The C# language has many powerful features, including the ability to create and manipulate dynamic objects. This post will explain the concept of dynamic objects in C#, provide code samples to demonstrate their use, and discuss the benefits of dynamic objects.
What are Dynamic Objects in C#?
Dynamic objects in C# are objects that allow users to modify their properties and methods at runtime. They have no predefined structure, meaning that their members and methods can be added and removed as needed. This flexibility makes them ideal for scenarios where the structure of the object can change depending on the environment or user input.
Benefits of Using Dynamic Objects in C#
Dynamic objects in C# offer a number of advantages over standard objects. They can be used to quickly prototype an application without having to set up a complex object structure. Additionally, they can be more efficient when dealing with large amounts of data as they don’t need to be initialized at the start. Finally, dynamic objects can also be used to access and manipulate data from other sources, such as databases or web services.
Code Samples
The following code samples demonstrate the use of dynamic objects in C#. The first example shows how to create a dynamic object and add a property to it:
dynamic myObj = new ExpandoObject();
myObj.Name = "John";
The second example shows how to access the properties of a dynamic object:
dynamic myObj = new ExpandoObject();
myObj.Name = "John";
string name = myObj.Name; // name = "John"
Finally, the third example shows how to invoke a method of a dynamic object:
dynamic myObj = new ExpandoObject();
myObj.SayHello = (string name) => {
Console.WriteLine($"Hello, {name}!");
};
myObj.SayHello("John"); // Prints "Hello, John!"
Conclusion
Dynamic objects in C# provide an effective way to quickly prototype applications and access data from other sources. They also offer a number of benefits over standard objects, such as increased efficiency and flexibility. By using the code samples provided in this post, users can begin to take advantage of dynamic objects in their own projects.
In the past post, we discussed the Web Improvements that have been released in the ASP.NET Core 2.2 preview.
We have discussed how the creation, testing, and documentation of API has been improved in the ASP.NET Core release.
Using Swagger gen, we created API documentation and also able to test our API application from the UI itself.
On successful HTTP action, we usually get 200 status code and response from the API.
ASP.NET Core provides custom error response by default from 2.2 release. The error response includes TraceId to correlate to other response easily,
In the earlier post, we use SwashBuckle to generate swagger UI, but it isn’t able to determine all the possible response type of an HTTP method. For example, a post method can return 200, 400, 500 kinds of responses based on different input.
Our documentation should cover most of the possible response type available in our API.
We shall specify the possible response type of each method in our Controller which will generate related documentation in the Swagger UI. But it will be a tedious process to analyze and add all the methods in our API.
For this, ASP.NET Core 2.2 shipped an API Analyzer that will analyze the API actions and provide code fix that can be added in the code.
We shall the package “Microsoft.AspNetCore.Mvc.Api.Analyzers” from Nuget Package manager
Once added API analyzer in our project, the analyzer starts showing the possible response type suggestion in warning window.
Instead of providing mentioning each response type on every action, we shall globally enable the API convention type with default conventions like below
These DefaultApiConventions can also be extended and defined separately based on our needs.
DefaultApiConventions covers some basic commonly used convention types in APIs.
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Based API conventions, now the swagger UI generates documentation of various response types and its sample inputs.
Documentation and testing become simpler in ASP.Net Core 2.2.
Please try out for your API code, and leave your feedback in comment section.
Happy Coding!
Efficient User 