Home > Developer > .Net Core

Precautions for XmlReader to read memory stream MemoryStream

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

The MemoryStream object provides a method to create Stream without IO. XmlTextWriter and XmlReader provide a method to quickly write and read XML content. Combined with MemoryStream, XmlTextWriter can be directly constructed in the memory, read data using XmlReader.

Use MemoryStream and XmlTextWriter to write XML. Pay attention to the following two points: XmlTextWriter. Flush operation and reset MemoryStream. Position = 0.

C #
<% @ Page Language = "C #" %>
<% @ Import Namespace = "System. Xml" %>
<% @ Import Namespace = "System. IO" %>
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Script runat = "server">
Protected void button#click (object sender, EventArgs e)
{
Response. Clear ();
Response. ContentType = "text/xml ";
MemoryStream msXml = new MemoryStream ();
XmlTextWriter xmlWriter = new XmlTextWriter (msXml, Encoding. UTF8 );
XmlWriter. WriteStartElement ("rss ");
XmlWriter. WriteAttributeString ("edition", "2.0 ");
XmlWriter. WriteStartElement ("channel ");
XmlWriter. WriteElementString ("title", "wonderful world of Meng xianhui ]");
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc/Rss.aspx ");
XmlWriter. WriteElementString ("description", "NET development technology. ");
XmlWriter. WriteElementString ("language", "zh-CN ");
XmlWriter. WriteElementString ("copyright", "Copyright [wonderful world of Meng xianhui ]");
XmlWriter. WriteElementString ("managingEditor", "amxh [AT] 21cn.com ");
XmlWriter. WriteStartElement ("image ");
XmlWriter. WriteElementString ("title", "wonderful world of Meng xianhui ]");
XmlWriter. WriteElementString ("width", "144 ");
XmlWriter. WriteElementString ("height", "35 ");
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc /");
XmlWriter. WriteElementString ("url", "http://dotnet.aspx.cc/Images/LogoRss.gif ");
XmlWriter. WriteEndElement ();

// Read the database content list cyclically, ignore
// While (objReader. Read ())
//{
// XmlWriter. WriteStartElement ("item ");
// XmlWriter. WriteElementString ("title", objReader. GetString (0 ));
// XmlWriter. WriteElementString ("description", objReader. GetString (1 ));
// XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc/article/a933b187-06c3-4263-9eec-414a54d9c815/read.aspx ");
// XmlWriter. WriteElementString ("pubDate", objReader. GetDateTime (3). ToString ("G "));
// XmlWriter. WriteEndElement ();
//}
// ObjReader. Close ();
XmlWriter. WriteStartElement ("item ");
XmlWriter. WriteElementString ("title", "import the Access database directly to an Excel file in ASP. NET 2.0 ");
XmlWriter. WriteElementString ("description", "import the Access database directly to an Excel file in ASP. NET 2.0 ");
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc/article/a933b187-06c3-4263-9eec-414a54d9c815/read.aspx ");
XmlWriter. WriteElementString ("pubDate", "Sat, 02 Dec 2006 09:39:58 GMT ");
XmlWriter. WriteEndElement ();
XmlWriter. WriteEndElement ();
XmlWriter. WriteEndElement ();
XmlWriter. Flush (); // ensure that the writer is updated to Stream;
MsXml. Position = 0; // reset the stream Position so that we can read from scratch
XmlReader xmlReader = XmlReader. Create (msXml );
While (xmlReader. Read ())
{
If (xmlReader. Name = "rss ")
{
Response. Write (xmlReader. ReadOuterXml ());
}
}
Response. End ();
MsXml. Close ();
XmlWriter. Close ();
XmlReader. Close ();
}
</Script>

<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> precautions for XmlReader to read memory stream MemoryStream </title>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Asp: Button ID = "Button1" runat = "server" OnClick = "button#click" Text = "read data"/>
</Form>
</Body>
</Html>
VB. NET

Protected Sub button#click (ByVal sender As Object, ByVal e As EventArgs)
Response. Clear
Response. ContentType = "text/xml"
Dim msXml As MemoryStream = New MemoryStream
Dim xmlWriter As XmlTextWriter = New XmlTextWriter (msXml, Encoding. UTF8)
XmlWriter. WriteStartElement ("rss ")
XmlWriter. WriteAttributeString ("version", "2.0 ")
XmlWriter. WriteStartElement ("channel ")
XmlWriter. WriteElementString ("title", "wonderful world of Meng xianhui ]")
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc/Rss.aspx ")
XmlWriter. WriteElementString ("description", "NET development technology. ")
XmlWriter. WriteElementString ("language", "zh-CN ")
XmlWriter. WriteElementString ("copyright", "Copyright [wonderful world of Meng xianhui ]")
XmlWriter. WriteElementString ("managingEditor", "amxh [AT] 21cn.com ")
XmlWriter. WriteStartElement ("image ")
XmlWriter. WriteElementString ("title", "wonderful world of Meng xianhui ]")
XmlWriter. WriteElementString ("width", "144 ")
XmlWriter. WriteElementString ("height", "35 ")
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc /")
XmlWriter. WriteElementString ("url", "http://dotnet.aspx.cc/Images/LogoRss.gif ")
XmlWriter. WriteEndElement
XmlWriter. WriteStartElement ("item ")
XmlWriter. WriteElementString ("title", "import an Access database directly to an Excel file in ASP. NET 2.0 ")
XmlWriter. WriteElementString ("description", "directly import the Access database to an Excel file in ASP. NET 2.0 ")
XmlWriter. WriteElementString ("link", "http://dotnet.aspx.cc/article/a933b187-06c3-4263-9eec-414a54d9c815/read.aspx ")
XmlWriter. WriteElementString ("pubDate", "Sat, 02 Dec 2006 09:39:58 GMT ")
XmlWriter. WriteEndElement
XmlWriter. WriteEndElement
XmlWriter. WriteEndElement
XmlWriter. Flush
MsXml. Position = 0
Dim xmlReader As XmlReader = XmlReader. Create (msXml)
While xmlReader. Read
If xmlReader. Name = "rss" Then
Response. Write (xmlReader. ReadOuterXml)
End If
End While
Response. End
MsXml. Close
XmlWriter. Close
XmlReader. Close
End Sub

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
unable to read security descriptors data stream php xmlreader to array xmldocument to xmlreader xmlreader to string php read stream hp stream memory card failed to open input stream for file
Related Article
asp.net Core Data protection (the data Protection cluster sce...
asp.net core-authorize characteristics
Micro-service Monitoring zipkin+asp.net core
Combine ASP NET Core and SQL Server with Docker Compose
ASP. net mvc creates 404 jump instances (not 302 and 200), mv...
Comparison between Orchard and ABP architectures (aspnetboile...

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More