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xml serialize dictionary

Logic-less Ladder answered on February 18, 2023 Popularity 1/10 Helpfulness 1/10

answer xml serialize dictionary

xml serialize dictionary

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Dictionary types by default cannot be serialized to XML format. The following class can be serialized and is used virtually identically to the standard dictionary class. I can't guarantee this will work for 100% of your applications but it should work for most. Ideally just use a list or something instead. If you're going to use this anyway make sure any classes you used for the dictionary value are serializable and make sure your key is of type string.

using System.Collections.Generic;
using System.Xml.Schema;
using System.Xml.Serialization;
using System.Xml;
using System;
using System.Runtime.Serialization;

namespace XMLDictionary 
{
    //by default, XML serialization cannot occur with Dictionarys. This custon code, generated by chat GBT allows this functionality 
    [Serializable]
    public class MyDictionary<TKey, TValue> : Dictionary<TKey, TValue>, IXmlSerializable
    {
        public MyDictionary()
        {
        }

        public MyDictionary(IDictionary<TKey, TValue> dictionary)
            : base(dictionary)
        {
        }

        public MyDictionary(IEqualityComparer<TKey> comparer)
            : base(comparer)
        {
        }

        public MyDictionary(int capacity)
            : base(capacity)
        {
        }

        public MyDictionary(IDictionary<TKey, TValue> dictionary, IEqualityComparer<TKey> comparer)
            : base(dictionary, comparer)
        {
        }

        public MyDictionary(int capacity, IEqualityComparer<TKey> comparer)
            : base(capacity, comparer)
        {
        }
        protected MyDictionary(SerializationInfo info, StreamingContext context)
            : base(info, context)
        {
        }
        public XmlSchema GetSchema()
        {
            return null;
        }

        public void ReadXml(XmlReader reader)
        {
            if (reader.IsEmptyElement)
            {
                reader.ReadStartElement();
                return;
            }

            reader.ReadStartElement();
            while (reader.NodeType != XmlNodeType.EndElement)
            {
                TKey key = default(TKey);
                TValue value = default(TValue);

                reader.ReadStartElement("Item");
                reader.ReadStartElement("Key");
                key = (TKey)reader.ReadContentAs(typeof(TKey), null);
                reader.ReadEndElement();
                reader.ReadStartElement("Value");
                value = (TValue)reader.ReadContentAs(typeof(TValue), null);
                reader.ReadEndElement();
                reader.ReadEndElement();

                Add(key, value);
                reader.MoveToContent();
            }
            reader.ReadEndElement();
        }

        public void WriteXml(XmlWriter writer)
        {
            var serializer = new XmlSerializer(typeof(TValue));

            foreach (KeyValuePair<TKey, TValue> pair in this)
            {
                writer.WriteStartElement("Item");
                writer.WriteStartElement("Key");
                writer.WriteValue(pair.Key);
                writer.WriteEndElement();
                writer.WriteStartElement("Value");
                serializer.Serialize(writer, pair.Value);
                writer.WriteEndElement();
                writer.WriteEndElement();
            }
            /*
             * if above code is giving problems, try this instead. 
            foreach (KeyValuePair<TKey, TValue> pair in this)
            {
                writer.WriteStartElement("Item");
                writer.WriteStartElement("Key");
                writer.WriteValue(pair.Key);
                writer.WriteEndElement();
                writer.WriteStartElement("Value");
                writer.WriteValue(pair.Value);
                writer.WriteEndElement();
                writer.WriteEndElement();
            }*/
        }
    }
}

This code was generated with the help of Chat GBT.

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Source: Grepper

Tags: dictionary whatever xml

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Contributed on Feb 18 2023

Logic-less Ladder

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xml serialize dictionary

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