XmlReader 讀取器讀取內存流 MemoryStream 的注意事項
2024-07-10 12:40:14
供稿：網友
MemoryStream對象提供了無需進行IO就可以創建Stream的方法，XmlTextWriter和XmlReader提供快速書寫和讀取XML內容的方法，結合MemoryStream，就可以直接在內存中構造XmlTextWriter，并用XmlReader進行讀取。
使用MemoryStream和XmlTextWriter進行書寫XML,需要注意兩點：XmlTextWriter.Flush操作和重設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 Button1_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("version", "2.0");
xmlWriter.WriteStartElement("channel");
xmlWriter.WriteElementString("title", "【孟憲會之精彩世界】");
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/Rss.aspx");
xmlWriter.WriteElementString("description", "NET開發技術。");
xmlWriter.WriteElementString("language", "zh-CN");
xmlWriter.WriteElementString("copyright", "Copyright 1999-2007【孟憲會之精彩世界】");
xmlWriter.WriteElementString("managingEditor", "amxh[AT]21cn.com");
xmlWriter.WriteStartElement("image");
xmlWriter.WriteElementString("title", "【孟憲會之精彩世界】");
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();
//循環讀出數據庫內容列表，忽略
//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");
