I have already tried.
I am able to execute, if i replace the data source like below;
This code
string path =FileUploadContacts.PostedFile.FileName;
string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+path+";Extended Properties=Excel 12.0";
as like
string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Sample.xlsx;Extended Properties=Excel 12.0";
The problem is with the FileUpload Control.May be it is not taking the complete Path.
How can i resolve this?