ASP & XML runtime error '800a01a8' 1

[jammer1221]

Hi All,

I am receiving the error "Microsoft JScript runtime error '800a01a8'" inside of this script.

Error Message:

Microsoft JScript runtime error '800a01a8' 

Object required 

/aspxml.asp, line 16

Script:

<%@ Language=JScript%>
<%Server.ScriptTimeout=21478836%>
<%Response.Buffer=false%>

<%
var objXMLDoc = Server.CreateObject("MSXML2.DOMDocument");
objXMLDoc.async = false;
objXMLDoc.load(Server.MapPath("/menu/menu.xml"));
var xmlQuery = "//node[@data='/curriculumdevelopment/elementary/open-wide.html']";


var docHeadlines = objXMLDoc.documentElement.selectSingleNode(xmlQuery);

while (typeof(docHeadlines.parentNode)=="object") {

for (x=0;x<docHeadlines.attributes.length;x++) {//line 16
if (docHeadlines.attributes(x).name=="label") {
if (docHeadlines.attributes(x).value!="") Response.Write(docHeadlines.attributes(x).value+" > ");
docHeadlines=docHeadlines.parentNode;
break;
}
}
}


%>

There is output. The error comes after the expected output. Any advice as to what causes this error and how to fix it would be greatly appreciated!

Let me know if you need any more info.

Thanks,
Matt

 

[Sheco]

Maybe [tt]docHeadlines[/tt] is getting set to Nothing/Null/Undefined when the following line executes:
[tt]docHeadlines=docHeadlines.parentNode;[/tt]

So then when it loops back to check if it is done with the iterations... the value of [tt]docHeadlines[/tt] is bogus.

 

[jammer1221]

Hi Sheco,

I'm a PHP guy and this is my best attempt at ASP. But, I was under the impression that the while loop would not continue if docHeadlines was not an object. So is it possible in ASP for docHeadlines to be eqaul to Nothing/null/undefined and still be an object? Would you advise that I change the while loop? If so, to what?

Also, I changed the while loop a little.

From this:

while (typeof(docHeadlines.parentNode)=="object") {

To this:

while (typeof(docHeadlines)=="object") {

Thanks for the help!

Matt

 

[Sheco]

Yes the outer while loop is designed to terminate when docHeadlines is no longer an object but the inner for loop is also dependant on docHeadlines being an object. The inner loop runs as long as [tt]x[/tt] is less than [tt]docHeadlines.attributes.length[/tt].

 

[tsuji]

[tt]while (typeof(docHeadlines.parentNode)=="object") {

for (x=0;x<docHeadlines.attributes.length;x++) {//line 16
if (docHeadlines.attributes(x).name=="label") {
if (docHeadlines.attributes(x).value!="") Response.Write(docHeadlines.attributes(x).value+" > ");
break;
}
}
docHeadlines=docHeadlines.parentNode;
}
[/tt]

 

[jammer1221]

Hey guys,

Thank you all for the help. I did finally solve it. I'll post what I did incase someone else stumbles on this thread. I added this code under the while loop.

if (docHeadlines.attributes==null) break;

Thanks,
Matt

 

[tsuji]

While you think you do it correct, you better follow what I propose (or any variation of it). [1] If is how you move the node up the tree. If you think the script arrives at a stage docHeadlines.attributes==null, your docHeadlines is already in the void (not it - as an domdocment or domelement object - has .attributes collection null, mind you!) and it should have already been filtered out in the while-statement. [2] If no node has the name "label", do you not notice that you are in an infinite loop?! At the end, it is up to you.