vb.net - How to sort datagridview columns programatically -

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i being asked sort columns on vb.net created datagridview. it's not code i'm trying help. here part of code:

try         dim sqlselect string = "select  * manpower logouttime null , logindate = #" & datetoday & "# order customername"          dim mydataadapter = new oledbdataadapter(sqlselect, myworkforceconnection)          mycommandbuilder = new oledbcommandbuilder(mydataadapter)          mydataadapter.fill(mydatatable)      catch ex exception         msgbox(ex.message)          exit sub     end try      if mydatatable.rows.count = 0         messagebox.show("no records found.")         exit sub     end if      dgvmanpower.datasource = mydatatabl      dgvmanpower.columns("id").visible = false      dgvmanpower.columns("employeename").width = 175     dgvmanpower.columns("employeename").sortmode = datagridviewcolumnsortmode.automatic     dgvmanpower.columns("employeename").headertext = "employee name"

when run application i'm not able sort on employeename column. microsoft documentation claims glyph added column header doesn't appear either. how can column "sort-able" ?

i can't see in code stop sorting.

check datagridview settings in ide, , ensure datagridview has enabled=true, , columnheadersvisible=true.

then click column header , see happens.


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