supports calculated columns which are identified by an expression. The only condition necessary to make a regular column behave like a calculated column is to set an expression to it. Additional information is available in the following help article: https://docs.telerik.com/devtools/winforms/gridview/columns/calculated-columns-(column-expressions)
This approach is suitable for expression columns which use columns from the same hierarchy level. However, if you need to display in the parent level the sum of the child rows, it is necessary to do it programmatically by iterating the ChildRows
collection for each parent row and evaluating the sum. Then, the obtained result should be assigned to the respective parent cell's value.
Note that most of the forum threads are reviewed by Telerik representatives and sometimes we address the questions asked by our customers in the forums as well. However, a post in the forum doesn't guarantee you a response from the Telerik support team. Moreover, threads are handled according to license and time of posting, so if it is an urgent problem, we suggest you use a support ticket, which would be handled before a forum thread. In the support ticket you can also provide a runnable sample project demonstrating the undesired behavior that you are facing. Thus, our support staff will gladly assist you.
I hope this information helps.
Dess | Tech Support Engineer, Sr.
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