sql server - How to update a datagridview using vb.net -


i using below mention code update , delete data datagridview. unable solve issue. delete working not update.

public sub customerupdatebatch(byval dt datatable)

    dim connection sqlconnection = new sqlconnection(invoice.getconnect())     connection.open()     try          dim command sqlcommand = new sqlcommand("update_customer", connection)         command.commandtype = commandtype.storedprocedure         command.parameters.add("@c_id", sqldbtype.int, 16, "c_id")         command.parameters.add("@c_name", sqldbtype.varchar, 50, "c_name")         command.parameters.add("@c_address", sqldbtype.varchar, 50, "c_address")         command.parameters.add("@c_tel", sqldbtype.varchar, 50, "c_tel")         command.parameters.add("@c_fax", sqldbtype.varchar, 50, "c_fax")         command.parameters.add("@c_mobile", sqldbtype.varchar, 50, "c_mobile")         command.parameters.add("@c_email", sqldbtype.varchar, 50, "c_email")         command.parameters.add("@c_tin", sqldbtype.varchar, 50, "c_tin")         command.parameters.add("@c_remarks", sqldbtype.varchar, 50, "c_remarks")         command.commandtype = commandtype.storedprocedure          dim delcommand sqlcommand = new sqlcommand("delete_customer", connection)         delcommand.commandtype = commandtype.storedprocedure         command.parameters.add("@c_id", sqldbtype.int, 16, "c_id")          dim adapter sqldataadapter = new sqldataadapter()         adapter.updatecommand = command         adapter.deletecommand = delcommand         adapter.deletecommand.updatedrowsource = updaterowsource.none         adapter.update(dt)      catch ex exception         console.writeline(ex.message)         throw             connection.close()     end try end sub

one possible issue has using auto-number indexes. when add new data table index not generated or picked db autmatically. don't database have, i'll show example mysql , ms sql.

first, need capture events data adapter. "connection" , "dataadapter" definitions need outside function: 

    dim withevents adapter sqldataadapter = new sqldataadapter()

then you'll need have function capture events:

private sub myadapter_rowupdated(byval sender object, byval e system.data.oledb.oledbrowupdatedeventargs) handles adapter.rowupdated     if (e.statementtype = statementtype.insert , e.status = updatestatus.continue)         dim id ulong = getidentity()         if (id > 0)             e.row(0) = id         end if     end if end sub

the getidentiy() function need specific sql server. 1 mysql:

public function getidentity() ulong         dim newcommand new mysqlcommand("select last_insert_id();", connection)         return newcommand.executescalar()     end function

here 1 ms sql:

public function getidentity() ulong         dim newcommand new oledbcommand("select @@identity", connection)         return newcommand.executescalar()  end function

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