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My DataGrid is bound to a DataSet, with following columns: Description, CashExp, CreditExp,Frequency
On run time, I am adding two new DataColumn “AnnualCash” and “AnnualCredit” and defining Expression property to give product of two columns, as follows
Dim dc As DataColumn
dc = New DataColumn("AnnualCash", GetType(System.Single))
dc.Expression = " CashExp * Frequency"
myDataSet.Tables("ClientExpenses").Columns.Add(dc)
dc = New DataColumn("AnnualCredit", GetType(System.Single))
dc.Expression = " CreditExp * Frequency"
myDataSet.Tables("ClientExpenses").Columns.Add(dc)
The only problem I am getting is when CashExp or CreditExp or Frequency is changed the value of derived column is not changed (calculated) until user changes the row either by tab or arrow keys.
How can I change this behaviour so that the derived columns gets calculated when user edit values in a cell.
