在企业级应用中,特别是对大数据量,大访问量的系统中,Cache是非常重要的。
最近一个项目数据量非常之大,访问量也很大,这就要系统应对考验了。加缓存是非常重要的一步
由于此系统SPS+MCMS开发,做多门户的系统,在SPS中写WEBPART大家都知道吧,但是我相信缓存大家
可能都没有加过。在网上查了很多资料,都没有找着相关的代码,于是就查其API吧。。
一看,其实非常简单,而且效率非常之高
WebPart有一个缓存类Microsoft.SharePoint.Portal.WebControls.CacheableWebPart
,直接从该类中派生出来,然后在RenderWebpart时先设置缓存时间,CacheKEY可以设置根据不同的参数来加载不一样的缓存
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protected override void RenderWebPart(HtmlTextWriter output)
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{
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4![](/Images/OutliningIndicators/InBlock.gif)
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this.CacheTimeout=int.Parse(System.Configuration.ConfigurationSettings.AppSettings["CacheTimeOut"]);
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//this.CachePerUser=true; true只对某一用户有效,false 所有用户有效
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if(!RenderCachedOutput(ref output)) //输出缓存,如果不成功的话,就重新加载
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{
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this.RenderMyWebPart(output); //实际的output内容
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StoreCachedOutput(ref output);//加载后将其缓存起来
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}
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}
14![](/Images/OutliningIndicators/None.gif)
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protected override string CacheKey
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{
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get
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{
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if(Page.Request.QueryString["ChannelPath"]!=null||Page.Request.QueryString["ChannelPath"]!="")
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{
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return "New"+Page.Request.QueryString["ChannelPath"];
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}
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return "VidmsCache";
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}
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}
26![](/Images/OutliningIndicators/None.gif)
27![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/None.gif)