ASP.NET C# Write RSS feed for Froogle
I'm trying to create a RSS 2.0 feed in ASP.NET C# with products to provide to Froogle.
The RSS feed should look like:
http://www.google.com/support/merchants/bin/answer.py?answer=160589&hl=en
I'm using the SyndicationFeed and SyndicationsItems to create the feed. But I'm having trouble adding the extra elements like g:image_link.
I try the extra elements like;
开发者_Python百科syndicationItem.ElementExtensions.Add(new XElement("image_link", product.ImageLink).CreateReader());
This works, but how can I add the namespace
xmlns:g="http://base.google.com/ns/1.0"
to the first RSS tag and use this for the extension elements?
Thank you
I just wrote something like this last week, as a matter of fact. I didn't have much time, so it's not optimized or pretty.
I used an XDocument, though.
static XDocument GetXDocument(List<GoogleProduct> googleProducts)
{
XNamespace gns = "http://base.google.com/ns/1.0";
XDocument document = new XDocument(
new XElement("rss",
new XAttribute("version", "2.0"),
new XAttribute(XNamespace.Xmlns + "g", gns),
new XElement("channel",
new XElement("title", "X Company Feed"),
new XElement("description", "X Description"),
new XElement("link", "http://www.somecompany.com/"),
from googleProduct in googleProducts
select new XElement("item",
new XElement("title", googleProduct.Title),
new XElement(gns + "brand", googleProduct.ProductRecommendedAttributes.Brand),
new XElement(gns + "manufacturer", googleProduct.ProductRecommendedAttributes.Manufacturer),
new XElement(gns + "condition", googleProduct.Condition),
new XElement("description", googleProduct.Description),
new XElement(gns + "id", googleProduct.ID),
from img in googleProduct.ProductRecommendedAttributes.ImageLinks
select new XElement(gns + "image_link", img),
new XElement("link", googleProduct.Link),
new XElement(gns + "price", googleProduct.Price.ToString("0.00")),
new XElement(gns + "product_type", googleProduct.ProductRecommendedAttributes.ProductType),
from pmt in googleProduct.ProductOptionalAttributes.PaymentAccepteds
select new XElement(gns + "payment_accepted", pmt)))));
//
return document;
}
(FYI: GoogleProduct is just a temporary mapper class I used)
It will generate a document along these lines
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title>Blah Data Feed</title>
<description>Stuff from Blah</description>
<link>http://www.blah.com/shopping</link>
<item>
<title>Blah</title>
<g:brand>Blah</g:brand>
<g:manufacturer>Blah</g:manufacturer>
<g:condition>New</g:condition>
<description>blah blah</description>
<g:id>268</g:id>
<g:image_link>http://www.blah.com/shopping/images/PRODUCT/medium/268.jpg</g:image_link>
<link>http://www.blah.com/</link>
<g:price>1747.00</g:price>
<g:product_type>Blah Blah</g:product_type>
<g:payment_accepted>Cash</g:payment_accepted>
<g:payment_accepted>Check</g:payment_accepted>
<g:payment_accepted>Visa</g:payment_accepted>
<g:payment_accepted>Mastercard</g:payment_accepted>
</item>
<item>
<title>Blah</title>
<g:brand>Blah</g:brand>
<g:manufacturer>Blah</g:manufacturer>
<g:condition>New</g:condition>
<description>blah blah</description>
<g:id>269</g:id>
<g:image_link>http://www.blah.com/shopping/images/PRODUCT/medium/269.jpg</g:image_link>
<link>http://www.blah.com/</link>
<g:price>1103.00</g:price>
<g:product_type>blah blah</g:product_type>
<g:payment_accepted>Cash</g:payment_accepted>
<g:payment_accepted>Check</g:payment_accepted>
<g:payment_accepted>Visa</g:payment_accepted>
<g:payment_accepted>Mastercard</g:payment_accepted>
</item>
</channel>
</rss>
XElements have great namespace support. Create your first element like this:
XNamespace aw = "http://base.google.com/ns/1.0";
XElement root = new XElement(aw + "image_link", product.ImageLink);
This will give you XML like this:
<image_link xmlns="http://base.google.com/ns/1.0">
</image_link>
Each subsequent element should also use the same namespace. If you want to use namespace prefixes for your elements, it's a similar approach. You can check out some full examples on MSDN here:
How to: Create a Document with Namespaces
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