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Iterate XML with XMLReader

, 19 Dec 2011 CPOL
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Ergonomic syntax to iterate through XML
**I am in process of reviewing the code as someone reported a potential bug, I have not verified this yet. I will make an update soon. Thanks for your patience -dec 19 - rj***
 
Our helper methods will create a dictionary of elements and dictionary of attributes. Therefore we simply loop through elements and attributes as so.
 
As always, with XML, there are 999 other ways to do the same thing however, this is simple syntax and a quick approach.
 
Dictionary<string, string> elements = GetElements( xmlFragment );
            foreach ( var elementKeyPair in elements )
            {
                Dictionary<string, string> attributes = GetAttributes(elementKeyPair.Key, xmlFragment);
            }
 

        public static Dictionary<string, string> GetElements(string XmlFragment)
        {
            Dictionary<string, string> dictionary = new Dictionary<string, string>();
            byte[] byteArray = Encoding.ASCII.GetBytes(XmlFragment); //todo: optimize me
            MemoryStream stream = new MemoryStream(byteArray);        //todo: optimize me
            XmlReader reader = XmlReader.Create(stream);
            try
            {
                while (reader.Read())
                {
                    if (reader.IsStartElement())
                    {
                                               KeyValuePair<string, string> pair = new KeyValuePair<string, string>(reader.Name, reader.Value);
                        if (dictionary.Contains(pair) == false)
                        {
                            dictionary.Add(reader.Name, reader.Value);
                        }
                    }
                }
            }
            catch { }
            return dictionary;
        }
        public static Dictionary<string, string> GetAttributes(string element, string XmlFragement)
        {
            Dictionary<string, string> dictionary = new Dictionary<string, string>();
            byte[] byteArray = Encoding.ASCII.GetBytes(XmlFragement); //todo: optimize me
            MemoryStream stream = new MemoryStream(byteArray);        //todo: optimize me
            XmlReader reader = XmlReader.Create(stream);
          
            while (reader.Read())
            {
                if (reader.IsStartElement())
                {
                    if ( reader.Name == element )
                    {
                        for ( int i = 0; i < reader.AttributeCount; ++i )
                        {
                            reader.MoveToNextAttribute();
                            dictionary.Add(reader.Name, reader.Value);
                        }
                    }
                }
            }
            return dictionary;
        }

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

rj45
Software Developer (Senior)
Canada Canada
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Comments and Discussions

 
GeneralReason for my vote of 1 need more explains PinmemberYeurl_200715-Dec-11 23:17 
GeneralRe: What do you want to know, I will add it. Pinmemberrj4516-Dec-11 8:38 
What do you want to know, I will add it.
GeneralReason for my vote of 2 off, nothing interesting Pinmemberalexxksys15-Dec-11 20:43 
GeneralRe: First part of a series. Pinmemberrj4516-Dec-11 8:38 
GeneralRe: sh*t PinmemberMember 774276121-Dec-11 4:08 

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