How to create own DataColumn Aggregate function

[whiteboy]

I want to create my own Aggregate function to be used in the
DataColumn.Expression property.

So for example,
DataColumn col = new DataColumn("foo", typeof(String));
col.Expression = "my_custom(Child.Test)";

Anyone done this before? Any suggestions on where to start?

thanks

 

[Miha Markic [MVP C#]]

I would implement ColumnChanged and RowChanged event and do the calculation
there.
What exactly do you need?