C# 操作access数据库 - .NET技术 / C#

public class OleConn
  {
  private static OleDbConnection conn;

  private OleConn()
  { 
  }

  public static OleDbConnection getConn()
  {
  string db = @"Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
  string str = @"E:\C#\addressBook\addressBook\DataBase\MyBook.mdb";
  conn = new OleDbConnection(db+str);
  return conn;
  }
  }

这样的单例oleconn 连接类

//执行sql 带参数的数组
  public static bool ExecSQLParamters(OleDbParameter[] par, string sql)
  {
  try
  {
  using (OleDbCommand comm = new OleDbCommand(sql, OleConn.getConn()))
  {

  foreach (OleDbParameter pars in par)
  {
  comm.Parameters.Add(pars);
  }

   
  OleConn.getConn().Open();
   
  comm.ExecuteNonQuery();

  return true;
  }
  }
  catch
  {