12.1.3 - 2026-10-15

Improvements

• Row gets a Columns parameter that sets how many columns fit on each line, so a layout with a fixed number of columns per line no longer needs Size on every RadzenColumn. ColumnsXS, ColumnsSM, ColumnsMD, ColumnsLG, ColumnsXL and ColumnsXX change it per breakpoint. Counts that do not divide 12, such as 5 or 7, work as well and Gap is respected. A column with its own Size for the current breakpoint keeps it (#2760).

Fixes

• Spreadsheet reads xlsx files with absolute relationship targets and cells without a reference, such as those written by SpreadCheetah, instead of showing empty sheets. A target like /xl/worksheets/sheet1.xml was prefixed with xl/ so the sheet was not found, and a <c> or <row> without the optional r attribute was dropped. Relationship targets are now resolved against their source part, for sheets as well as drawings, images, charts and tables, and a cell or row without a reference takes the position after the previous one (#2757).
• RadialGauge and ArcGauge no longer render C# source as text inside every scale tick. The tick label condition in the scale was missing its @, so if (!string.IsNullOrEmpty(tick.Value)) was emitted as a text node in each tick, which screen readers read once per tick, and an empty tick label was rendered even with ShowTickLabels="false".
• Carousel no longer jumps back to the first item after every navigation in right-to-left pages. RTL scroll containers report a negative scrollLeft, so the index computed from the scroll position was negative, got clamped to 0 and reset the selection right after Navigate or a pager click. The scroll handler now uses the absolute scroll offset.
• ODataServiceResult survives trimming when an app deserializes it through its own generic code, such as PersistentComponentState.TryTakeFromJson<T> or JsonSerializer.Deserialize<T> behind an unannotated helper. A trimmed Blazor WebAssembly app kept the type but lost its parameterless constructor and the Count and Value setters, so System.Text.Json threw NotSupportedException. Radzen.Blazor now embeds a trimmer descriptor that keeps these members whenever an app keeps the type.