Solved

Testing return results in MSXML4.0

Posted on 2002-06-26
3
153 Views
Last Modified: 2010-05-02
I'm using MSXML4.0 and have a question about testing the return value of some functions.  I'm using XPath as my selection langauges so I frequently attempt to retrieve nodes using:

    Dim Node As IXMLDOMNode

    node = XMLDoc.selectSingleNode("/foo/bar")

What I would like to do is test the value of the node to ensure it is valid before calling methods on it.  The documentation for selectSingleNode says the return value is Nothing if no node is found to match the XPath expression.  I tried the following:

    If Node = Nothing Then

but I got the following error:

    Compiler Error
    Invalid Use of Object

How can I test the validity of my object in this case?
0
Comment
Question by:derekl
3 Comments
 
LVL 10

Expert Comment

by:GoodJun
ID: 7111699
may be try
If Node then
0
 
LVL 26

Accepted Solution

by:
EDDYKT earned 100 total points
ID: 7111708
Dim Node As IXMLDOMNode

set node = XMLDoc.selectSingleNode("/foo/bar")

if not node is nothing then
  ' do something
endif
0
 

Author Comment

by:derekl
ID: 7111929
Thanks.

I'm just curious why If Node doesn't work.  When I try that I get a "Object doesn't support method" error.  I'm thinking maybe a node doesn't support a conversion to boolean?
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you have ever used Microsoft Word then you know that it has a good spell checker and it may have occurred to you that the ability to check spelling might be a nice piece of functionality to add to certain applications of yours. Well the code that…
I was working on a PowerPoint add-in the other day and a client asked me "can you implement a feature which processes a chart when it's pasted into a slide from another deck?". It got me wondering how to hook into built-in ribbon events in Office.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…

929 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

9 Experts available now in Live!

Get 1:1 Help Now