How to Pass Multiple Parameters to a Get Method in C#

1. Pass Multiple Parameters to a Get Method Using Controller Action in C#
2. Code Snippet to Pass Multiple Parameters to a Get Method Using Attribute Routing
3. Code Snippet to Pass Multiple Parameters to a Get Method Using [FromQuery]

ASP.NET MVC is used to develop web applications. MVC Web API and Web pages framework is now merged into one framework named MVC 6. MVC is a pattern that allows you to interact with the model, view, and controller via requests that are routed.

In this article, we are doing to discuss various methods that are used to pass multiple parameters to a Get method in an MVC controller.

Pass Multiple Parameters to a Get Method Using Controller Action in C#

A controller action is a method that is used to handle incoming requests. And it returns the action result. The action result is the response to the incoming requests. In this case, we have used controller action to pass multiple parameters to a Get method.

Example Code:

public string Get(int? id, string FirstName, string LastName, string Address) {
  if (id.HasValue)
    GetById(id);
  else if (string.IsNullOrEmpty(Address))
    GetByName(FirstName, LastName);
  else
    GetByNameAddress(FirstName, LastName, Address);
}

Code Snippet to Pass Multiple Parameters to a Get Method Using Attribute Routing

In attribute routing, we use attributes to define routes. It is a recommended method because it reduces the chances of error. It gives you more control over URLs in your Web API.

The correct syntax to use this method is as follows:

// Specify route
[Route("api/YOURCONTROLLER/{parameterOne}/{parameterTwo}")]
public string Get(int parameterOne, int parameterTwo) {
  return $"{parameterOne}:{parameterTwo}";
}
}

Example Code:

// Specify route
[Route("api/yourControllerName/{FirstName}/{LastName}/{Address}")]
public string Get(string id, string FirstName, string LastName, string Address) {
  return $"{FirstName}:{LastName}:{Address}";
}

Code Snippet to Pass Multiple Parameters to a Get Method Using [FromQuery]

[FromQuery]is used to specify that a parameter should be bound with the request query string. It is the property of the FromQueryAttribute class.

The correct syntax to use this property is as follows:

[HttpGet]
public string GetByAttribute([FromQuery] string parameterOne, [FromQuery] string parameterTwo) {}

Example Code:

[Route("api/person")]
public class PersonController : Controller {
  [HttpGet]
  // Passing one parameter to the Get method
  public string GetById([FromQuery] int id) {}

  [HttpGet]
  // Passing two parameters to the Get method
  public string GetByName([FromQuery] string firstName, [FromQuery] string lastName) {}

  [HttpGet]
  // Passing multiple parameters to the Get method
  public string GetByNameAndAddress([FromQuery] string firstName, [FromQuery] string lastName,
                                    [FromQuery] string address) {}
}