XML操作
读取：
XmlDocument source = new XmlDocument();
XmlNode objnode;
int i;
string title,href;
//载入新闻列表的XML文件
source.Load(Server.MapPath("contents.xml"));
objnode=source.SelectSingleNode("topiclist");
//生成新闻列表
Response.Write("<Table border=1>") ;
Response.Write("<tr>");
Response.Write("<td>");
Response.Write("标 题");
Response.Write("</td>");
Response.Write("</tr>");
if(objnode.HasChildNodes)
{
for(i=0;i<objnode.ChildNodes.Count;i++)
{
Response.Write("<tr>");
title=objnode.ChildNodes[i].ChildNodes[0].InnerText;
Response.Write("<td><a href=");
href=objnode.ChildNodes[i].ChildNodes[1].InnerText;
Response.Write(href);
Response.Write(" target=main>");
Response.Write(title);
Response.Write("</a>");
Response.Write("</td>");
Response.Write("</tr>") ;
}
}
Response.Write("</table>");
//====================================================================================
写入：
if (File.Exists(Server.MapPath(TextBox1.Text +".xml")))
Response.Write("文件名已经存在，请重新选文件名!");
else
{
//首先将数据插入新闻列表中
XmlNode CurrNode;
XmlDocument xmldoc = new XmlDocument();
//加载索引文件
xmldoc.Load(Server.MapPath("contents.xml"));
string insstr;
//生成新闻索引
insstr="<topic><title>" +TextBox2.Text + "</title><href>main.aspx?name=" +TextBox1.Text + "</href></topic>";
XmlDocumentFragment docFrag =xmldoc.CreateDocumentFragment();
docFrag.InnerXml = insstr;
CurrNode=xmldoc.DocumentElement;
//插入新闻索引队列中
CurrNode.InsertAfter(docFrag, CurrNode.LastChild);
//保存索引文件
xmldoc.Save (Server.MapPath("contents.xml"));
//把TextBox5中的文件换成符合xml格式的内容
string xmlfile;
xmlfile=TextBox5.Text;
xmlfile=xmlfile.Replace("<","+lt; ");
xmlfile=xmlfile.Replace(">","+gt; ") ;
xmlfile=xmlfile.Replace("//","+apos;") ;
xmlfile=xmlfile.Replace ("\r\n","</paragraph><paragraph>");
//把数据写入新建的xml文件中去;
XmlDocument doc;
doc=new XmlDocument() ;
insstr="<?xml version='1.0' encoding='GB2312'?><document><title>" ;
insstr +=TextBox2.Text +"</title><abstract>" + TextBox4.Text ;
insstr +="</abstract><author>" +TextBox3.Text +"</author><content><paragraph>";
insstr +=xmlfile +"</paragraph></content></document>";
doc.LoadXml(insstr) ;
doc.Save (Server.MapPath(TextBox1.Text +".xml")) ;
}
//===========================================================================================
CONTENTS.XML文件：
<?xml version="1.0" encoding="GB2312"?>
<topiclist type="Dreamsite News">
<topic>
<title>欢迎进入星球新闻网!</title>
<href>main.aspx?name=hello</href>
</topic>
<topic>
<title>测试新闻</title>
<href>main.aspx?name=test</href>
</topic>
<topic>
<title> 第一条新闻</title>
<href>main.aspx?name=first</href>
</topic>
<topic>
<title> 第二条新闻</title>
<href>main.aspx?name=second</href>
</topic>
<topic>
<title> 第三条新闻</title>
<href>main.aspx?name=third</href>
</topic>
<topic>
<title>第四条新闻</title>
<href>main.aspx?name=fourth</href>
</topic>
<topic>
<title>第五条新闻</title>
<href>main.aspx?name=fifth</href>
</topic>
<topic>
<title>第八条新闻</title>
<href>main.aspx?name=eighth</href>
</topic>
<topic>
<title>第八条新闻</title>
<href>main.aspx?name=eighth</href>
</topic>
<topic>
<title>第八条新闻</title>
<href>main.aspx?name=eighth</href>
</topic>
<topic>
<title>最后一条新闻</title>
<href>main.aspx?name=last</href>
</topic>
<topic>
<title>大风天气</title>
<href>main.aspx?name=first</href>
</topic>
<topic>
<title>大风</title>
<href>main.aspx?name=first</href>
</topic>
<topic>
<title>sss</title>
<href>main.aspx?name=my.xml</href>
</topic>
<topic>
<title>sss</title>
<href>main.aspx?name=my.xml</href>
</topic>
<topic>
<title>dfsf</title>
<href>main.aspx?name=aa</href>
</topic>
<topic>
<title>a</title>
<href>main.aspx?name=a</href>
</topic>
<topic>
<title>a</title>
<href>main.aspx?name=a</href>
</topic>
<topic>
<title>a</title>
<href>main.aspx?name=a</href>
</topic>
<topic>
<title>a</title>
<href>main.aspx?name=a</href>
</topic>
<topic>
<title>大风</title>
<href>main.aspx?name=first</href>
</topic>
<topic>
<title>太累</title>
<href>main.aspx?name=mynews</href>
</topic>
</topiclist>
//=========================================================================================
private void Page_Load(object sender, System.EventArgs e)
{
ArrayList ar =new ArrayList();
//获取当前目录的路径
string dr =Server.MapPath("./");
//获取当前目录下的所有XML文件
string[] fils =Directory.GetFiles(dr,"*.xml");
string Filename;
int pos ;
pos = dr.Length+1;
//显示当前目录下的新闻文件
for(int i=0;i<fils.Length;i++)
{
Filename=Path.GetFileName(fils[i]);
if( Filename.ToLower()!="contents.xml" )
ar.Add(Filename);
}
dg.DataSource=ar;
dg.DataBind();
}
private void submit_Click(object sender, System.EventArgs e)
{
if(Page.IsValid)
{
XmlDocument Xdoc = new XmlDocument();
XmlNode objnode;
string path,xmlfile;
path=fname.Text;
Xdoc.Load(path);
//替换节点内容
objnode=Xdoc.SelectSingleNode("document");
objnode.ChildNodes[0].InnerText=title.Text;
objnode.ChildNodes[2].InnerText=author.Text;
objnode.ChildNodes[1].InnerText=abs.Text;
xmlfile=cont.Text;
//转换新闻内容格式
xmlfile=xmlfile.Replace("<","< ");
xmlfile=xmlfile.Replace(">","> ") ;
xmlfile=xmlfile.Replace ("\r\n","</paragraph><paragraph>");
xmlfile="<paragraph>" + xmlfile;
xmlfile=xmlfile + "</paragraph>";
objnode.ChildNodes[3].InnerText=xmlfile;
Xdoc.Save(path);
dis.Visible=false;
Response.Write("修改成功!");
}
}
private void dg_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
if( e.CommandName=="update")
{
string href,path,content;
XmlDocument Xdoc = new XmlDocument();
XmlNode objnode;
href=e.Item.Cells[1].Text;
path=Server.MapPath(href);
Xdoc.Load(path);
try
{
//存储文件名
fname.Text=path;
//获取各个节点的值
objnode=Xdoc.SelectSingleNode("document");
title.Text=objnode.ChildNodes[0].InnerText;
author.Text=objnode.ChildNodes[2].InnerText;
abs.Text=objnode.ChildNodes[1].InnerText;
content=objnode.ChildNodes[3].InnerText;
//替换XML格式
content=content.Replace("< ","<");
content=content.Replace("> ",">");
content=content.Replace("</paragraph><paragraph>","\r\n");
content=content.Replace("</paragraph>","");
content=content.Replace("<paragraph>","");
cont.Text=content;
dis.Visible=true;
}
catch( Exception ee)
{
Response.Write(ee.ToString());
}
}
}
//=========================================================================================
Hello.xml文件：
<?xml version="1.0" encoding="GB2312"?>
<document>
<title>欢迎进入星球新闻网!</title>
<abstract>Welcome</abstract>
<author>shaozhd111</author>
<content><paragraph>首先欢迎您进入星球新闻网!</paragraph><paragraph>再次欢迎您进入星球新闻网!</paragraph></content>
</document>
