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Deserialization XMl Error


Deserialization XMl Error

By : James Vixon
Date : November 22 2020, 11:12 AM
may help you . The serialization of a list doesn't face problems. Creation of the XML File: , You forgot to specify root attribute while de-serializing:
code :
XmlSerializer deserializer = new XmlSerializer(typeof(List<Tool>) , new XmlRootAttribute("Tools"));


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java - invoking standard deserialization inside custom deserialization

java - invoking standard deserialization inside custom deserialization


By : user2334223
Date : March 29 2020, 07:55 AM
With these it helps Yes - in.defaultReadObject().
But you'd have to use readObject(..) not readExternal(..)
C# JSON deserialization: can I intercept the deserialization and optionally change the result?

C# JSON deserialization: can I intercept the deserialization and optionally change the result?


By : vodafone
Date : March 29 2020, 07:55 AM
I wish this help you Writing a custom JsonConverter for a primitive type is pretty straghtforward:
code :
using System;
using Newtonsoft.Json;

namespace So16972364JsonDeserializeConverter
{
    class BoolConverter : JsonConverter
    {
        public override void WriteJson (JsonWriter writer, object value, JsonSerializer serializer)
        {
            serializer.Serialize(writer, value);
        }

        public override object ReadJson (JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            switch (reader.TokenType) {
                case JsonToken.String:
                    if ((string)reader.Value == "")
                        return false;
                    break;
                case JsonToken.Boolean:
                    return reader.Value;
            }
            throw new JsonReaderException("Expected boolean or empty string.");
        }

        public override bool CanConvert (Type objectType)
        {
            return objectType == typeof(bool);
        }
    }

    class Program
    {
        const string json = @"
{
    b1: true,
    b2: false,
    b3: ''
}
";

        static void Main ()
        {
            Foo foo = JsonConvert.DeserializeObject<Foo>(json, new JsonSerializerSettings {
                Converters = { new BoolConverter() }
            });
            Console.WriteLine(JsonConvert.SerializeObject(foo, Formatting.Indented));
            Console.ReadKey();
        }
    }

    class Foo
    {
        public bool b1, b2, b3;
    }
}
JSON Deserialization Type is not supported for deserialization of an array

JSON Deserialization Type is not supported for deserialization of an array


By : JingMing Dai
Date : March 29 2020, 07:55 AM
help you fix your problem The problem is that you're telling the serializer that it's just a single Workout, not a list/array of them. This works:
code :
var blah = s.Deserialize<List<Workout>>(jstr);
Using Custom WCF Body Deserialization without changing URI Template Deserialization

Using Custom WCF Body Deserialization without changing URI Template Deserialization


By : Rodrigo
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Well, this is maybe the most ridiculous thing I've had to do, but copying the source code for UriTemplateDispatchFormatter, you can simply return a UriTemplateDispatchFormatter with an "inner" IDispatchFormatter that corresponds to the IDispatchFormatter I provided here. Not sure why this class was made internal >_>
the following class definition:
code :
class UriTemplateDispatchFormatter : IDispatchMessageFormatter
{
    internal Dictionary<int, string> pathMapping;
    internal Dictionary<int, KeyValuePair<string, Type>> queryMapping;
    Uri baseAddress;
    IDispatchMessageFormatter bodyFormatter;
    string operationName;
    QueryStringConverter qsc;
    int totalNumUTVars;
    UriTemplate uriTemplate;

    public UriTemplateDispatchFormatter(OperationDescription operationDescription, IDispatchMessageFormatter bodyFormatter, QueryStringConverter qsc, string contractName, Uri baseAddress)
    {
        this.bodyFormatter = bodyFormatter;
        this.qsc = qsc;
        this.baseAddress = baseAddress;
        this.operationName = operationDescription.Name;
        Populate(
            out this.pathMapping,
            out this.queryMapping,
            out this.totalNumUTVars,
            out this.uriTemplate,
            operationDescription,
            qsc,
            contractName);
    }

    public void DeserializeRequest(Message message, object[] parameters)
    {
        object[] bodyParameters = new object[parameters.Length - this.totalNumUTVars];

        if (bodyParameters.Length != 0)
        {
            this.bodyFormatter.DeserializeRequest(message, bodyParameters);
        }
        int j = 0;
        UriTemplateMatch utmr = null;
        string UTMRName = "UriTemplateMatchResults";
        if (message.Properties.ContainsKey(UTMRName))
        {
            utmr = message.Properties[UTMRName] as UriTemplateMatch;
        }
        else
        {
            if (message.Headers.To != null && message.Headers.To.IsAbsoluteUri)
            {
                utmr = this.uriTemplate.Match(this.baseAddress, message.Headers.To);
            }
        }
        NameValueCollection nvc = (utmr == null) ? new NameValueCollection() : utmr.BoundVariables;
        for (int i = 0; i < parameters.Length; ++i)
        {
            if (this.pathMapping.ContainsKey(i) && utmr != null)
            {
                parameters[i] = nvc[this.pathMapping[i]];
            }
            else if (this.queryMapping.ContainsKey(i) && utmr != null)
            {
                string queryVal = nvc[this.queryMapping[i].Key];
                parameters[i] = this.qsc.ConvertStringToValue(queryVal, this.queryMapping[i].Value);
            }
            else
            {
                parameters[i] = bodyParameters[j];
                ++j;
            }
        }
    }


    public Message SerializeReply(MessageVersion messageVersion, object[] parameters, object result)
    {
        throw new NotImplementedException();
    }

    private static void Populate(out Dictionary<int, string> pathMapping,
    out Dictionary<int, KeyValuePair<string, Type>> queryMapping,
    out int totalNumUTVars,
    out UriTemplate uriTemplate,
    OperationDescription operationDescription,
    QueryStringConverter qsc,
    string contractName)
    {
        pathMapping = new Dictionary<int, string>();
        queryMapping = new Dictionary<int, KeyValuePair<string, Type>>();
        string utString = GetUTStringOrDefault(operationDescription);
        uriTemplate = new UriTemplate(utString);
        List<string> neededPathVars = new List<string>(uriTemplate.PathSegmentVariableNames);
        List<string> neededQueryVars = new List<string>(uriTemplate.QueryValueVariableNames);
        Dictionary<string, byte> alreadyGotVars = new Dictionary<string, byte>(StringComparer.OrdinalIgnoreCase);
        totalNumUTVars = neededPathVars.Count + neededQueryVars.Count;
        for (int i = 0; i < operationDescription.Messages[0].Body.Parts.Count; ++i)
        {
            MessagePartDescription mpd = operationDescription.Messages[0].Body.Parts[i];
            string parameterName = XmlConvert.DecodeName(mpd.Name);
            if (alreadyGotVars.ContainsKey(parameterName))
            {
                throw new InvalidOperationException();
            }
            List<string> neededPathCopy = new List<string>(neededPathVars);
            foreach (string pathVar in neededPathCopy)
            {
                if (string.Compare(parameterName, pathVar, StringComparison.OrdinalIgnoreCase) == 0)
                {
                    if (mpd.Type != typeof(string))
                    {
                        throw new InvalidOperationException();
                    }
                    pathMapping.Add(i, parameterName);
                    alreadyGotVars.Add(parameterName, 0);
                    neededPathVars.Remove(pathVar);
                }
            }
            List<string> neededQueryCopy = new List<string>(neededQueryVars);
            foreach (string queryVar in neededQueryCopy)
            {
                if (string.Compare(parameterName, queryVar, StringComparison.OrdinalIgnoreCase) == 0)
                {
                    if (!qsc.CanConvert(mpd.Type))
                    {
                        throw new InvalidOperationException();
                    }
                    queryMapping.Add(i, new KeyValuePair<string, Type>(parameterName, mpd.Type));
                    alreadyGotVars.Add(parameterName, 0);
                    neededQueryVars.Remove(queryVar);
                }
            }
        }
        if (neededPathVars.Count != 0)
        {
            throw new InvalidOperationException();
        }
        if (neededQueryVars.Count != 0)
        {
            throw new InvalidOperationException();
        }
    }
    private static string GetUTStringOrDefault(OperationDescription operationDescription)
    {
        string utString = GetWebUriTemplate(operationDescription);
        if (utString == null && GetWebMethod(operationDescription) == "GET")
        {
            utString = MakeDefaultGetUTString(operationDescription);
        }
        if (utString == null)
        {
            utString = operationDescription.Name;
        }
        return utString;
    }
    private static string MakeDefaultGetUTString(OperationDescription od)
    {
        StringBuilder sb = new StringBuilder(XmlConvert.DecodeName(od.Name));
        //sb.Append("/*"); // note: not + "/*", see 8988 and 9653
        if (!IsUntypedMessage(od.Messages[0]))
        {
            sb.Append("?");
            foreach (MessagePartDescription mpd in od.Messages[0].Body.Parts)
            {
                string parameterName = XmlConvert.DecodeName(mpd.Name);
                sb.Append(parameterName);
                sb.Append("={");
                sb.Append(parameterName);
                sb.Append("}&");
            }
            sb.Remove(sb.Length - 1, 1);
        }
        return sb.ToString();
    }
    private static bool IsUntypedMessage(MessageDescription message)
    {

        if (message == null)
        {
            return false;
        }
        return (message.Body.ReturnValue != null && message.Body.Parts.Count == 0 && message.Body.ReturnValue.Type == typeof(Message)) ||
            (message.Body.ReturnValue == null && message.Body.Parts.Count == 1 && message.Body.Parts[0].Type == typeof(Message));
    }
    private static void EnsureOk(WebGetAttribute wga, WebInvokeAttribute wia, OperationDescription od)
    {
        if (wga != null && wia != null)
        {
            throw new InvalidOperationException();
        }
    }
    private static string GetWebUriTemplate(OperationDescription od)
    {
        // return exactly what is on the attribute
        WebGetAttribute wga = od.Behaviors.Find<WebGetAttribute>();
        WebInvokeAttribute wia = od.Behaviors.Find<WebInvokeAttribute>();
        EnsureOk(wga, wia, od);
        if (wga != null)
        {
            return wga.UriTemplate;
        }
        else if (wia != null)
        {
            return wia.UriTemplate;
        }
        else
        {
            return null;
        }
    }
    private static string GetWebMethod(OperationDescription od)
    {
        WebGetAttribute wga = od.Behaviors.Find<WebGetAttribute>();
        WebInvokeAttribute wia = od.Behaviors.Find<WebInvokeAttribute>();
        EnsureOk(wga, wia, od);
        if (wga != null)
        {
            return "GET";
        }
        else if (wia != null)
        {
            return wia.Method ?? "POST";
        }
        else
        {
            return "POST";
        }
    }

}
class NewtonsoftJsonBehavior : WebHttpBehavior
{
    protected override IDispatchMessageFormatter GetRequestDispatchFormatter(OperationDescription operationDescription, ServiceEndpoint endpoint)
    {
        return new UriTemplateDispatchFormatter(
            operationDescription,
            new NewtonsoftJsonDispatchFormatter(operationDescription, endpoint, true),
            GetQueryStringConverter(operationDescription),
            endpoint.Contract.Name,
            endpoint.Address.Uri);
    }

    protected override IDispatchMessageFormatter GetReplyDispatchFormatter(OperationDescription od, ServiceEndpoint ep)
    {
        return new NewtonsoftJsonDispatchFormatter(od, ep, false);
    }

}
newtonsoft json deserialization error handling: partial deserialization

newtonsoft json deserialization error handling: partial deserialization


By : R.Chakraborty
Date : March 29 2020, 07:55 AM
will be helpful for those in need You can do it with JsonReader.
Example code:
code :
var result = new Dictionary<string, object>();

using (var reader = new JsonTextReader(new StringReader(yourJsonString)))
{
    var lastProp = string.Empty;
    try
    {
        while (reader.Read())
        {
            if (reader.TokenType == JsonToken.PropertyName)
            {
                lastProp = reader.Value.ToString();
            }

            if (reader.TokenType == JsonToken.Integer || 
                reader.TokenType == JsonToken.String)
            {
                result.Add(lastProp, reader.Value);
            }
        }
    }

    catch(JsonReaderException jre)
    {
        //do anything what you want with exception
    }
}
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