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DataGrid Grouping Expanded to false at first render #371

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opened 2026-01-29 17:36:14 +00:00 by claunia · 0 comments
claunia commented 2026-01-29 17:36:14 +00:00
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Originally created by @daletman on GitHub (Apr 12, 2022).

Describe the bug
When you use

void OnGroupRowRender(GroupRowRenderEventArgs args) { if (args.FirstRender) { args.Expanded = false; } }

to make the rows collapsed at first render, all rows will expand, if you expand and collapse a single row.

To Reproduce

  1. Go to: https://blazor.radzen.com/datagrid-grouping-api
  2. Close the expanded row.
  3. All (in this example it's only one) other collapsed rows will expand.

Expected behavior
All other rows should stay collapsed.

Originally created by @daletman on GitHub (Apr 12, 2022). **Describe the bug** When you use `void OnGroupRowRender(GroupRowRenderEventArgs args) { if (args.FirstRender) { args.Expanded = false; } }` to make the rows collapsed at first render, all rows will expand, if you expand and collapse a single row. **To Reproduce** 1. Go to: https://blazor.radzen.com/datagrid-grouping-api 2. Close the expanded row. 3. All (in this example it's only one) other collapsed rows will expand. **Expected behavior** All other rows should stay collapsed.
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Reference: starred/radzen-blazor#371
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