Cannot implicitly convert type 'void' to 'int'?

Question

Oke so I am fairly new to programming and I don\'t get why I get this error.

My method should store mails which it does in this method:

    public vo         


        

Answer 1

In my case I created stored procedure in the database SQL server , then i created a class in c# program and called this stored procedures and add the parameter in the stored procedures inside the class and return the data in the data table ,finally i can call my class any where in my program like this example :

1- Create Stored Procedure :

CREATE proc [dbo].[GET_SAMPLE_KIND]
@TESTID int
as 
select Dept_id,ID_sample from LabTests
where LabTests.TestId = @TESTID 

2- Create class in your C# program and call the stored procedure with parameters like this code :

public DataTable GET_SAMPLE_KIND(int TESTID)
        {
            DAL.DataAccessLayer DAL = new DAL.DataAccessLayer();
            DataTable dt = new DataTable();

            SqlParameter[] param = new SqlParameter[1];
            param[0] = new SqlParameter("@TESTID", SqlDbType.Int);
            param[0].Value = TESTID;

            dt = DAL.SelectData("GET_SAMPLE_KIND", param);
            DAL.close();
            return dt;
        }

To connect and read from database you must make another class to contact sql server which is in my case DAL.selectData method to select data from database , also for insert and update and delete statements you can create stored procedures then create another void in your class for that functions.

3- Finally you can call your class and stored procedures from your program.