public void Render(ViewContext viewContext, TextWriter writer)
{
Page page = new Page();
Control ctl = page.LoadControl(ViewPath);
if (ctl == null)
{
throw new InvalidOperationException(string.Format("指定的用户控件 {0} 没有找到。", ViewPath));
}
// 将用户控件放在Page容器中。
page.Controls.Add(ctl);
PartialCachingControl mycachectl = ctl as PartialCachingControl;//如果有 写outputcache指令
Control temp = ctl;
if (mycachectl != null)
{
Page_request.FastSetValue(page, viewContext.HttpContext.Request);//将当前的Request 写入当前页面
page.DesignerInitialize();
temp = mycachectl.CachedControl;
}
ViewUserControlBase myctl = temp as ViewUserControlBase;
if (myctl != null)
{
myctl.ViewContext = viewContext;
}
HtmlTextWriter write = new HtmlTextWriter(writer, string.Empty);
page.RenderControl(write);
}
//动态加载用户控件
protected void Page_Init(object sender, EventArgs e)
{
this.Label1.Text = DateTime.Now.ToLongTimeString();
//动态加载用户控件，并返回PartialCachingControl的实例对象
PartialCachingControl pcc = LoadControl("WebUserControl.ascx") as PartialCachingControl;
//如果用户控件的缓存时间大于60秒，那么重新设置缓存时间为10秒
if (pcc.CachePolicy.Duration > TimeSpan.FromSeconds(60))
{
//设置用户控件过期时间
pcc.CachePolicy.SetExpires(DateTime.Now.Add(TimeSpan.FromSeconds(10)));
//设置缓存绝对过期
pcc.CachePolicy.SetSlidingExpiration(false);
}
Controls.Add(pcc); //将用户控件添加到页面中
}
private static PortalMasterView CreateMasterPrivate(string virtualPath)
{
Control control = Loader.LoadControl(virtualPath);
PortalMasterView master = control as PortalMasterView;
if (master == null)
{
PartialCachingControl pcc = control as PartialCachingControl;
if (pcc != null)
{
master = pcc.CachedControl as PortalMasterView;
}
}
if (master == null)
{
throw new ArgumentException("The control '" + virtualPath + "' is not of type '" + typeof(PortalMasterView).Name + "'.", "path");
}
return(master);
}
private static Tile CreateTilePrivate(TileDefinition tileDefinition)
{
Control control = Loader.LoadControl(tileDefinition.VirtualPath);
Tile tile = control as Tile;
if (tile == null)
{
PartialCachingControl pcc = control as PartialCachingControl;
if (pcc != null)
{
tile = pcc.CachedControl as Tile;
}
}
if (tile == null)
{
throw new ArgumentException("The control '" + tileDefinition.VirtualPath + "' is not of type '" + typeof(Tile).Name + "'.", "path");
}
tile.LayoutId = tileDefinition.LayoutId;
return(tile);
}