])
{
NewsDAO newsDao = new NewsDAO();
categoryDataset = newsDao.GetAllCategory();
Cache.Insert("category", categoryDataset, null, DateTime.UtcNow.AddMinutes(10), System.Web.Caching.Cache.NoSlidingExpiration);
}
else
{
categoryDataset = Cache["category"] as DataSet;
if (null == categoryDataset)
{
NewsDAO newsDao = new NewsDAO();
categoryDataset = newsDao.GetAllCategory();
Cache.Insert("category", categoryDataset, null, DateTime.UtcNow.AddMinutes(10), System.Web.Caching.Cache.NoSlidingExpiration);
}
}
this.CategoryDropDownList.DataSource = categoryDataset.Tables[categoryIdString];
this.CategoryDropDownList.DataTextField = "name";
this.CategoryDropDownList.DataValueField = "id";
this.CategoryDropDownList.DataBind();
}