使用JavaScriptSerializer和自定义JavaScriptConverter序列化和反序列化Dictionary <int,object>

Question

您如何使用JavaScriptSerializer和自定义JavaScriptConverter序列化和反序列化其键为JSON 整数的字典？

对于那些不知道的人,JavaScripSerializer无法开箱即用.

请注意,我对需要在序列化之前转换字典或使用其他序列化程序的解决方案感兴趣(如果有的话,您可能会看到此帖子).

更新:为了消除任何歧义,我没有问题,密钥是作为JSON中的字符串生成的(因此1将变为"1").

Answer 1

/// <summary>
/// Implements JavaScript Serialization and Deserialization for instances of the Dictionary&lt;int, object&gt; type.
/// </summary>
public class IntDictionaryConverter : JavaScriptConverter
{
    /// <summary>
    /// Converts the provided dictionary into a Dictionary&lt;int, object&gt; object.
    /// </summary>
    /// <param name="dictionary">An IDictionary instance of property data stored as name/value pairs.</param>
    /// <param name="type">The type of the resulting object.</param>
    /// <param name="serializer">The JavaScriptSerializer instance.</param>
    /// <returns>The deserialized object.</returns>
    public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
    {
        // Validate arguments
        if (dictionary == null) throw new ArgumentNullException("dictionary");
        if (serializer == null) throw new ArgumentNullException("serializer");

        Dictionary<int, object> deserializedDictionary = new Dictionary<int, object>();
        foreach (KeyValuePair<string, object> entry in dictionary)
        {
            int intKey = 0;
            if (!int.TryParse(entry.Key, out intKey))
                throw new InvalidOperationException("Cannot deserialize the dictionary because of invalid number string");

            deserializedDictionary.Add(intKey, entry.Value);
        }

        return deserializedDictionary;
    }

    /// <summary>
    /// Builds a dictionary of name/value pairs.
    /// </summary>
    /// <param name="obj">The object to serialize.</param>
    /// <param name="serializer">The object that is responsible for the serialization.</param>
    /// <returns>An object that contains key/value pairs that represent the object’s data.</returns>
    public override IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
    {
        // Validate arguments
        if (obj == null) throw new ArgumentNullException("obj");
        if (serializer == null) throw new ArgumentNullException("serializer");

        // Get the dictionary to convert
        Dictionary<int, object> dictionary = (Dictionary<int, object>)obj;

        // Build the converted dictionary
        Dictionary<string, object> convertedDictionary = new Dictionary<string, object>();

        foreach (KeyValuePair<int, object> entry in dictionary)
            convertedDictionary.Add(entry.Key.ToString(), entry.Value);

        return convertedDictionary;
    }

    /// <summary>
    /// Gets a collection of the supported types.
    /// </summary>
    public override System.Collections.Generic.IEnumerable<Type> SupportedTypes
    {
        get
        {
            return new Type[]
            {
                typeof(Dictionary<int, object>)
            };
        }
    }
}