Hello Brice Mason,
I found that adding an aggregate function in the constructor is too early when working with autogenerated columns - as the columns at this stage are not initialized yet.
This is definitely something that needs an improvement by our side, so we are going to fix this.
Meanwhile I am offering the following workaround :
.RadGridView1.ItemsSource = GetListOfItems();
sender, EventArgs e)
CountFunction f =
Basically what we do here is to set the aggregate function once , immediately after the grid is rendered.
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