search sql database data from winForm using link labl conrol

Question

Sir I am now doing a C# windows form project with database.

I have 21 forms in my project and a database.

among my forms, i have form named frmStudent.

it has a label named lnksearchApplicationFormNo(using to search database data by application form no.

My database table name representing this form is tbl_Student.

it has a column named 'applicatnformNo'.

how can  search the applicatnformNo in linklabel1_click_event?

and also i want to display all data  retrieved from the database in the concerned fields.

please help me by write coding.