Enable / Disable grid rows dynamically

Enable / Disable grid rows dynamically

To enable / disable grid rows conditionally, use a savevalue false field named "axpvalid+ {dc number}" with an expression to return a character between [a-d]
eg. if the grid dc is dc2 then the field name should be defined as axpvalid2. Following are different expressions, available to control the grid.

{a} - Enable the row
{b} - Disable delete button
{c} - Disable row completely 
{d} - Disable row but allow to delete.

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