How to cache a xml file when I use XmlDataSource1 control?

I u开发者_如何学Gose MenuXML.xml file as datasource of XmlDataSource control in my MasterPage.master, it will be reloaded again and again. could you tell me how to cache the xml file? Thanks!

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XmlDataSource supports caching the file - see EnableCaching property. For example,

 <asp:xmldatasource
        id="XmlDataSource1"
        runat="server"
        datafile="MenuXML.xml"
        enablecaching="True"
        cacheduration="0" />

Above will cache file content till the file is changed. I will suggest you to keep your menus externalized in a separate file (as opposed to putting them directly in markup) as it will reduce clutter (and allow you to switch/change file to change menus if needed).