C#创建数据库 附加数据库等操作

/// <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;
}