In some scenarios, you might want to use the default system converter in a custom converter. ).In the following code, I'd like to use List<T>-specific functionality, such as Linq functions.. With the following check, I make sure, it's a list: The System.Text.Json namespace has built-in converters for most primitive types that map to JavaScript primitives. Unfortunately, I've found nothing helpful on the Web. How do I distinguish between chords going 'up' and chords going 'down' when writing a harmony? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. But I would suggest the inquirer to do smaller steps and not to abuse anyway. The following sections provide converter samples that address some common scenarios that built-in functionality doesn't handle. Don't tell someone to read the manual. Without proper reflection, you have to tell the function what type you'd like to return. Option for what? What are the pros and cons of allowing keywords to be abbreviated? Moreover, we named all model classes after all data table name (i.e for data table named Agent, the class name is AgentModel; for the data table product, the class name is ProductModel). I am trying to write a Generic Base Service Class where after receiving the fist generic list of data as the actual type of Db Model Entity need a conversion to a new Generic View Model type of data. Teams. This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL). You can't cast ANY to a more specific type, so you have to actually obtain the type that you want to return. Is the difference between additive groups and multiplicative groups just a matter of notation? If you throw a JsonException without a message, the serializer creates a message that includes the path to the part of the JSON that caused the error. Defining the second by an alien civilization, .htaccess return error if no RewriteRule meets the request. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. To convert an array to a List we can use the ToList () extension method in the System.Linq namespace. How to convert IList to List - social.msdn.microsoft.com All thanks to the dynamic variable. Did COVID-19 come to Italy months before the pandemic was declared? Find centralized, trusted content and collaborate around the technologies you use most. Chances are that any one-line solution is just executing a loop internally anyway. Are throat strikes much more dangerous than other acts of violence (that are legal in say MMA/UFC)? Does "discord" mean disagreement as the name of an application for online conversation? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Making statements based on opinion; back them up with references or personal experience. Here are my code snips of all classes and interfaces. For example, a discriminator property might be available or you might have to rely on the presence or absence of a particular property. It is the base interface for all non-generic collections that can be enumerated. You can call Deserialize in the Read method: A disadvantage of this method is you can't pass in the original options instance that registers the converter to Deserialize. This behavior applies to the following types and interface, and user-defined types that derive from them: To support serialization and deserialization that retains the original order in the stack, a custom converter is required. Is there a way to sync file naming across environments? If you know all of the values are of the required type in a list: If not all the values are of the type, and you want to weed out the ones that aren't: If you don't know the type until runtime, you have to use reflection. The following code shows a base class, two derived classes, and a custom converter for them. The business data layer uses reflection, generics and objects to deal with all of this. The same rule about begin token and end token applies if you are converting an array. How to convert one type of generic list to another type of generic list in C#? Also I tried System.Web.Script but Script it's not there. and what is the runtime error? convert list of objects to list of strings and generics We will learn the following things in this article: Creating Excel file using C# Writing data to cells Formatting data to cells You're trying to cast a List