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8.6

c# XmlNode:Attributes.GetNamedItem - how to check for attribute exists or not???

Asked by cosie in C# Programming Language, .NET, .NET Framework 2.x

Tags: C# .Net 2.0

I have an xml document with 100 nodes, each node has 10-15 attribues.
I iterate through the nodes and try to read all the 15 attributes and store it...
If the attribute does not exists in the node, then
xNode.Attributes.GetNamedItem(sAttributeName).Value
throws an exception....

If all attributes are found, parse time is 0ms.
If I use a try-catch for handling the non existing attributes, the parse time is 3000ms, which is terrible...
If I use an IndexOf() for the attribute name in the node's text to check wether the attribute is found or not, then the parse time is 200ms. I think this is the overhead of the IndexOf string find operations...

The question is:
How to get an attribute (even if not exists) without this overhead?
In other words how to check for the non existence of an attribute???




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public string GetSafeNodeAttribute(XmlNode xNode, string sAttributeName)
        {
            try
            {
                if (xNode.OuterXml.IndexOf(sAttributeName + "=\"") > -1)
                    return xNode.Attributes.GetNamedItem(sAttributeName).Value;
                else
                    return "";
            }
            catch (Exception ex)
            {
                //string sEx = ex.ToString();
                //Common.Trace(1,"Exception in CharmTabPage.GetSafeNodeAttribute\n" + ex.ToString());
            }
            return "";
        }
[+][-]10/22/08 01:01 PM, ID: 22780679Accepted Solution

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About this solution

Zones: C# Programming Language, .NET, .NET Framework 2.x
Tags: C# .Net 2.0
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Solution Provided By: adathelad
Participating Experts: 1
Solution Grade: A
 
 
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