MemoryStream对象提供了无需进行IO就可以创建Stream的方法,
xmlTextWriter和
xmlReader提供快速书写和读取
xml内容的方法,结合MemoryStream,就可以直接在内存中构造
xmlTextWriter,并用
xmlReader进行读取。
使用MemoryStream和
xmlTextWriter进行书写
xml,需要注意两点:
xmlTextWriter.Flush操作和重设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 ms
xml = new MemoryStream();
xmlTextWriter
xmlWriter = new
xmlTextWriter(ms
xml, Encoding.UTF8);
xmlWriter.WriteStartElement("rss");
xmlWriter.WriteAttributeString("version", "2.0");
xmlWriter.WriteStartElement("channel");
xmlWriter.WriteElementString("title", "【孟宪会之精彩世界】");
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/Rss.aspx");
xmlWriter.WriteElementString("description", "NET开发技术。");
xmlWriter.WriteElementString("language", "zh-CN");
xmlWriter.WriteElementString("copyright", "Copyright 1999-2007【孟宪会之精彩世界】");
xmlWriter.WriteElementString("managingEditor", "amxh[AT]21cn.com");
xmlWriter.WriteStartElement("image");
xmlWriter.WriteElementString("title", "【孟宪会之精彩世界】");
xmlWriter.WriteElementString("width", "144");
xmlWriter.WriteElementString("height", "35");
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/");
xmlWriter.WriteElementString("url", "http://dotnet.chinaitlab.com/UploadFiles_6597/200612/20061221105058663.gif");
xmlWriter.WriteEndElement();
//循环读出数据库内容列表,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");
xmlWriter.WriteElementString("title", "ASP.NET 2.0中直接将Access数据库导入到Excel文件中");
xmlWriter.WriteElementString("description", "ASP.NET 2.0中直接将Access数据库导入到Excel文件中");
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(); // 确保书写器更新到Stream中;
ms
xml.Position = 0; // 重置流的位置,以便我们可以从头读取
xmlReader
xmlReader =
xmlReader.Create(ms
xml);
while (
xmlReader.Read())
{
if (
xmlReader.Name == "rss")
{
Response.Write(
xmlReader.ReadOuter
xml());
}
}
Response.End();
ms
xml.Close();
xmlWriter.Close();
xmlReader.Close();
}
</script>
<html
xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>
xmlReader
读取器读取
内存流 MemoryStream 的注意事项</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="读取数据" />
</form>
</body>
</html>
VB.NET
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
Response.Clear
Response.ContentType = "text/
xml"
Dim ms
xml As MemoryStream = New MemoryStream
Dim
xmlWriter As
xmlTextWriter = New
xmlTextWriter(ms
xml, Encoding.UTF8)
xmlWriter.WriteStartElement("rss")
xmlWriter.WriteAttributeString("version", "2.0")
xmlWriter.WriteStartElement("channel")
xmlWriter.WriteElementString("title", "【孟宪会之精彩世界】")
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/Rss.aspx")
xmlWriter.WriteElementString("description", "NET开发技术。")
xmlWriter.WriteElementString("language", "zh-CN")
xmlWriter.WriteElementString("copyright", "Copyright 1999-2007【孟宪会之精彩世界】")
xmlWriter.WriteElementString("managingEditor", "amxh[AT]21cn.com")
xmlWriter.WriteStartElement("image")
xmlWriter.WriteElementString("title", "【孟宪会之精彩世界】")
xmlWriter.WriteElementString("width", "144")
xmlWriter.WriteElementString("height", "35")
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/")
xmlWriter.WriteElementString("url", "http://dotnet.chinaitlab.com/UploadFiles_6597/200612/20061221105058663.gif")
xmlWriter.WriteEndElement
xmlWriter.WriteStartElement("item")
xmlWriter.WriteElementString("title", "ASP.NET 2.0中直接将Access数据库导入到Excel文件中")
xmlWriter.WriteElementString("description", "ASP.NET 2.0中直接将Access数据库导入到Excel文件中")
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
ms
xml.Position = 0
Dim
xmlReader As
xmlReader =
xmlReader.Create(ms
xml)
While
xmlReader.Read
If
xmlReader.Name = "rss" Then
Response.Write(
xmlReader.ReadOuter
xml)
End If
End While
Response.End
ms
xml.Close
xmlWriter.Close
xmlReader.Close
End Sub