在Xml序列化后删除空xmlns =""

Question

所以我仍然在问这个话题:-(

所以我创建了一个对象,用Xml序列化属性来装饰它,从我看到的我添加一个空的命名空间到xml序列化namepsace集合,以便不获取我不想要的多余属性.

编辑:我的意思是这些属性:

<url xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns:xsd="http://www.w3.org/2001/XMLSchema"; xmlns="">

所以它给了我两个额外的属性.

经过进一步调查,如果我改变文件的开头:**

writer.WriteStartElement("urlset","http://www.sitemaps.org/schemas/sitemap/0.9");

至

writer.WriteStartElement("urlset");

**然后我没有在url标签中获得空的xmlns =""属性.这很好但是我确实需要根元素xmlns="http://www.sitemaps.org/schemas/sitemap/0.9",即:

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">

但我仍然xmlns=""在序列化类型中获得一个空属性.

[XmlRoot(ElementName = "url", Namespace="")]
public class SitemapNode
{
    [XmlElement(ElementName = "loc")]
    public string Location { get; set; }
    [XmlElement(ElementName = "lastmod")]
    public DateTime LastModified { get; set; }
    [XmlElement(ElementName = "changefreq")]
    public SitemapChangeFrequency ChangeFrequency { get; set; }
    [XmlElement(ElementName = "priority")]
    public decimal Priority { get; set; }

    public SitemapNode()
    {
        Location = String.Empty;
        LastModified = DateTime.Now;
        ChangeFrequency = SitemapChangeFrequency.monthly;
        Priority = 0.5M;
    }

    public SitemapNode(string location, DateTime lastModified, SitemapChangeFrequency changeFrequency, decimal priority)
    {
        Location = location;
        LastModified = lastModified;
        ChangeFrequency = changeFrequency;
        Priority = priority;
    }
}

然后我使用以下内容附加到我的XmlWriter:

foreach (uk.co.andrewrea.SitemapNode node in List)
{
    XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
    ns.Add(String.Empty, String.Empty);
    Serializer.Serialize(Writer, node, ns);
}

这很好,除了我留下像这样的emtpy xmlns =""

<url xmlns="">

任何想法？我可以使用XmlTextWriter和XmlDocument实现这一点,但我需要使用XmlWriter来实现它.

任何帮助是极大的赞赏.

Answer 1

这工作(您只需要它们在同一名称空间中,并使用名称空间类,因此写入程序不会混淆):

[TestMethod]
public void TestMethod3()
{
    var list = new []{new SitemapNode("1", DateTime.Now, 1), new SitemapNode("2", DateTime.Now.AddDays(1), 2)};
    var serializer = new XmlSerializer(typeof(SitemapNode));
    var st = new MemoryStream();
    using (var writer = XmlWriter.Create(st))
    {
        var ns = new XmlSerializerNamespaces();
        ns.Add("", "test");
        writer.WriteStartElement("test", "test");
        foreach (SitemapNode node in list)
        {
            serializer.Serialize(writer, node, ns);
        }
        writer.WriteEndElement();
    }
    st.Position = 0;
    TestContext.WriteLine(new StreamReader(st).ReadToEnd());
}


[XmlRoot(ElementName = "url", Namespace = "test")]
public class SitemapNode
{
    [XmlElement(ElementName = "loc")]
    public string Location { get; set; }
    [XmlElement(ElementName = "lastmod")]
    public DateTime LastModified { get; set; }
    [XmlElement(ElementName = "priority")]
    public decimal Priority { get; set; }

    public SitemapNode()
    {
        Location = String.Empty;
        LastModified = DateTime.Now;
        Priority = 0.5M;
    }

    public SitemapNode(string location, DateTime lastModified, decimal priority)
    {
        Location = location;
        LastModified = lastModified;
        Priority = priority;
    }
}

输出是(基于您的评论,你正在寻找):

    <?xml version="1.0" encoding="utf-8"?><test xmlns="test">
<url><loc>1</loc><lastmod>2009-03-05T13:35:54.6468-07:00</lastmod><priority>1</priority></url>
<url><loc>2</loc><lastmod>2009-03-06T13:35:54.6478-07:00</lastmod><priority>2</priority></url></test>