无法从存储过程中获取数据

Question

I'm trying to hit the stored procedure from C# code but always get the result == -1. I don't know where I went wrong. I have searched a lot but didn't' find any solution. Please have a look into my code snippet and guide me what I'm doing wrong.

Thanks in advance.

C# code:

using (SqlConnection connection = new SqlConnection(getConnectionString()))
using (SqlCommand command = new SqlCommand())
{
    Int32 rowsAffected;

    command.CommandText = "SP_LOGIN_GETUSERBYNAME";
    command.CommandType = CommandType.StoredProcedure;
    // command.Parameters.Add(new SqlParameter("@Email", userObj.email));
    // command.Parameters.Add("@Email", SqlDbType.VarChar).Value = userObj.email.Trim();
    command.Parameters.AddWithValue("@Email", userObj.email.ToString());
    command.Connection = connection;

    connection.Open();
    rowsAffected = command.ExecuteNonQuery();
    connection.Close();

    return rowsAffected;
}

Connection string:

return "Data Source=MUNEEB-PC;Initial Catalog=HRPayRoll;User ID=sa; Password=sa";

Stored procedure code:

CREATE PROCEDURE SP_LOGIN_GETUSERBYNAME
    @Email varchar(50)
AS
    SELECT *
    FROM [User]
    WHERE Email = @Email
GO

Answer 1

From ExecuteNonQuery doc;

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. When a trigger exists on a table being inserted or updated, the return value includes the number of rows affected by both the insert or update operation and the number of rows affected by the trigger or triggers. For all other types of statements, the return value is -1

Since your command is SELECT, it is too normal to get -1 as a return value.

If you wanna reach your results, you can use ExecuteReader method instead.

var reader = command.ExecuteReader();
while (reader.Read())
{
     // This will iterate your results line by line and
     // You can get columns with zero-based values like reader[0], reader[1] or
     // can use GetXXX methods of it like GetString(0) or GetInt32(1) etc.
}