public static void ConnCheck()
{
try
{
DbAccess._ConnCheck(ConnString);
}
catch (Npgsql.PostgresException pgEx)
{
switch (pgEx.SqlState)
{
case "3D000": //3D000: database "xxx" does not exist (INVALID CATALOG NAME)
throw new Exception("系统数据库访问出错，无效的数据库目录名。", pgEx);
case "28P01": //28P01: password authentication failed for user "xxx"
throw new Exception("系统数据库访问出错，用户名密码不正确。", pgEx);
default:
throw new Exception("系统数据库访问出错，可能是配置不正确。", pgEx);
}
}
catch (System.Net.Sockets.SocketException socketEx)
{
if (socketEx.ErrorCode == 10061)
{
throw new Exception("系统数据库访问出错，可能是地址或端口配置不正确。", socketEx);
}
throw new Exception("系统数据库访问出错，可能是配置不正确。", socketEx);
}
catch (TimeoutException ex)
{
throw new Exception("系统数据库访问超时，可能是地址配置不正确。", ex);
}
catch (Exception ex)
{
throw new Exception("初始化系统数据库访问组件出错", ex);
}
}