这是将数据库（.mdf文件）连接到Visual Studio项目的正确方法吗？

Question

for this i am not getting any output thought there is not any error or warning... i guess the problem is with connection string but not sure, is it?? i have created a database name RV(.mdf file) in SQL server data tool and connected it to this project in visual studio.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
using System.Configuration;

namespace student_TableConnectTry1
{



    class Program
    {


        static void Main(string[] args)
        {
            using (SqlConnection cn = new SqlConnection())
            {


                    cn.ConnectionString =@"Data Source=(local);Integrated Security=SSPI;" +"Initial Catalog=RV";

                cn.Open();



                string strSQL = "Select * From student";
                SqlCommand myCommand = new SqlCommand(strSQL, cn);
                using (SqlDataReader myDataReader = myCommand.ExecuteReader())
                {
                    // Loop over the results.
                    while (myDataReader.Read())
                    {

                        Console.WriteLine("-> usn: {0}, name: {1}.",
                        myDataReader["usn"].ToString(),
                        myDataReader["name"].ToString()
                        );
                    }
                }

                Console.ReadLine();

            }
        }
    }
}

Answer 1

You can use following connection string and try:

Integrated Security=SSPI;Persist Security Info=False;User ID=youruserid;Initial Catalog=databasename;Data Source=.\SQLEXPRESS

Also see the following link for connectionstring:

http://www.connectionstrings.com/sql-server/

I hope it will help you. :)

Let me know if it does not help you.