sql - Why is Data Not Saved to the Database in my Guestbook Application? -

i creating application requires guestbook.. data database appears on website data enter website doesn't automatically put database.

here code have..

protected sub butsign_click(sender object, e eventargs) handles butsign.click   dim strdsn string = "provider=microsoft.jet.oledb.4.0;" & "  data source=c:\users\shauna watson\desktop\project copies\final\app_data\factory.mdf"   dim strsql string = (((("insert guestbook " & "( name,address,email,comments)" & "values ('")  + txtname.text.tostring() & " ',' ") + txtaddress.text.tostring() & " ', '") + txtemail.text.tostring() & " ',' ") + txtcomments.text.tostring() & " ')"       ' set access connection , select strings       ' create oledbdataadapter      dim myconn new oledbconnection(strdsn)      'create ole db command , call executenonquery execute      ' sql statement       dim mycmd new oledbcommand(strsql, myconn)      try         myconn.open()         mycmd.executenonquery()     catch exp exception         console.writeline("error: {0}", exp.message)     end try     myconn.close()     ' open thans.aspx page after adding entries guest book      response.redirect("guestbookthanks.aspx") end sub 

i'm wondering if can spot may have missed!

you try changing code this:

    myconn.open()     dim mycmd new oledbcommand     mycmd         .connection = myconn         .commandtype = commandtype.text         .commandtext = "insert guestbook (name,address,email,comments) values (@name,@address,@email,@comments)"         .parameters.add("@name", oledbtype.varchar).value = txtname.text         .parameters.add("@address", oledbtype.varchar).value = txtaddress.text         .parameters.add("@email", oledbtype.varchar).value = txtemail.text         .parameters.add("@comments", oledbtype.varchar).value = txtcomments.text     end     mycmd.executenonquery()     myconn.close() 

don't put in try block. if error, post it, , we'll see error is.