お会いできてとてもうれしいです。
I'm very glad to see you.
お会いできてとてもうれしいです。
I'm very [most] happy to meet you.
I am really glad that you participated for us.
I will be very happy to accept your invitation.
I'm glad [pleased] to see you.=It's nice to see you.
お目にかかれてうれしく存じます。