Question

我正在尝试使用要提供给Froogle的产品在ASP.NET C＃中创建RSS 2.0提要。

RSS Feed应如下所示：

http://www.google.com/support/merchants/bin/answer.py?answer=160589&hl=en

我正在使用SyndicationFeed和SyndicationsItems来创建Feed。但是我无法添加额外的元素，比如g：image_link。

我尝试了额外的元素，如;

syndicationItem.ElementExtensions.Add(new XElement("image_link", product.ImageLink).CreateReader());

这有效，但如何添加命名空间

的xmlns：克= “http://base.google.com/ns/1.0”

到第一个RSS标记并将其用于扩展元素？

谢谢

Answer 1

XElements具有出色的命名空间支持。像这样创建你的第一个元素：

XNamespace aw = "http://base.google.com/ns/1.0";
XElement root = new XElement(aw + "image_link", product.ImageLink);

这将为您提供如下XML：

<image_link xmlns="http://base.google.com/ns/1.0">
</image_link>

每个后续元素也应使用相同的命名空间。如果要为元素使用名称空间前缀，则采用类似的方法。您可以在这里查看MSDN上的一些完整示例：

How to: Create a Document with Namespaces

Answer 2

事实上，我上周刚刚写了这样的内容。我没有太多时间，所以它没有优化或漂亮。

但我使用了XDocument。

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;
}

（仅供参考：GoogleProduct只是我使用的临时映射器类）

它将沿着这些行生成文档

<?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>

ASP.NET C＃为Froogle编写RSS提要

2 个答案: