C# restore database and create user

using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace RestoreDatabase
...{
    public class IniFile
    ...{
        private string bakFileName = string.Empty;
        private string bakfileNmNotExtension = string.Empty;
        public string Path;
        /**/////声明读写INI文件的API函数 
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

        //类的构造函数，传递INI文件名
        public IniFile(string inipath)
        ...{
            Path = inipath;
        }

        //写INI文件
        public void IniWriteValue(string Section, string Key, string Value)
        ...{
            WritePrivateProfileString(Section, Key, Value, this.Path);
        }

        //读取INI文件指定
        public string IniReadValue(string Section, string Key)
        ...{
            StringBuilder temp = new StringBuilder(255);
            int i = GetPrivateProfileString(Section, Key, "", temp, 255, this.Path);
            return temp.ToString();
        }
        public string bakFileNm
        ...{
            get ...{ return this.bakFileName; }
            set ...{ this.bakFileName = value; }
        }
        public string bakFileNmNotExn
        ...{
            get ...{ return this.bakfileNmNotExtension; }
            set ...{ this.bakfileNmNotExtension = value; }
        }
        public Boolean JudgementNotExist(string sql, string tableNm,ref SqlConnection conn, ref DataSet ds, ref SqlDataAdapter da)
        ...{
            try
            ...{
                ds.Tables.Clear();
                da.SelectCommand = new SqlCommand(sql,conn);
                da.Fill(ds, tableNm);
                if (ds.Tables[0].Rows.Count == 0)
                    return true;
                else
                    return false;
            }
            catch (Exception e)
            ...{ throw e; }
        }
    }
}

 Program.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Reflection;
using System.IO;

namespace RestoreDatabase
...{
    class Program
    ...{
        public static void Main(string[] args)
        ...{
            string ServerName, MSSQLDB, UsrId, UsrPwd, InifilePath, SysPath, ExistDBsql, restoreSql, CreateDBSql;
            string CreateLogin, CreateUser, CreateAlter, AddRole, ExistLogins,ExistUser;

            try
            ...{
                //get database info from 'database.ini' file
                InifilePath = Environment.CurrentDirectory + "/Setup/Database/databaseInfo.ini";
                IniFile ini = new IniFile(InifilePath);
                //ServerName = ini.IniReadValue("Database", "ServerName");
                MSSQLDB = ini.IniReadValue("Database", "MSSQLDB");
                UsrId = ini.IniReadValue("Database", "USRID");
                UsrPwd = ini.IniReadValue("Database", "USRPWD");
                //get '.bak' file from currentDirectory
                DirectoryInfo dir = new DirectoryInfo(Environment.CurrentDirectory + "/Setup/Database/");
                foreach (FileInfo fileinfo in dir.GetFiles("*.bak"))
                ...{
                    if (fileinfo.Extension == ".bak")
                    ...{
                        ini.bakFileNm = fileinfo.Name;
                        ini.bakFileNmNotExn = fileinfo.Name.Replace(fileinfo.Extension, "").Trim();
                    }
                }
                SysPath = Environment.CurrentDirectory + "/Setup/Database/" + ini.bakFileNm;
                ExistDBsql = "SELECT 1 FROM master..sysdatabases  WHERE name='" + ini.bakFileNmNotExn + "'";
                restoreSql = "RESTORE DATABASE " + MSSQLDB + " FROM DISK='" + SysPath + "' WITH REPLACE";
                CreateDBSql = "CREATE DATABASE " + MSSQLDB + " ";
                CreateLogin = "EXEC master.dbo.sp_addlogin @loginame = N'" + UsrId + "', @passwd = N'" + UsrPwd + "'";
                //CreateLogin = "CREATE LOGIN [" + UsrId + "] WITH PASSWORD=N'" + UsrPwd + "', DEFAULT_DATABASE=[master], " +
                //                    "DEFAULT_LANGUAGE= [us_english], CHECK_EXPIRATION=ON, CHECK_POLICY=ON ";
                CreateUser = "CREATE USER [" + UsrId + "] FOR LOGIN [" + UsrId + "] ";
                CreateAlter = "ALTER USER [" + UsrId + "] WITH DEFAULT_SCHEMA=[dbo] ";
                AddRole = "EXEC sp_addrolemember N'db_owner', N'" + UsrId + "' ";
                ExistLogins = "SELECT 1 FROM master..syslogins where name='" + UsrId + "'";
                ExistUser="select * from  sysusers where name='" + UsrId + "'";

                SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=as;");
                SqlCommand comm = new SqlCommand();
                comm.Connection = conn;
                conn.Open();
                DataSet ds = new DataSet();
                SqlDataAdapter da = new SqlDataAdapter(ExistDBsql, conn);
                if (ini.JudgementNotExist(ExistDBsql, "sysdatabases", ref conn, ref ds, ref da))
                ...{
                    Console.WriteLine("Creating Database...");
                    comm.CommandText = CreateDBSql;
                    comm.ExecuteNonQuery();
                    Console.WriteLine("Create Database Complete.");
                }
                Console.WriteLine("Restoring Database...");
                comm.CommandText = restoreSql;
                comm.ExecuteNonQuery();
                Console.WriteLine("Restore Database Complete.");

                Console.WriteLine("Creating Database User ...");
                comm.Connection.ChangeDatabase("master");
                if (ini.JudgementNotExist(ExistLogins, "sysdatabases", ref conn, ref ds, ref da))
                ...{
                    comm.CommandText = CreateLogin;
                    comm.ExecuteNonQuery();
                }
                comm.Connection.ChangeDatabase(ini.bakFileNmNotExn);
                if (ini.JudgementNotExist(ExistUser, "sysdatabases", ref conn, ref ds, ref da))
                ...{
                    comm.CommandText = CreateUser;
                    comm.ExecuteNonQuery();
                    comm.CommandText = CreateAlter;
                    comm.ExecuteNonQuery();
                    comm.CommandText = AddRole;
                    comm.ExecuteNonQuery();
                }
                Console.WriteLine("Create Database User Complete");
            }
            catch (Exception e)
            ...{
                Console.WriteLine(e.ToString());
                Console.WriteLine();
                Console.WriteLine("We are sorry for the inconvenience caused to you.");
                Console.WriteLine("You will receive an email from us to help you find what you need.");
                Console.ReadLine();
            }
        }


    }
}

PS：注意，因为CommadTimeOut（即等待命令执行的时间）默认为30秒，如果你的数据库足够大的话，必须重新设置该值。不然将出现TimeOut警告