How to get an int value from a query string in ASP.NE Core

Question

I'm implementing asp.net core project and I have a line of code like following:

var myAPIApplicantId = (from x in _context.Apiapplicant
                        where x.ApiRequestNo == apiapplicantviewmodel.apiApplicantvm.ApiRequestNo
                        select new { x.Id }).First();

After running the project I understand myAPIApplicantId contains { Id = 1148 }. In another line of code, I have the following code:

int IntAPIApplicantID = Convert.ToInt32(myAPIApplicantId);

But it throws an error for type casting. Now I want to know how cant I get 1148 value to convert to int?

This is in no way a valid question. If the value of myAPIApplicantId is an interger, why convert to an int. Even if it is a string, the line of code Convert.ToInt32 must work. If it is an object, the access the Id properly with myAPIApplicantId.Id — Bosco
– Bosco, Commented Feb 22, 2020 at 13:55
Thank you. Yes your answer is ok. But you answered me a loittle bit late because I had solved my issue. — hrz
– hrz, Commented Feb 26, 2020 at 10:24

Rena · Accepted Answer · 2020-02-24 06:57:03Z

1

You could get the id like below:

var myAPIApplicantId = (from x in _context.Apiapplicant
                    where x.ApiRequestNo == apiapplicantviewmodel.apiApplicantvm.ApiRequestNo
                    select new { x.Id }).First();   //this generate an Anonymous Type like {Id=1}

int IntAPIApplicantID = myAPIApplicantId.Id;

The other way,you could change like below:

var myAPIApplicantId = _context.Apiapplicant
                               .Where(x.ApiRequestNo == apiapplicantviewmodel.apiApplicantvm.ApiRequestNo)
                               .Select(x => x.Id).First(); //this generate a Integer type

int IntAPIApplicantID = myAPIApplicantId;

answered Feb 24, 2020 at 6:57

Rena

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