创建数据库附加数据库等操作代码,CSharp代码库,德仔网

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【CSharp】创建数据库附加数据库等操作
作者:Dezai.CN / 发布于2013/5/12/ 454

	/// <summary>
	 /// 附加数据库方法
	 /// </summary>
	 /// <param name="strSql">连接数据库字符串，连接master系统数据库</param>
	 /// <param name="DataName">数据库名字</param>
	 /// <param name="strMdf">数据库文件MDF的路径</param>
	 /// <param name="strLdf">数据库文件LDF的路径</param>
	 /// <param name="path">安装目录</param>
	 private void CreateDataBase( string strSql, string DataName, string strMdf, string strLdf, string path)
	 {
	 SqlConnection myConn = new SqlConnection(strSql);
	 String str = null ;
	 try
	 {
	 str = " EXEC sp_attach_db @dbname='"+DataName+"',@filename1='"+strMdf+"',@filename2='"+strLdf+"'";
	 SqlCommand myCommand = new SqlCommand(str, myConn);
	 myConn.Open();
	 myCommand.ExecuteNonQuery();
	 MessageBox.Show("数据库安装成功！点击确定继续");//需Using System.Windows.Forms
	 }
	 catch(Exception e)
	 {
	 MessageBox.Show("数据库安装失败！" + e.Message+"\n\n"+"您可以手动附加数据");
	 System.Diagnostics.Process.Start(path);//打开安装目录
	 }
	 finally
	 {
	 myConn.Close();
	 }
	 }
	
	 public override void Install(System.Collections.IDictionary stateSaver)
	 {
	 string server = this.Context.Parameters["server"];//服务器名称
	 string uid = this.Context.Parameters["user"];//SQlServer用户名
	 string pwd = this.Context.Parameters["pwd"];//密码
	 string path = this.Context.Parameters["targetdir"];//安装目录
	 string strSql = "server=" + server + ";uid=" + uid + ";pwd=" + pwd + ";database=master";//连接数据库字符串
	 string DataName = "JXC";//数据库名
	 string strMdf = path + @"JXC.mdf";//MDF文件路径，这里需注意文件名要与刚添加的数据库文件名一样！
	 string strLdf = path + @"jxc_log.ldf";//LDF文件路径
	 base.Install(stateSaver);
	 this.CreateDataBase(strSql, DataName, strMdf, strLdf, path);//开始创建数据库
	 }

	
	 /// <summary>
	 /// 测试连接
	 /// </summary>
	 /// <param name="serverName"></param>
	 /// <param name="dbName"></param>
	 /// <param name="userName"></param>
	 /// <param name="password"></param>
	 private SqlConnection TestConnection(string serverName, string dbName, string userName, string password)
	 {
	 string connectionString = GetConnectionString(serverName, dbName, userName, password);
	 SqlConnection connection = new SqlConnection(connectionString);
	 try
	 {
	 if (connection.State != ConnectionState.Open)
	 {
	 connection.Open();
	 }
	 return connection;
	 }
	 catch
	 {
	 CloseConnection(connection);
	 throw new InstallException("安装失败!\n数据库配置有误,请正确配置信息！");
	 }
	 }

	
	 /// <summary>
	 /// 得到连接字符串
	 /// </summary>
	 /// <param name="serverName"></param>
	 /// <param name="dbName"></param>
	 /// <param name="userName"></param>
	 /// <param name="password"></param>
	 /// <returns></returns>
	 private string GetConnectionString(string serverName, string dbName, string userName, string password)
	 {
	 string connectionString = "Data Source={0};Initial Catalog={1};User ID={2};Password={3}";
	 connectionString = string.Format(connectionString, serverName, dbName, userName, password);
	 return connectionString;
	 }

	 /// <summary>
	 /// 创建数据库
	 /// </summary>
	 /// <param name="serverName"></param>
	 /// <param name="dbName"></param>
	 /// <param name="userName"></param>
	 /// <param name="password"></param>
	 /// <param name="connection"></param>
	 /// <param name="stateSaver"></param>
	 public int CreateDataBase(SqlConnection connection)
	 {
	 int result = -1;
	 connection.ChangeDatabase("master");
	 string createDBSql = @" if Exists(select 1 from sysdatabases where [name]=N'{0}')
	 begin
	 drop database {0}
	 end
	 GO
	 CREATE DATABASE {0} ";
	 createDBSql = string.Format(createDBSql, _dbName);

	 //因为有Go在SQLCommand中不认识，所以以Go为分隔符取sql语句

	 char[] split = new char[] { 'G', 'O' };
	 string[] sqlList = createDBSql.Split(split);

	 SqlCommand command = null;
	 try
	 {
	 command = connection.CreateCommand();
	 command.CommandType = System.Data.CommandType.Text;
	 foreach (string sqlItem in sqlList)
	 {
	 if (sqlItem.Length > 2)
	 {
	 command.CommandText = sqlItem;
	 result = command.ExecuteNonQuery();
	 }
	 }
	 return result;
	 }
	 catch
	 {
	 CloseConnection(connection);
	 command.Dispose();
	 throw new InstallException("安装失败!\n数据库配置不正确!");
	 }
	 }

	 /// <summary>
	 /// 分隔SQL语句
	 /// </summary>
	 /// <param name="sql"></param>
	 /// <returns></returns>
	 private string[] splitSql(string sql)
	 {
	 Regex regex = new Regex("^GO", RegexOptions.IgnoreCase | RegexOptions.Multiline);
	 string[] sqlList = regex.Split(sql.ToUpper());
	 return sqlList;
	 }
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