I have to correct my statement. [] also can be an indexer. But it should be used very carefully. It is much cleaner to see [] a predicate and [position()=2] for example is better choice for such indexed location. However, MSXML 3.0 does not support position() function as will be shown below.
As MSXML 3.0 uses zero-based index, MSXML 4.0 and XML standard (so-called in MSDN) uses 1-based index. .NET Framework library also conforms XML standard. As I see the wix source dutil/xmlutil.cpp (if this is the correct one), it uses MSXML 3.0 deliberately. Use of 4.0 may lead other problems, though. So, I would recommend you use a predicate like [EMAIL PROTECTED]'something2'] and avoid numerical index for your cases. Wix documentation may have to clarify that XmlUtil uses MSXML 3.0 the users should use MSXML 3.0 specification. Below show different behaviors in different versions of MSXML: ----------------------- MSXML2.DOMDocument.3.0 ----------------------- XPath=/Configuration/companyname/vals/add/@value >>> value="value1" XPath=/Configuration/companyname/vals/add[0]/@value >>> value="value1" XPath=/Configuration/companyname/vals/add[1]/@value >>> value="valueIwanttoupdate" XPath=/Configuration/companyname/vals/add[2]/@value >>> (null) XPath=/Configuration/companyname/vals/add[position()=2]/@value exception: Unknown method. /Configuration/companyname/vals/add[-->position()<--=2]/@value XPath=/Configuration/companyname/vals/[EMAIL PROTECTED]'something2']/@value >>> value="valueIwanttoupdate" ----------------------- MSXML2.DOMDocument.4.0 ----------------------- XPath=/Configuration/companyname/vals/add/@value >>> value="value1" XPath=/Configuration/companyname/vals/add[0]/@value >>> (null) XPath=/Configuration/companyname/vals/add[1]/@value >>> value="value1" XPath=/Configuration/companyname/vals/add[2]/@value >>> value="valueIwanttoupdate" XPath=/Configuration/companyname/vals/add[position()=2]/@value >>> value="valueIwanttoupdate" XPath=/Configuration/companyname/vals/[EMAIL PROTECTED]'something2']/@value >>> value="valueIwanttoupdate" ----------------------- XML in .NET Framework ----------------------- XPath=/Configuration/companyname/vals/add/@value >>> value1 XPath=/Configuration/companyname/vals/add[0]/@value >>> (null) XPath=/Configuration/companyname/vals/add[1]/@value >>> value1 XPath=/Configuration/companyname/vals/add[2]/@value >>> valueIwanttoupdate XPath=/Configuration/companyname/vals/add[position()=2]/@value >>> valueIwanttoupdate XPath=/Configuration/companyname/vals/[EMAIL PROTECTED]'something2']/@value >>> valueIwanttoupdate Chesong Lee -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chesong Lee Sent: Thursday, August 31, 2006 5:22 PM To: Scott Sam; wix-users@lists.sourceforge.net Subject: Re: [WiX-users] Using XmlFile to update an existing attribute Isn't it possible to use the xpath like this? [] in XPath is not a numerical index but node test predicate. /Configuration/companyname/vals/[EMAIL PROTECTED]'something2']/@value -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Sam Sent: Thursday, August 31, 2006 4:51 PM To: wix-users@lists.sourceforge.net Subject: [WiX-users] Using XmlFile to update an existing attribute I'm trying to set the value of an attribute to the machine name. this is a snippet of the xml file. <Configuration> . . . <companyname> <vals> <add name="something" value="value1" /> <add name="something2" value="valueIwanttoupdate" /> </vals> </companyname> </Configuration> When I use the //Configuration/Companyname[1]/vals[1]/add[2] for the ElementPath it updates value1 no matter what add I reference. Any ideas why this happens? How can I update the value attribute of the 2nd add element in the group. I don't want to create a new element, because all the elements already exist along with all of their attributes. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
