Recently I made an RSS online aggregator. Most RSS 2.0 encoded XML encoded .NET compilers can read it correctly, but some, such as GBK encoding, our. NET cannot read it. If you manually change the XML encoding to "gb2312" or other encoding, it cannot be read. However, whether the encoding changes or not, IE can view it correctly. What to do next is really hard for me. How about changing the encoding? The RSS 2.0 files that my RSS online aggregator wants to read are not downloaded to local files, but read online. Well, after getting the connection, you can use the stream to get the correctly encoded XML stream. See the code below:
1 private void Page_Load(object sender, System.EventArgs e) 2 { 3 rssRepeater.DataSource = ReturnReadResult( Request[ "url" ] ); 4 rssRepeater.DataBind( ); 5 } 6 7 private DataTable ReturnReadResult( string rssUrl ) 8 { 9 //构在DataTable表格 10 DataTable dt = CreateDataTable(); 11 DataRow dr; 12 13 try 14 { 15 XmlDocument xml = new XmlDocument(); 16 17 //正常加载完全合格的RSS 2.0文件 18 try 19 { 20 xml.LoadXml( rssUrl ); 21 } 22 catch 23 { 24 //下面的措施 针对一些特别的RSS 2.0文件,比如下面的一个站点: 25 //site :http://www.csdn.net/rss/rssfeed.aspx? rssid=1&bigclassid=14 26 //按照常规是无法正 常加载的。需要进一步处理。比如一些.NET暂时不支持的编码,目前可以读取所 知的RSS 2.0 27 rssUrl = "http://soft.yesky.com/index.xml"; 28 System.Net.WebRequest wr = System.Net.WebRequest.Create( rssUrl ); 29 System.Net.WebResponse srp = wr.GetResponse (); 30 //加入了把原先编码都转化成了2312gb形式。 31 StreamReader sr = new StreamReader( srp.GetResponseStream() ,System.Text.Encoding.GetEncoding( "gb2312" )); 32 33 xml.LoadXml( sr.ReadToEnd( ).Trim( ) ); 34 sr.Close(); 35 srp.Close(); 36 } 37 38 //读取总标题信息,可以判断是否有图片展示 39 try 40 { 41 titleLabel.Text = xml.SelectSingleNode ("/rss/channel/title").InnerText 42 + "<br><a href = " 43 + xml.SelectSingleNode("//image/link").InnerText 44 + ">" 45 + "<img src=" 46 + xml.SelectSingleNode("//image/url").InnerText 47 + " border = no></a><br>" 48 + xml.SelectSingleNode ("/rss/channel/description").InnerText 49 + "<br>" 50 + xml.SelectSingleNode("/rss/channel/link").InnerText; 51 } 52 catch 53 { 54 try 55 { 56 titleLabel.Text = xml.SelectSingleNode ("/rss/channel/title").InnerText 57 + "<br>" 58 + xml.SelectSingleNode("/rss/channel/description").InnerText 59 + "<br>" 60 + xml.SelectSingleNode ("/rss/channel/link").InnerText; 61 } 62 catch 63 { 64 //假如没有频道进行说明的情况下 65 titleLabel.Text = xml.SelectSingleNode ("/rss/channel/title").InnerText 66 + "<br>" 67 + xml.SelectSingleNode("/rss/channel/link").InnerText; 68 } 69 } 70 71 XmlNodeList nodes = xml.SelectNodes("//item"); 72 73 foreach( XmlNode item in nodes ) 74 { 75 dr = dt.NewRow(); 76 foreach( XmlNode child in item.ChildNodes ) 77 { 78 79 switch( child.Name ) 80 { 81 case "title": 82 dr[ "title" ] = child.InnerText; 83 break; 84 case "link": 85 dr[ "link" ] = child.InnerText; 86 break; 87 case "author": 88 dr[ "author" ] = child.InnerText; 89 break; 90 case "guid": 91 dr[ "guid" ] = child.InnerText; 92 break; 93 case "category": 94 dr[ "category" ] = child.InnerText; 95 break; 96 case "pubDate": 97 dr[ "pubDate" ] = child.InnerText; 98 break; 99 case "description": 100 dr[ "description" ] = child.InnerText; 101 break; 102 case "comments": 103 dr[ "comments" ] = child.InnerText; 104 break; 105 } 106 } 107 dt.Rows.Add( dr ); 108 } 109 return dt; 110 } 111 catch ( Exception ex ) 112 { 113 Response.Write( ex.ToString( ) ); 114 return null; 115 } 116 } 117 118//手动创立一个DataTable 119 private DataTable CreateDataTable() 120 { 121 DataTable dt = new DataTable(); 122 DataColumn dc; 123 124 System.Type type; 125 type = System.Type.GetType("System.String"); 126 127 dc = new DataColumn( "title",type ); 128 dt.Columns.Add( dc ); 129 130 dc = new DataColumn( "link", type ); 131 dt.Columns.Add( dc ); 132 133 dc = new DataColumn( "author", type ); 134 dt.Columns.Add( dc ); 135 136 dc = new DataColumn( "guid", type ); 137 dc.DefaultValue = ""; 138 dt.Columns.Add( dc ); 139 140 dc = new DataColumn( "category", type ); 141 dc.AllowDBNull = true; 142 dt.Columns.Add( dc ); 143 144 dc = new DataColumn( "pubDate", type ); 145 dt.Columns.Add( dc ); 146 147 dc = new DataColumn( "description", type ); 148 dc.AllowDBNull = true; 149 dt.Columns.Add( dc ); 150 151 dc = new DataColumn( "comments", type ); 152 dc.AllowDBNull = true; 153 dt.Columns.Add( dc ); 154 155 return dt; 156 }
After processing in this way, most RSS 2.0 connections can be read.
As for processing local files, use StreamReader stream conversion encoding, the same process.
The core is to use stream conversion encoding.
The above is the detailed content of Sample code sharing for XmlDocument XML encoding conversion. For more information, please follow other related articles on the PHP Chinese website!

RSS and XML are tools for web content management. RSS is used to publish and subscribe to content, and XML is used to store and transfer data. They work with content publishing, subscriptions, and update push. Examples of usage include RSS publishing blog posts and XML storing book information.

RSS documents are XML-based structured files used to publish and subscribe to frequently updated content. Its main functions include: 1) automated content updates, 2) content aggregation, and 3) improving browsing efficiency. Through RSSfeed, users can subscribe and get the latest information from different sources in a timely manner.

The XML structure of RSS includes: 1. XML declaration and RSS version, 2. Channel (Channel), 3. Item. These parts form the basis of RSS files, allowing users to obtain and process content information by parsing XML data.

RSSfeedsuseXMLtosyndicatecontent;parsingtheminvolvesloadingXML,navigatingitsstructure,andextractingdata.Applicationsincludebuildingnewsaggregatorsandtrackingpodcastepisodes.

RSS documents work by publishing content updates through XML files, and users subscribe and receive notifications through RSS readers. 1. Content publisher creates and updates RSS documents. 2. The RSS reader regularly accesses and parses XML files. 3. Users browse and read updated content. Example of usage: Subscribe to TechCrunch's RSS feed, just copy the link to the RSS reader.

The steps to build an RSSfeed using XML are as follows: 1. Create the root element and set the version; 2. Add the channel element and its basic information; 3. Add the entry element, including the title, link and description; 4. Convert the XML structure to a string and output it. With these steps, you can create a valid RSSfeed from scratch and enhance its functionality by adding additional elements such as release date and author information.

The steps to create an RSS document are as follows: 1. Write in XML format, with the root element, including the elements. 2. Add, etc. elements to describe channel information. 3. Add elements, each representing a content entry, including,,,,,,,,,,,. 4. Optionally add and elements to enrich the content. 5. Ensure the XML format is correct, use online tools to verify, optimize performance and keep content updated.

The core role of XML in RSS is to provide a standardized and flexible data format. 1. The structure and markup language characteristics of XML make it suitable for data exchange and storage. 2. RSS uses XML to create a standardized format to facilitate content sharing. 3. The application of XML in RSS includes elements that define feed content, such as title and release date. 4. Advantages include standardization and scalability, and challenges include document verbose and strict syntax requirements. 5. Best practices include validating XML validity, keeping it simple, using CDATA, and regularly updating.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

WebStorm Mac version
Useful JavaScript development tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.