by Pieter Brinkman
8. July 2009 02:22
In this example I will generate a XML site-map that complies with the sitemap-protocol XML schema.
[code:c#]
//create datasource
List<string> blogPosts = new List<string>{
"http://blog.newguid.net/mypost1.aspx",
"http://blog.newguid.net/mypost_about_Net.aspx",
"http://blog.newguid.net/morePosts.aspx",
"http://blog.newguid.net/andEvenMorePosts.aspx"
};
//Create namespace for sitemap-protocol
XNamespace xmlNS = "http://www.sitemaps.org/schemas/sitemap/0.9";
XDocument xmlDoc =
new XDocument(
new XDeclaration("1.0", "UTF-8", null),
new XElement(xmlNS + "urlset",
from blogPostUrl in blogPosts
select
new XElement(xmlNS + "url",
new XElement(xmlNS + "loc", blogPostUrl))
));
//Show output
Response.Write(xmlDoc);
[/code]
This example will give the following output:
[code:xml]
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <url> <loc>http://blog.newguid.net/mypost1.aspx</loc> </url> <url> <loc>http://blog.newguid.net/mypost_about_Net.aspx</loc> </url> <url> <loc>http://blog.newguid.net/morePosts.aspx</loc> </url> <url> <loc>http://blog.newguid.net/andEvenMorePosts.aspx</loc> </url></urlset>
[/code]
To keep the example as simple as possible I only use the LOC element of the URL node. In the real world you can implement the lastmod, changefreq and priority node.
More information about the sitemap-protocol.
by Pieter Brinkman
26. November 2008 05:39
For a new project I needed to implement show data from RSS. The site will be hosted on a shared hosting environment with medium trust.
I load the rss with the following code:
XElement rssFeed = XElement.Load("[REPLACE WITH URL TO RSS]");
var posts = from item in rssFeed.Descendants("item")
select new
{
Title = item.Element("title").Value,
Description = item.Element("description").Value
};
This normally works fine for me... But apparently not with medium trust :-(! I got the following error.
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
After reading a bit and playing with the web.config setting <TRUST /> I found the solution. The solution is putting a ".*" in the originUrl parameter of the trust node.
<trust level="Medium" originUrl=".*" />
So an easy solution for a annoying problem what took me to much time. So I hope this post will help somebody out there :-)
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