Type Is Not Supported For Deserialization Of An Array Javascriptserializer
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How to Fix the Error "Type Is Not Supported For Deserialization Of An Array Javascriptserializer"
If you are using the JavaScriptSerializer class in C# to deserialize a JSON string that represents an array or a list of objects, you may encounter the error "Type Is Not Supported For Deserialization Of An Array Javascriptserializer". This error means that the type you are trying to deserialize to does not match the structure of the JSON string. In this article, we will show you how to fix this error by using the correct type for deserialization.
Example of the Error
Let's say you have a JSON string that looks like this:
[
"Number": 123,
"Name": "ABC",
"ID": 123,
"Address": "ABC"
,
"Number": 456,
"Name": "DEF",
"ID": 456,
"Address": "DEF"
]
This JSON string represents an array of objects, each with four properties: Number, Name, ID, and Address. Now, let's say you have a class called Profiles that has these four properties:
[Serializable]
public class Profiles
public int Number get; set;
public string Name get; set;
public int ID get; set;
public string Address get; set;
You may think that you can deserialize the JSON string to an instance of Profiles using the JavaScriptSerializer class like this:
JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
Profiles thingy = jsonSerializer.Deserialize(fileContents);
However, this will throw the error "Type Is Not Supported For Deserialization Of An Array Javascriptserializer". Why Because the JSON string is not a single object, but an array of objects. Therefore, you cannot deserialize it to a single instance of Profiles, but to a collection of Profiles.
How to Fix the Error
To fix the error, you need to use a collection type that matches the structure of the JSON string. For example, you can use a List, an array of Profiles, or any other type that implements IEnumerable. Here is an example of using a List:
JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
List thingy = jsonSerializer.Deserialize(fileContents);
This will successfully deserialize the JSON string to a list of Profiles objects. You can then access each element of the list using an index or a loop. For example:
Console.WriteLine(thingy[0].Name); // ABC
Console.WriteLine(thingy[1].Address); // DEF
foreach (var profile in thingy)
Console.WriteLine(profile.Number);
Conclusion
In this article, we learned how to fix the error "Type Is Not Supported For Deserialization Of An Array Javascriptserializer" by using the correct type for deserialization. We saw that we need to use a collection type that matches the structure of the JSON string, such as a List, an array of Profiles, or any other type that implements IEnumerable. We hope this article was helpful and informative for you. a474f39169