修复GetMinMaxData在showDataDimension未初始化时返回异常的问题 (#365)

Documentation~/zh/changelog.md

@@ -81,6 +81,7 @@ slug: /changelog
 
 ## master
 
+* (2026.06.03) 修复`GetMinMaxData`在`showDataDimension`未初始化时返回异常的问题 (#365)
 * (2026.06.03) 增加`Tooltip`通过`TitleLabelStyle`的`TextStyle`的`Alignment`设置标题的对齐方式 (#363)
 * (2026.05.25) 增加`DataZoom`的`filterAxisRange`设置坐标轴的范围计算是否受`DataZoom`的影响
 * (2026.05.23) 优化`DataZoom`的`Marquee`框选功能

Runtime/Component/DataZoom/DataZoomHelper.cs

@@ -46,7 +46,7 @@ namespace XCharts.Runtime
                         {
                             double serieMinValue = 0;
                             double serieMaxValue = 0;
-                            SerieHelper.GetMinMaxData(serie, out serieMinValue, out serieMaxValue, null, 2);
+                            SerieHelper.GetMinMaxData(serie, 0, out serieMinValue, out serieMaxValue);
                             if (serieMinValue < min)
                                 min = serieMinValue;
                             if (serieMaxValue > max)

Runtime/Serie/SerieHelper.cs

@@ -159,7 +159,7 @@ namespace XCharts.Runtime
         /// <param name="min"></param>
         /// <param name="max"></param>
         /// <param name="dataZoom"></param>
-        public static void GetMinMaxData(Serie serie, out double min, out double max, DataZoom dataZoom = null, int dimension = 0)
+        public static void GetMinMaxData(Serie serie, out double min, out double max, DataZoom dataZoom = null)
         {
             max = double.MinValue;
             min = double.MaxValue;
@@ -169,11 +169,9 @@ namespace XCharts.Runtime
                 var serieData = dataList[i];
                 if (serieData.show)
                 {
-                    var count = 0;
-                    if (dimension > 0) count = dimension;
-                    else count = serie.showDataDimension > serieData.data.Count ?
-                        serieData.data.Count :
-                        serie.showDataDimension;
+                    var count = serie.showDataDimension > 0 && serie.showDataDimension < serieData.data.Count ?
+                        serie.showDataDimension :
+                        serieData.data.Count;
                     for (int j = 0; j < count; j++)
                     {
                         var value = serieData.data[j];