How to pass multiple model as parameter in WEB API

Question

Can anyone please help me to pass multiple models as a parameter to the request's content in WEB API?

I have 2 different Model Student and Employee

public class Student
    {
        public int StudentId { get; set; }
        public string StudentName { get; set; }
        public string Branch { get; set; }
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public string EmployeeName { get; set; }
        public string Department { get; set; }
    }

I have created an API and want to pass both these models as parameters in my action method InsertTestAPI.

[HttpPost]
[Route("TestAPI")]

public HttpResponseMessage InsertTestAPI(Student modelStudent, Employee modelEmployee)
{
    // other logical operations
}

When I pass these models as JSON in the request body, I get the following error from Postman.

{
    "$id": "1",
    "Message": "An error has occurred.",
    "ExceptionMessage": "Can't bind multiple parameters ('modelStudent' and 'modelEmployee') to the request's content.",
    "ExceptionType": "System.InvalidOperationException",
    "StackTrace": "   at System.Web.Http.Controllers.HttpActionBinding.ExecuteBindingAsync(HttpActionContext actionContext, CancellationToken cancellationToken)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__15.MoveNext()"
}

Can anyone please help me?

Mehmet Ceylan · Accepted Answer · 2021-01-28 05:50:19Z

1

public class StudentEmployeModel
{
 public Student Students{get;set;}


public Employee Employees{get;set;}
}

Create the StudentEmpendedModel class this way.

public HttpResponseMessage InsertTestAPI(StudentEmployeModel model)
{// other logical operations }

request this way

    { "students":   { "studentId":"0", "studentName":"Mehmet", "branch":"software" } ,
 "employees":
 {"employeeId ":0,"employeeName":"Test","department":"IT"} }

This way you can send requests as Json

edited Jan 28, 2021 at 5:50

answered Jan 28, 2021 at 5:22

Mehmet Ceylan

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2 Comments

Nikunj Satasiya Over a year ago

Hi Mehmet, Thank you for your valuable response, can you please let me know how can I set value in the Students and Employees model while I pass StudentEmployeModel as JSON in the request body?

Mehmet Ceylan Over a year ago

I wrote the answer in the comment

Felix · Accepted Answer · 2021-01-28 05:55:53Z

1

You can call Empolyee class in student class after that .then you can call multiple model call in api

public class Student
    {
        public int StudentId { get; set; }
        public string StudentName { get; set; }
        public string Branch { get; set; }
        public Employee EmpData {get;set;}
    }

edited Jan 28, 2021 at 5:55

Felix

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answered Jan 28, 2021 at 5:20

Divyanshi Mishra

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1 Comment

Nikunj Satasiya Over a year ago

Thank you, Divyanshi for your valuable answer, your solution is also working but I can accept the answer for all so I upvoted your answer also. Thank you.

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