C# RSS阅读器对节点的部分读取

下面是我一直在编写的一些代码，但它并没有读取RSS提要中的所有XML节点。仅显示第一个节点：

使用SyndicationFeed和Using系统服务模型

 public class RssNews
    {
        public string Title;
        public string Description;
        public string Publication;
    }

    private string RSS()
    {
        XmlDocument rssXmlDoc = new XmlDocument();
        rssXmlDoc.Load("http://www.hamqsl.com/solarrss.php");

        XmlNodeList rssNodes = rssXmlDoc.SelectNodes("rss/channel/item");
        StringBuilder rssContent = new StringBuilder();

        foreach (XmlNode rssNode in rssNodes)
        {
            XmlNode rssSubNode = rssNode.SelectSingleNode("title");
            string title = rssSubNode != null ? rssSubNode.InnerText : "";

            rssSubNode = rssNode.SelectSingleNode("item");
            string item = rssSubNode != null ? rssSubNode.InnerText : "";

            rssSubNode = rssNode.SelectSingleNode("description");
            string description = rssSubNode != null ? rssSubNode.InnerText : "";

            rssContent.Append("<a href='" + item + "'>" + title + "</a><br>" + description);


        }
        return rssContent.ToString();
    }
    private void btCurrentData_Click(object sender, RoutedEventArgs e)
    {
        tbRSS.Text = RSS();

    }

公共类RssNews
{
公共字符串标题；
公共字符串描述；
公共字符串出版物；
}
私有字符串RSS（）
{
XmlDocument rssXmlDoc=新的XmlDocument（）；
rssXmlDoc.Load（“http://www.hamqsl.com/solarrss.php");
XmlNodeList rssNodes=rssXmlDoc.SelectNodes（“rss/channel/item”）；
StringBuilder rssContent=新建StringBuilder（）；
foreach（rssNodes中的XmlNode rssNode）
{
XmlNode rssSubNode=rssNode.SelectSingleNode（“标题”）；
字符串title=rssSubNode！=null？rssSubNode.InnerText:；
rssSubNode=rssNode.SelectSingleNode（“项目”）；
字符串项=rssSubNode！=null？rssSubNode.InnerText:；
rssSubNode=rssNode.SelectSingleNode（“说明”）；
字符串描述=rssSubNode！=null？rssSubNode.InnerText:；
rssContent.Append（“
”+说明）；
}
返回rssContent.ToString（）；
}
私有无效btCurrentData_单击（对象发送方，路由目标e）
{
tbRSS.Text=RSS（）；
}

您可以看到完整的xml 例如，在firefox中使用view source

查看源代码：http://www.hamqsl.com/solarrss.php

您正在阅读

rss/channel/item

。在这个标题下，只有一个

标题

，因此您只能单独获取该数据

我假设您想阅读

solardata

，其路径是：

rss/channel/item/solar/solardata

e、 g

逻辑是查看实际的Xml，然后确定要在顶层选择哪个节点，然后查看其所有

ChildNodes

完整的XML供参考：

<?xml version="1.0" encoding="UTF-8" ?> 
<rss version="0.91">
    <channel>
        <title>HAMQSL.com Solar Data RSS Feed</title> 
        <link>http://www.hamqsl.com/solarrss.php</link> 
        <description>Solar Data RSS Feed Updates</description> 
        <language>en-us</language> 
        <item>
            <title>HAMQSL.com Solar Data</title> 
            <solar>
                <solardata>
                    <source url="http://www.hamqsl.com/solar.html">N0NBH</source>
                    <updated> 12 Aug 2018 0508 GMT</updated>
                    <solarflux>67</solarflux>
                    <aindex> 10</aindex>
                    <kindex> 4</kindex>
                    <kindexnt>No Report</kindexnt>
                    <xray> A1.1   </xray>
                    <sunspots>0</sunspots>
                    <heliumline> 94.1</heliumline>
                    <protonflux>1.82e-01</protonflux>
                    <electonflux>2.82e+00</electonflux>
                    <aurora> 1</aurora>
                    <normalization>1.99</normalization>
                    <latdegree>67.5</latdegree>
                    <solarwind>392.2</solarwind>
                    <magneticfield>  0.2</magneticfield>
                    <calculatedconditions>
                        <band name="80m-40m" time="day">Poor</band>
                        <band name="30m-20m" time="day">Poor</band>
                        <band name="17m-15m" time="day">Poor</band>
                        <band name="12m-10m" time="day">Poor</band>
                        <band name="80m-40m" time="night">Fair</band>
                        <band name="30m-20m" time="night">Poor</band>
                        <band name="17m-15m" time="night">Poor</band>
                        <band name="12m-10m" time="night">Poor</band>
                    </calculatedconditions>
                    <calculatedvhfconditions>
                        <phenomenon name="vhf-aurora" location="northern_hemi">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="north_america">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe_6m">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe_4m">Band Closed</phenomenon>
                    </calculatedvhfconditions>
                    <geomagfield>ACTIVE</geomagfield>
                    <signalnoise>S3-S4</signalnoise>
                    <fof2> 4.4</fof2>
                    <muffactor> 3.11</muffactor>
                    <muf>13.68</muf>
                </solardata>
            </solar>
        </item>
    </channel>
</rss>

HAMQSL.com太阳能数据RSS源
http://www.hamqsl.com/solarrss.php 
Solar数据RSS源更新
恩美
太阳数据
N0NBH
2018年8月12日格林尼治标准时间0508
67
10
4.
没有报告
A1.1
0
94.1
1.82e-01
2.82e+00
1.
1.99
67.5
392.2
0.2
贫穷的
贫穷的
贫穷的
贫穷的
公平的
贫穷的
贫穷的
贫穷的
封闭式
封闭式
封闭式
封闭式
封闭式
活跃的
S3-S4
4.4
3.11
13.68

<?xml version="1.0" encoding="UTF-8" ?> 
<rss version="0.91">
    <channel>
        <title>HAMQSL.com Solar Data RSS Feed</title> 
        <link>http://www.hamqsl.com/solarrss.php</link> 
        <description>Solar Data RSS Feed Updates</description> 
        <language>en-us</language> 
        <item>
            <title>HAMQSL.com Solar Data</title> 
            <solar>
                <solardata>
                    <source url="http://www.hamqsl.com/solar.html">N0NBH</source>
                    <updated> 12 Aug 2018 0508 GMT</updated>
                    <solarflux>67</solarflux>
                    <aindex> 10</aindex>
                    <kindex> 4</kindex>
                    <kindexnt>No Report</kindexnt>
                    <xray> A1.1   </xray>
                    <sunspots>0</sunspots>
                    <heliumline> 94.1</heliumline>
                    <protonflux>1.82e-01</protonflux>
                    <electonflux>2.82e+00</electonflux>
                    <aurora> 1</aurora>
                    <normalization>1.99</normalization>
                    <latdegree>67.5</latdegree>
                    <solarwind>392.2</solarwind>
                    <magneticfield>  0.2</magneticfield>
                    <calculatedconditions>
                        <band name="80m-40m" time="day">Poor</band>
                        <band name="30m-20m" time="day">Poor</band>
                        <band name="17m-15m" time="day">Poor</band>
                        <band name="12m-10m" time="day">Poor</band>
                        <band name="80m-40m" time="night">Fair</band>
                        <band name="30m-20m" time="night">Poor</band>
                        <band name="17m-15m" time="night">Poor</band>
                        <band name="12m-10m" time="night">Poor</band>
                    </calculatedconditions>
                    <calculatedvhfconditions>
                        <phenomenon name="vhf-aurora" location="northern_hemi">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="north_america">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe_6m">Band Closed</phenomenon>
                        <phenomenon name="E-Skip" location="europe_4m">Band Closed</phenomenon>
                    </calculatedvhfconditions>
                    <geomagfield>ACTIVE</geomagfield>
                    <signalnoise>S3-S4</signalnoise>
                    <fof2> 4.4</fof2>
                    <muffactor> 3.11</muffactor>
                    <muf>13.68</muf>
                </solardata>
            </solar>
        </item>
    </channel>
</rss>