ASP.NET - how do i initial connection establish between the mysql and visual studio 2010

please ,
 how do i fetch the data from back end(mysql). in to asp.net web form

i dont now how to establish the connection to front end and back end .



for example i want to enter the student usn in one text box , then all othen text box fetches the data from according this usn ..
 please help me how do i establish the intial connection string.