其他 - 注释列表增加空判断

Demo/Examples/Compdfkit_Tools/Annotation/PDFAnnotationList/PDFAnnotationListControl/CPDFAnnotationListControl.xaml.cs

@@ -67,7 +67,11 @@ namespace Compdfkit_Tools.PDFControl
             else
             {
                 BaseAnnot baseAnnot= pdfViewer.PDFToolManager.GetCacheHitTestAnnot();
-                AnnotationList.SelectAnnotationChanged(baseAnnot.GetAnnotData().PageIndex,baseAnnot.GetAnnotData().AnnotIndex);
+                AnnotData annotData = baseAnnot?.GetAnnotData();
+                if(annotData != null)
+                {
+                    AnnotationList.SelectAnnotationChanged(annotData.PageIndex, annotData.AnnotIndex);
+                }
             }
         }