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lhbib
65
Exception by group by column
posted

Hi,

I have a grid with 3 column e.g. select, person and old .

I can disable the cell "select" Grid1.Rows[0].Cells["Select"].Activation = Activation.Disabled

this work fine.

And now  if I group the Grid by the column person , there is exception because Grid1.Rows[0].Cells is null.

How can I fix this bug?

Thanks

Habib

  • 69832
    Offline posted

    Grid1.Rows[n].Cells cannot possibly return null because the Cells property automatically creates an instance and returns it. If you are accessing Grid1.Rows[0].Cells at a point when there are no rows, that would cause an IndexOutOfRangeException; the way to remedy this is to check Grid1.Rows.Count before accessing any members. Generally speaking, the way to prevent a null reference exception is to check for null before accessing any object that can be null.