How to convert json in to class object in C#

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An exception of type 'System.InvalidCastException' occurred in RetrieveData.dll but was not handled in user code

Additional information: Unable to cast object of type 'System.Collections.Generic.Dictionary`2[System.String,System.Object]' to type 'RetrieveData.Models.FlightDetails'.

What I have tried:

try to Convert json Data to Class Object Flight Details above i Post the Error Please help-

XmlDocument doc = new XmlDocument();
doc.LoadXml(dep);
string jsonText = JsonConvert.SerializeXmlNode(doc);

// DataTable tester = (DataTable)JsonConvert.DeserializeObject(jsonText, (typeof(DataTable)));
var table = JsonConvert.DeserializeAnonymousType(jsonText, new { Makes = default(DataTable) }).Makes;
JavaScriptSerializer json_serializer = new JavaScriptSerializer();
FlightDetails routes_list = (FlightDetails)json_serializer.DeserializeObject(jsonText);

Posted 30-Nov-18 1:30am

Member 12183079

Updated 30-Nov-18 15:26pm

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F-ES Sitecore 30-Nov-18 7:50am

Without knowing what you are trying to convert, and what you are trying to convert it to it's impossible to give specific advice. Google "c# deserialise json" for things that might help.

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OriginalGriff · Answer 1 · 2018-11-30T01:41:00

Start by looking at what the json contains. This may help: json2csharp - generate c# classes from json[^] - it generates C# clases from a JSON string that you can then use (or compare with) the classes in your app.

Me? I use Newtonsoft, where creating the instances and filling them is simple:

C#

MyClass mc = Newtonsoft.Json.JsonConvert.DeserializeObject<MyClass>(jsonString);

where MyClass can be anything: List<T>, a single class instance, whatever you JSON contains.

Graeme_Grant · Answer 2 · 2018-11-30T15:27:00

Solution 2

I have an article that I put together based on questions here. It covers all that you need: Working with JSON in C# & VB[^]

Posted 30-Nov-18 15:27pm

Graeme_Grant