vb.net - error deleting from database -


i have sql server compact database created through vs 2010 (local database file option). on form load (categoryform) load values database datagridview1. add buttoncolumn programmatically use delete part. problem this:

  • on initial form load, first time press delete on row, works. if press again not work.
  • the second time click button, printed text on msgbox, text of button! (delete) (screenshot included) p.s mentionted below, when comment-out stuff, correct values returned.

what tried:

  • commented out sql-related, left part rowindex , value @ specific cell @ index. print them both on msgbox. values correct. example, 0 index , value test first row text test.

below progress screenshots:

cellcontentclick method:

private sub datagridview1_cellcontectclick(byval sender object, byval e system.windows.forms.datagridviewcelleventargs) handles datagridview1.cellcontentclick      dim string      'if e.columnindex = 1     'if e.rowindex >= 0 , e.rowindex <= datagridview1.rows.count - 1      = datagridview1.rows(e.rowindex).cells(0).value.tostring     msgbox(e.rowindex)     msgbox(i)     sqlstringdelete = "delete category categoryname = '" & & "'"     sqlconn.connectionstring = connstring 'set connection string     sqlconn.open() 'open connection     sqlcmd.connection = sqlconn 'sets connection use sql command     sqlcmd.commandtext = sqlstringdelete 'sets sql string     sqlcmd.executenonquery() 'executes sql command      'create adapter     dim dataadapter sqlcedataadapter = new sqlcedataadapter("select categoryname category", sqlconn)     'create dataset     dim dataset new dataset     'fill datset     dataadapter.fill(dataset)     'attach dataset datagrid     datagridview1         .datasource = dataset.tables(0)         .columns(0).headertext = ""         .columns(0).autosizemode = datagridviewautosizecolumnmode.fill     end      dataadapter = nothing     dataset = nothing      sqlconn.close() 'close connection    end sub

form_load method:

 private sub categoryform_load(byval sender system.object, byval e system.eventargs) handles mybase.load         sqlconn.connectionstring = connstring 'set connection string         sqlconn.open() 'open connection          'create adapter         dim dataadapter sqlcedataadapter = new sqlcedataadapter("select categoryname category", sqlconn)         'create dataset         dim dataset new dataset         'fill datset         dataadapter.fill(dataset)         'attach dataset datagrid         datagridview1             .datasource = dataset.tables(0)             .columns(0).headertext = ""             .columns(0).autosizemode = datagridviewautosizecolumnmode.fill         end          dataadapter = nothing         dataset = nothing         sqlconn.close()          buttoncolumn             .name = "deletebuttoncolumn"             .headertext = ""             .text = "delete"             .usecolumntextforbuttonvalue = true             .autosizemode = datagridviewautosizecolumnmode.fill             .width = 50         end          if datagridview1.columns.count = 1             datagridview1.columns.add(buttoncolumn)         end if      end sub

screenshots:

button text returned instead of cell value

still there after several click :)

turns out columns autoregenerating causing column re-arrangement on each second click. set datagridview1.autogeneratecolumns = false in both form load , event , works.


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