5. Understand Parameters in Controller

Modify the code to pass some parameter information from the URL to the controller. For example, /HelloWorld/Welcome?name=Rick&numtimes=4.

Step 1: Change the Welcome method to include two parameters as shown in the following code.

HelloWorldController.cs

// GET: /HelloWorld/Welcome/ 
// Requires using System.Text.Encodings.Web;
public string Welcome(string name, int numTimes = 1)
{
    return HtmlEncoder.Default.Encode($"Hello {name}, NumTimes is: {numTimes}");
}

Step 2: Run the app and browse to: https://localhost:5001/HelloWorld/Welcome?name=Rick&numtimes=4.

Try different values for name and numtimes in the URL. The MVC model binding system automatically maps the named parameters from the query string to parameters in the method. See Model Binding for more information.

Browser window showing an application response of Hello Rick, NumTimes is: 4