Reading and updating XML files in Asp.net

1. Example XML file model. xml
<? XML version = "1.0" encoding = "UTF-8"?>
<Drroot>
<Sitename> XML operation example </sitename>
<Siteurl> www.abc.com.cn </siteurl>
<Sitedescript>. Net Open Source Forum </sitedescript>
<Sitekeyword> XML operation example </sitekeyword>
<Filetype> GIF | JPG | RAR </filetype>
& Lt; filesize & gt; 1024 & lt;/filesize & gt;
<Filters> script | IFRAME </Filters>
<Filterevent> onload | onmouseover </filterevent>
<Badwords> admin | webmaster | drbbs </badwords>
<Disallowip> 0.0.0.0 </disallowip>
<Isclosereg> false </isclosereg>
<Isclosebbs> false </isclosebbs>
<Postpay> 5 </postpay>
<Replypay> 2 </replypay>
<Goodpay> 10 </goodpay>
<Delpost> 5 </delpost>
<Delreply> 2 </delreply>
<Canclegood> 10 </canclegood>
</Drroot>

2 main methods

Public String readvalue (string key)
{< br> xmldocument XD = new xmldocument ();
XD. load (server. mappath ("model. XML ");
xmlnodelist xnl = XD. getelementsbytagname (key);
If (xnl. count = 0)
return "";
else
{< br> xmlnode mnode = xnl [0];
return mnode. innertext;
}< BR >}

Public void updatevalue (string nkey, string nvalue)
{
If (readvalue (nkey )! = "")
{
Xmldocument xmldoc = new xmldocument ();
Xmldoc. Load (server. mappath ("model. xml "));
Xmlnodelist elemlist = xmldoc. getelementsbytagname (nkey );
Xmlnode mnode = elemlist [0];
Mnode. innertext = nvalue;
Xmltextwriter XW = new xmltextwriter (New streamwriter (server. mappath ("model. xml ")));
XW. Formatting = formatting. indented;
Xmldoc. writeto (XW );
XW. Close ();
}
}