datagridview - vb.net SQL causing - "Must declare the scalar variable " -

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i've been stuck on error while, in vb.net trying connect sql , pull data table within day, using parameters this, datetimepicker - data saved sql in custom datetime format dd/mm/yyyy hh:mm:ss,

when execute code

"must declare scalar variable "@line"

when remove code " [line] = @line , date >= @startdata , date < @enddata " works shows data without date range should.

connect()  datagridview1.autogeneratecolumns = true  cmd.parameters.clear()  cmd.commandtext = @"select board, defect, date, detail_x, detail_y,                            detail_width, detail_height                            [sqlccmdefects]                            [line] = @line                               , date >= @startdata                               , date < @enddata";  cmd.parameters.add("@line", sqldbtype.varchar, 30).value = form1.line.text cmd.parameters.add("@startdata", sqldbtype.datetime).value = datetimepicker1.value cmd.parameters.add("@enddata", sqldbtype.datetime).value = datetimepicker2.value cmd.executescalar()  dim dataadapter1 = new sqldataadapter(cmd.commandtext, con.connectionstring) dim table1 new datatable() table1.locale = system.globalization.cultureinfo.invariantculture dataadapter1.fill(table1) me.bindingsource1.datasource = table1  datagridview1.datasource = bindingsource1  disconnect()

all blank datagridview scalar error.

there looks couple of issues in code posted, try this:

    'sql connection     dim sqlcon new sqlconnection("server=.;database=dummy;trusted_connection=true;")      'sql command     dim sqlcmd new sqlcommand("", sqlcon)     sqlcmd.commandtext = "select board, defect, date, detail_x, detail_y, detail_width, detail_height [sqlccmdefects] [line] = @line , date >= @startdata  , date < @enddata"      'sql command params     sqlcmd.parameters.add("@line", sqldbtype.varchar, 30).value = "whatever"     sqlcmd.parameters.add("@startdata", sqldbtype.datetime).value = "2015-07-21"     sqlcmd.parameters.add("@enddata", sqldbtype.datetime).value = "2015-07-23"      'data adapters     dim dataadapter1 = new sqldataadapter(sqlcmd)     dim table1 new datatable()      'not sure does?     table1.locale = system.globalization.cultureinfo.invariantculture      'attach gv     dataadapter1.fill(table1)     datagridview1.autogeneratecolumns = true     bindingsource1.datasource = table1     datagridview1.datasource = bindingsource1

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