Question

selectSingleNode

Asked by: jj_30

I am sure that this is very easy. It's just that I am new to XML. I have spent an hour on this already (just today) and am behind deadline.

I have an XMLNode xIn.

<Column Value="PerformerName" Out="TableX.PerName"/>

I can access the attribute value via

xIn.SelectSingleNode("/Main/Tables/Table/Columns/Column/@Value")

but not with

xIn.SelectSingleNode("@Value")

Is there a way to access it relatively and not absolutely? (absolutely: having to start from the top with Main/Tables/etc.)

Also, why does

xIn.SelectSingleNode("/Main/Tables/Table/Columns/Column[@Value=PerformerName]")

Not give me the same result?

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Asked On
2009-05-08 at 06:49:02ID24392357
Tags

XML

,

XPath

,

C#.NET

Topics

XPath

,

C# Programming Language

Participating Experts
1
Points
125
Comments
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Answers

 

by: AcumentalityPosted on 2009-05-08 at 06:56:25ID: 24336067

I'm not sure if this works...

xIn.SelectSingleNode("//@Value")

                                              
1:

Select allOpen in new window

 

by: jj_30Posted on 2009-05-08 at 07:05:06ID: 24336149

Yes, that does work,

should

xIn.SelectSingleNode("//[@Value=PerformerName]")

Also work? I also tried

xIn.SelectSingleNode("//[Value=PerformerName]")

 

by: jj_30Posted on 2009-05-08 at 07:19:37ID: 24336286

I'm trying to loop through the nodes, like this ...

So I wanted "relative" querying ... this notation that you gave me is sort of what I want, but not really.

For instance, if I do xIn.SelectSingleNode("//@KeyRelationship"), it returns TRUE, even though it's only true for the first child node.

  for (int i = 0; i < xCols.ChildNodes.Count; i++)
            {
                //loop through the columns to build the udpate statement
                if (i > 0) {
                    sColumnList += ", ";
                    sColumnsReadList += ", ";
                }
                sColumnList += XML.GetNodeValueFromNode(xCols.ChildNodes[i], "//@Out");
                sColumnList += " = " + i.ToString() + " ";
                sColumnsReadList += XML.GetNodeValueFromNode(xCols.ChildNodes[i], "//@Value");
 
                sKeyRelationship = XML.GetNodeValueFromNode(xCols.ChildNodes[i], "//@KeyRelationship");
 
            }

                                              
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Select allOpen in new window

 

by: jj_30Posted on 2009-05-08 at 07:20:36ID: 24336295

Here is part of my XML


      <Columns>
        <Column Value="ActorsName" Out="ChaName" KeyRelationship="True"/>
        <Column Value="HasMemChar" Out="MemCharacter"/>
      </Columns>
                                              
1:
2:
3:
4:
5:

Select allOpen in new window

 

by: AcumentalityPosted on 2009-05-08 at 07:23:02ID: 24336316

I think maybe //@Value=PerformerName or
//@Value='PerformerName'

 

by: AcumentalityPosted on 2009-05-08 at 07:49:43ID: 24336589

If that doesn't work, try:

xIn.SelectSingleNode("//*[@Value=PerformerName]")

                                              
1:

Select allOpen in new window

 

by: AcumentalityPosted on 2009-05-08 at 11:20:59ID: 24338796

My last answer was correct.

 

by: jj_30Posted on 2009-05-09 at 10:39:19ID: 24344882

I will try it Monday when I get back to work.

 

by: jj_30Posted on 2009-05-11 at 06:25:01ID: 31579440

//@Value='PerformerName' works fine

20120131-EE-VQP-002

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