How to edit and delete in sql server

Question

Hi friends

I hope you are well

I have a problem is that I had a table named authorization in this structure

create table autorisation

(

Id_autorisation int primary key identity NOT NULL,

Id_user int foreign key references utilisateur (Id_user),

Id_site int foreign key references site (Id_site),

Id_profil int foreign key references profil (Id_profil)

)

In visual studio I have this interface

And in the display I two not display Id_autorization and when I want to click on the modifier 

it does not work with this request Program.cmd.CommandText = "authorization 

update 

in Id_site = (select top 1 Id_site site from the site where Libelle_site = '" + comboBox2.Text + "'),

 Id_user = (select top 1 utilisateur User_name = '"+ comboBox1. Text +"'), 

Id_profil = (select top 1 Id_profil from profil where Libelle_profile = '"+ comboBox3.Text +"') 

where Id_user = (select top 1 utilisateur User_name = @par1)"; 
Program.cmd.Parameters.AddWithValue("@par1", comboBox1.Text);
Program.cmd.ExecuteNonQuery (); 
the same problem in delete 
Program.cmd.CommandText = "delete from autorisation where 
Id_user = (select top 1 utilisateur User_name = @par1)"; 
Program.cmd.Parameters.AddWithValue("@par1", comboBox1.Text);
Program.cmd.Parameters.AddWithValue("@del", comboBox1.Text); 
Program.cmd.ExecuteNonQuery();
In short how to do the deletion and modification without writing in the clause where Id_autorisation = ....
And thanks in advance friends