mdf - Cannot connect project to a SQL Server database -

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i have problem while trying copy project folder hard drive. project in visual studio defined in h:\ , while run exe file project no problem while copy folder project hard drive have problem connect application sql server.

see these screenshots:

for example in login form , in login button code is:

private sub button1_click(byval sender system.object, byval e system.eventargs) handles button1.click         dim conn new sqlconnection("server=.\sqlexpress;attachdbfilename=" + environment.currentdirectory + "\database\automation.mdf;database=automation;trusted_connection=yes;")         s2 = "select count( * ) login username = '" & textbox1.text & "' , password = '" & textbox2.text & "'"         dim com new sqlcommand(s2, conn)         dim res object         conn.open()         res = com.executescalar()         conn.close()         if res = 1             msgbox("welcome dear " + textbox1.text, msgboxstyle.okonly, "login successful")             = textbox1.text             if = "admin"                 main.label4.text = "administrator"             else                 main.label4.text = "user"                 = textbox1.text                 main.button3.enabled = false                 main.button5.enabled = false                 main.button9.enabled = false             end if             main.show()             me.hide()         else             msgbox("invalid user or password", msgboxstyle.critical, "attention please")             textbox1.text = ""             textbox2.text = ""             exit sub         end if     end sub

you need specify database is, can't use environment.currentdirectory. currentdirectory uses path of current working directory. either move database same hard drive or change path database.

http://msdn.microsoft.com/en-us/library/system.environment.currentdirectory.aspx


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