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XmlTextWriterFlush操作和重设MemoryStreamPosition =
C#
<%@ Page Language=C#%>
<%@ Import Namespace=SystemXml %>
<%@ Import Namespace=SystemIO %>
<!DOCTYPE html PUBLIC //WC//DTD XHTML Transitional//EN transitionaldtd>
<script runat=server>
protected void Button_Click(object sender EventArgs e)
{
ResponseClear();
ResponseContentType = text/xml;
MemoryStream msXml = new MemoryStream();
XmlTextWriter xmlWriter = new XmlTextWriter(msXml EncodingUTF);
xmlWriterWriteStartElement(rss);
xmlWriterWriteAttributeString(version );
xmlWriterWriteStartElement(channel);
xmlWriterWriteElementString(title 【孟宪会之精彩世界】);
xmlWriterWriteElementString(link /Rssaspx);
xmlWriterWriteElementString(description NET开发技术);
xmlWriterWriteElementString(language zhCN);
xmlWriterWriteElementString(copyright Copyright 【孟宪会之精彩世界】);
xmlWriterWriteElementString(managingEditor amxh[AT]);
xmlWriterWriteStartElement(image);
xmlWriterWriteElementString(title 【孟宪会之精彩世界】);
xmlWriterWriteElementString(width );
xmlWriterWriteElementString(height );
xmlWriterWriteElementString(link /);
xmlWriterWriteElementString(url _//gif);
xmlWriterWriteEndElement();
//循环读出数据库内容列表忽略
//while (objReaderRead())
//{
// xmlWriterWriteStartElement(item);
// xmlWriterWriteElementString(title objReaderGetString());
// xmlWriterWriteElementString(description objReaderGetString());
// xmlWriterWriteElementString(link /article/abceecadc/readaspx);
// xmlWriterWriteElementString(pubDate objReaderGetDateTime()ToString(G));
// xmlWriterWriteEndElement();
//}
//objReaderClose();
xmlWriterWriteStartElement(item);
xmlWriterWriteElementString(title ASPNET 中直接将Access数据库导入到Excel文件中);
xmlWriterWriteElementString(description ASPNET 中直接将Access数据库导入到Excel文件中);
xmlWriterWriteElementString(link /article/abceecadc/readaspx);
xmlWriterWriteElementString(pubDate Sat Dec :: GMT);
xmlWriterWriteEndElement();
xmlWriterWriteEndElement();
xmlWriterWriteEndElement();
xmlWriterFlush(); // 确保书写器更新到Stream中
msXmlPosition = ; // 重置流的位置以便我们可以从头读取
XmlReader xmlReader = XmlReaderCreate(msXml);
while (xmlReaderRead())
{
if (xmlReaderName == rss)
{
ResponseWrite(xmlReaderReadOuterXml());
}
}
ResponseEnd();
msXmlClose();
xmlWriterClose();
xmlReaderClose();
}
</script>
<html xmlns=>
<head runat=server>
<title>XmlReader 读取器读取内存流 MemoryStream 的注意事项</title>
</head>
<body>
<form id=form runat=server>
<asp:Button ID=Button runat=server OnClick=Button_Click Text=读取数据 />
</form>
</body>
</html>
VBNET
Protected Sub Button_Click(ByVal sender As Object ByVal e As EventArgs)
ResponseClear
ResponseContentType = text/xml
Dim msXml As MemoryStream = New MemoryStream
Dim xmlWriter As XmlTextWriter = New XmlTextWriter(msXml EncodingUTF)
xmlWriterWriteStartElement(rss)
xmlWriterWriteAttributeString(version )
xmlWriterWriteStartElement(channel)
xmlWriterWriteElementString(title 【孟宪会之精彩世界】)
xmlWriterWriteElementString(link /Rssaspx)
xmlWriterWriteElementString(description NET开发技术)
xmlWriterWriteElementString(language zhCN)
xmlWriterWriteElementString(copyright Copyright 【孟宪会之精彩世界】)
xmlWriterWriteElementString(managingEditor amxh[AT])
xmlWriterWriteStartElement(image)
xmlWriterWriteElementString(title 【孟宪会之精彩世界】)
xmlWriterWriteElementString(width )
xmlWriterWriteElementString(height )
xmlWriterWriteElementString(link /)
xmlWriterWriteElementString(url _//gif)
xmlWriterWriteEndElement
xmlWriterWriteStartElement(item)
xmlWriterWriteElementString(title ASPNET 中直接将Access数据库导入到Excel文件中)
xmlWriterWriteElementString(description ASPNET 中直接将Access数据库导入到Excel文件中)
xmlWriterWriteElementString(link /article/abceecadc/readaspx)
xmlWriterWriteElementString(pubDate Sat Dec :: GMT)
xmlWriterWriteEndElement
xmlWriterWriteEndElement
xmlWriterWriteEndElement
xmlWriterFlush
msXmlPosition =
Dim xmlReader As XmlReader = XmlReaderCreate(msXml)
While xmlReaderRead
If xmlReaderName = rss Then
ResponseWrite(xmlReaderReadOuterXml)
End If
End While
ResponseEnd
msXmlClose
xmlWriterClose
xmlReaderClose
End Sub
