CacheDependency is an important part in pet shop 4.0.<\/p>\n
Here is some example code on how to use CacheDependency<\/p>\n
1. create a new xml file as following:<\/p>\n
\r\n\r\n\r\n \r\n ado.net tutorial<\/title>\r\n <author>wudi<\/author>\r\n <\/book>\r\n <book>\r\n <title>ado.net tutorial<\/title>\r\n <author>wudi<\/author>\r\n <\/book>\r\n<\/bookstore>\r\n<\/pre>\n<p>2. create a new webform page running<\/p>\n<pre lang=\"csharp\" line=\"1\">\r\npublic partial class Index : System.Web.UI.Page\r\n {\r\n protected void Page_Load(object sender, EventArgs e)\r\n {\r\n if (!IsPostBack)\r\n {\r\n GetData();\r\n }\r\n\r\n \r\n }\r\n\r\n private void GetData()\r\n {\r\n DataTable source = new DataTable();\r\n if (Cache[\"data\"] == null)\r\n {\r\n DataSet ds = new DataSet();\r\n ds.ReadXml(Server.MapPath(\"bookstore.xml\"));\r\n\r\n Response.Write(\"<p>\" + ds.Tables[0].Rows.Count + \"<\/p>\");\r\n source = ds.Tables[0];\r\n CacheDependency cdy = new CacheDependency(Server.MapPath(\"bookstore.xml\"));\r\n Cache.Insert(\"data\", source, cdy);\r\n if (cdy.HasChanged)\r\n {\r\n System.Diagnostics.Debug.WriteLine(\"Xml Has changed!!!!\");\r\n }\r\n }\r\n else\r\n {\r\n source = Cache[\"data\"] as DataTable;\r\n }\r\n\r\n GridView1.DataSource = source;\r\n GridView1.DataBind();\r\n }\r\n<\/pre>\n<p>3. <strong>Try to change bookstore.xml, then you will find cache is null , then the cache will be reloaded.<\/strong><\/p>\n<p>Sometime, one cache may depends on multiple dependency.<br \/>\nThe following example show one cache depends on two xml files “ProductList1.xml” and “ProductList2.xml”<\/p>\n<pre lang=\"csharp\" line=\"1\"> \r\nCacheDependency dep1 = new CacheDependency(\r\n Server.MapPath(\"ProductList1.xml\"));\r\nCacheDependency dep2 = new CacheDependency(\r\n Server.MapPath(\"ProductList2.xml\"));\r\n\/\/ Create the aggregate.\r\nCacheDependency[] dependencies = new CacheDependency[]{dep1, dep2};\r\nAggregateCacheDependency aggregateDep = new AggregateCacheDependency();\r\naggregateDep.Add(dependencies);\r\n\/\/ Add the dependent cache item.\r\nCache.Insert(\"ProductInfo\", prodInfo, aggregateDep); \r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>CacheDependency is an important part in pet shop 4.0. Here is some example code on how to use CacheDependency 1. create a new xml file as following: ado.net tutorial wudi ado.net tutorial wudi 2. create a new webform page running … <a href=\"http:\/\/windows.emacslisp.com\/index.php\/2015\/12\/17\/pet-shop-4-0-cachedependency-and-aggregatecachedependency\/\">Continue reading <span class=\"meta-nav\">→<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/posts\/38"}],"collection":[{"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":6,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions"}],"predecessor-version":[{"id":44,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions\/44"}],"wp:attachment":[{"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/media?parent=38"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/categories?post=38"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/windows.emacslisp.com\/index.php\/wp-json\/wp\/v2\/tags?post=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}