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selectSingleNode

Posted on 2009-05-08
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Last Modified: 2013-11-11
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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Question by:jj_30
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9 Comments
 
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Expert Comment

by:Acumentality
ID: 24336067
I'm not sure if this works...
xIn.SelectSingleNode("//@Value")

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Author Comment

by:jj_30
ID: 24336149
Yes, that does work,

should

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

Also work? I also tried

xIn.SelectSingleNode("//[Value=PerformerName]")
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LVL 2

Author Comment

by:jj_30
ID: 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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LVL 2

Author Comment

by:jj_30
ID: 24336295
Here is part of my XML

      <Columns>
        <Column Value="ActorsName" Out="ChaName" KeyRelationship="True"/>
        <Column Value="HasMemChar" Out="MemCharacter"/>
      </Columns>

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Accepted Solution

by:
Acumentality earned 375 total points
ID: 24336316
I think maybe //@Value=PerformerName or
//@Value='PerformerName'
0
 
LVL 1

Expert Comment

by:Acumentality
ID: 24336589
If that doesn't work, try:
xIn.SelectSingleNode("//*[@Value=PerformerName]")

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Expert Comment

by:Acumentality
ID: 24338796
My last answer was correct.
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Author Comment

by:jj_30
ID: 24344882
I will try it Monday when I get back to work.
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Author Closing Comment

by:jj_30
ID: 31579440
//@Value='PerformerName' works fine
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