vb.net - Error "Unable To Find Table Mapping Or Data Table" when trying to update MSSQL table via datagridview -

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hi using datagridview display data sql server, want when edited cell in datagridview database table updated too. code populating datagridview this:

    dim datest sqldataadapter = new sqldataadapter("select * tblpaymtc", strcon)     dim cbtest sqlcommandbuilder = new sqlcommandbuilder(datest)     dim dstest dataset = new dataset     datest.fill(dstest)     dg1.datasource = dstest.tables(0)

when button clicked use code: 

    datest.update(dstest)

any appreciated.

add line too...

dg1.datamember = "tblpaymtc"


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