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.NET confusing again

the title cause by not explained well the error that caused it when displaying Datagrid :(

took me an hour to resolve this..
only missing a piece of code -> DataKeysField = "Column_ID"
otherwise the datagrid won't update, delete

well i now frustating by other problems too..why it won't displayed correctly,means..the displayed is beyond the screen resolution width..not sure what to change or put ..been trying this for 2 days

:(

anyone???
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