SgmlReader problem...

[Ayende Rahien]

I've a mysterious problem using SgmlReader, I get an exception doing to
following code:

I get the following exception calling CleanHtml("Pain less software
management");

"System.Argumen tNullException: Value cannot be null.
Parameter name: stream
at System.IO.Strea mReader..ctor(S tream stream, Encoding encoding, Boolean
detectEncodingF romByteOrderMar ks, Int32 bufferSize)
at System.IO.Strea mReader..ctor(S tream stream)
at Sgml.SgmlReader .LazyLoadDtd(Ur i baseUri)
at Sgml.SgmlReader .Read()
at System.Xml.XmlL oader.Load(XmlD ocument doc, XmlReader reader, Boolean
preserveWhitesp ace)
at System.Xml.XmlD ocument.Load(Xm lReader reader)
at Roar.RoarCache. CleanHtml(Strin g Html) in f:\vs.net
projects\roar\r oarcache.cs:lin e 528"




private static string CleanHtml(strin g Html)
{
Sgml.SgmlReader sr = new Sgml.SgmlReader ();
XmlDocument xdoc = new XmlDocument();
sr.DocType = "HTML";
sr.InputStream = new System.IO.Strin gReader("<p>"+H tml+"</p>");
xdoc.Load(sr);
foreach(XmlNode PotentiallyMali cous in
xdoc.SelectNode s("//@[local-name()='style'] |
//@*[starts-with(local-name(),'on')] | //*[local-name()='script' or
local-name()='object' or local-name()='embed' or local-name()='iframe' or
local-name()='meta' or local-name()='frame'o r local-name()='framese t' or
local-name()='link' or local-name()='style']"))
{
if(PotentiallyM alicous.NodeTyp e == XmlNodeType.Att ribute)
{
XmlAttribute PotentiallyMali cousAttribute = PotentiallyMali cous as
XmlAttribute;

PotentiallyMali cousAttribute.O wnerElement.Att ributes.Remove( PotentiallyMali c
ousAttribute);
}
else
//No need to check for PotentiallyMali cous.ParentNode == null because I
added the <p></p> when composing it
PotentiallyMali cous.ParentNode .RemoveChild(Po tentiallyMalico us);
}
return xdoc.InnerXml;
}

[Colin Savage]

Re: SgmlReader problem...

Without the code for SgmlReader...it 's anyone's guess what the problem is.
My guess is you are passing a null stream to this method
System.IO.Strea mReader..ctor because the uri passed to
Sgml.SgmlReader .LazyLoadDtd(Ur i baseUri) is invalid or null or cannot be
resolved

Colin

"Ayende Rahien" <Ayende@no.spam > wrote in message
news:OyCMiS8vDH A.2452@tk2msftn gp13.phx.gbl...[color=blue]
> I've a mysterious problem using SgmlReader, I get an exception doing to
> following code:
>
> I get the following exception calling CleanHtml("Pain less software
> management");
>
> "System.Argumen tNullException: Value cannot be null.
> Parameter name: stream
> at System.IO.Strea mReader..ctor(S tream stream, Encoding encoding,[/color]
Boolean[color=blue]
> detectEncodingF romByteOrderMar ks, Int32 bufferSize)
> at System.IO.Strea mReader..ctor(S tream stream)
> at Sgml.SgmlReader .LazyLoadDtd(Ur i baseUri)
> at Sgml.SgmlReader .Read()
> at System.Xml.XmlL oader.Load(XmlD ocument doc, XmlReader reader, Boolean
> preserveWhitesp ace)
> at System.Xml.XmlD ocument.Load(Xm lReader reader)
> at Roar.RoarCache. CleanHtml(Strin g Html) in f:\vs.net
> projects\roar\r oarcache.cs:lin e 528"
>
>
>
>
> private static string CleanHtml(strin g Html)
> {
> Sgml.SgmlReader sr = new Sgml.SgmlReader ();
> XmlDocument xdoc = new XmlDocument();
> sr.DocType = "HTML";
> sr.InputStream = new System.IO.Strin gReader("<p>"+H tml+"</p>");
> xdoc.Load(sr);
> foreach(XmlNode PotentiallyMali cous in
> xdoc.SelectNode s("//@[local-name()='style'] |
> //@*[starts-with(local-name(),'on')] | //*[local-name()='script' or
> local-name()='object' or local-name()='embed' or local-name()='iframe' or
> local-name()='meta' or local-name()='frame'o r local-name()='framese t' or
> local-name()='link' or local-name()='style']"))
> {
> if(PotentiallyM alicous.NodeTyp e == XmlNodeType.Att ribute)
> {
> XmlAttribute PotentiallyMali cousAttribute = PotentiallyMali cous as
> XmlAttribute;
>
>[/color]
PotentiallyMali cousAttribute.O wnerElement.Att ributes.Remove( PotentiallyMali c[color=blue]
> ousAttribute);
> }
> else
> //No need to check for PotentiallyMali cous.ParentNode == null because[/color]
I[color=blue]
> added the <p></p> when composing it
> PotentiallyMali cous.ParentNode .RemoveChild(Po tentiallyMalico us);
> }
> return xdoc.InnerXml;
> }
>
>
>[/color]

[Ayende Rahien]

Re: SgmlReader problem...

I found the problem, apperantly I compiled without embedding a resource,
which caused SgmlReader to output this message.

"Colin Savage" <sav912@hotmail .com> wrote in message
news:br9c9q$pcl $1@ctb-nnrp2.saix.net. ..[color=blue]
> Without the code for SgmlReader...it 's anyone's guess what the problem is.
> My guess is you are passing a null stream to this method
> System.IO.Strea mReader..ctor because the uri passed to
> Sgml.SgmlReader .LazyLoadDtd(Ur i baseUri) is invalid or null or cannot be
> resolved
>
> Colin
>
> "Ayende Rahien" <Ayende@no.spam > wrote in message
> news:OyCMiS8vDH A.2452@tk2msftn gp13.phx.gbl...[color=green]
> > I've a mysterious problem using SgmlReader, I get an exception doing to
> > following code:
> >
> > I get the following exception calling CleanHtml("Pain less software
> > management");
> >
> > "System.Argumen tNullException: Value cannot be null.
> > Parameter name: stream
> > at System.IO.Strea mReader..ctor(S tream stream, Encoding encoding,[/color]
> Boolean[color=green]
> > detectEncodingF romByteOrderMar ks, Int32 bufferSize)
> > at System.IO.Strea mReader..ctor(S tream stream)
> > at Sgml.SgmlReader .LazyLoadDtd(Ur i baseUri)
> > at Sgml.SgmlReader .Read()
> > at System.Xml.XmlL oader.Load(XmlD ocument doc, XmlReader reader,[/color][/color]
Boolean[color=blue][color=green]
> > preserveWhitesp ace)
> > at System.Xml.XmlD ocument.Load(Xm lReader reader)
> > at Roar.RoarCache. CleanHtml(Strin g Html) in f:\vs.net
> > projects\roar\r oarcache.cs:lin e 528"
> >
> >
> >
> >
> > private static string CleanHtml(strin g Html)
> > {
> > Sgml.SgmlReader sr = new Sgml.SgmlReader ();
> > XmlDocument xdoc = new XmlDocument();
> > sr.DocType = "HTML";
> > sr.InputStream = new System.IO.Strin gReader("<p>"+H tml+"</p>");
> > xdoc.Load(sr);
> > foreach(XmlNode PotentiallyMali cous in
> > xdoc.SelectNode s("//@[local-name()='style'] |
> > //@*[starts-with(local-name(),'on')] | //*[local-name()='script' or
> > local-name()='object' or local-name()='embed' or local-name()='iframe' or
> > local-name()='meta' or local-name()='frame'o r local-name()='framese t' or
> > local-name()='link' or local-name()='style']"))
> > {
> > if(PotentiallyM alicous.NodeTyp e == XmlNodeType.Att ribute)
> > {
> > XmlAttribute PotentiallyMali cousAttribute = PotentiallyMali cous as
> > XmlAttribute;
> >
> >[/color]
>[/color]
PotentiallyMali cousAttribute.O wnerElement.Att ributes.Remove( PotentiallyMali c[color=blue][color=green]
> > ousAttribute);
> > }
> > else
> > //No need to check for PotentiallyMali cous.ParentNode == null[/color][/color]
because[color=blue]
> I[color=green]
> > added the <p></p> when composing it
> > PotentiallyMali cous.ParentNode .RemoveChild(Po tentiallyMalico us);
> > }
> > return xdoc.InnerXml;
> > }
> >
> >
> >[/color]
>
>[/color]