connectivity code for vb.net

//try this code for your sqlconnection
//first of all declare all Required object in form class
//eg. below is declarations

dim objcon as sqlclient.sqlconnection

//then on formload event add code whis is given below

objcon=new sqlclient.sqlconnection
objcon.connectionstring("datasource=sqlservername;initial catalog=databasename; integratedSecurity=True")

//your sqlconnection established here properly
// if you want to inser some values in table then look here
// double click on your insert button and write this code

private sub btninsert(bayval sender as object,byval e as eventargs) handles btninsert.click

dim objcom as new sqlclient.sqlcommand("insert into table values('"+textbox1.text+"','"+textbox2.text+"')",objcon)

objcon.open()

objcom.executenonquery()

objcon.close()


end sub

// then textbox values will be inserted successfully