We can use a simple attribute in <apex:page> Component . 
that is contentType="application/vnd.ms-excel#contacts.xls"
So that file name with contact is downloaded.But we can save to a folder.For Ex: i want to save it to c:/folder/Contacts.xls? somehing like this

Hi i have a custom button on detai page.On click opens a VF page - where i have a save button.
On click of save , it inserts sme records. so after that i have to return to detail page.which i can.
But i want is the "Thank You! (n) Records inserted" some thing like this message.

We can use a simple attribute in <apex:page> Component . 
that is contentType="application/vnd.ms-excel#contacts.xls"
So that file name with contact is downloaded.But we can save to a folder.For Ex: i want to save it to c:/folder/Contacts.xls? somehing like this

Hi i have a custom button on detai page.On click opens a VF page - where i have a save button.
On click of save , it inserts sme records. so after that i have to return to detail page.which i can.
But i want is the "Thank You! (n) Records inserted" some thing like this message.

I have a custom object. And I have a field Name and ID.. How can I display these fileds in Visual Force page, using custom controller.
Thank you in advance.