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Editorial Team
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Asked: 2026-05-30T22:57:10+00:00

I have a Rad Grid View that I’m using to display some data and

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I have a Rad Grid View that I’m using to display some data and it may or may not contain child rows. I also implemented grouping with aggregate functions. Everything works right until I show the child grids. It throws an Index Out of Bounds Exception after expanding the child rows in this part of the code.

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I also noticed that the columns are doubled when I expand one of the child rows.

Pic 1. Working all right

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Pic 2. Doubled columns after expanding.

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Any ideas if gropuing with child rows is supported? I did not see any example in Telerik’s web page.

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1 Answer

  1. Editorial Team

    It turned out I had an error with my code. Since the grid columns are populated dynamically through the code, I was running the grouping code in the initialization of the children grid.

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