Bind to BusinessObject is Failure

rivensun

System.InvalidOperationException: 集合已修改；可能无法执行枚举操作。
在 System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
在 System.Collections.Generic.List`1.Enumerator.MoveNextRare()
在 System.Collections.Generic.List`1.Enumerator.MoveNext()
在 FastReport.Engine.ReportEngine.ShowReprintHeaders()
在 FastReport.Engine.ReportEngine.StartColumn()
在 FastReport.Engine.ReportEngine.StartPage()
在 FastReport.Engine.ReportEngine.EndPage(Boolean startPage)
在 FastReport.Engine.ReportEngine.EndColumn(Boolean showColumnFooter)
在 FastReport.Engine.ReportEngine.AddToPreparedPages(BandBase band)
在 FastReport.Engine.ReportEngine.ShowBandToPreparedPages(BandBase band, Boolean getData)
在 FastReport.Engine.ReportEngine.ShowBand(BandBase band, Boolean getData)
在 FastReport.Engine.ReportEngine.ShowDataBand(DataBand dataBand, Int32 rowCount)
在 FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand, Int32 rowCount, Boolean keepFirstRow, Boolean keepLastRow)
在 FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand)
在 FastReport.Engine.ReportEngine.RunBands(BandCollection bands)
在 FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand, Int32 rowCount, Boolean keepFirstRow, Boolean keepLastRow)
在 FastReport.Engine.ReportEngine.ShowGroupTree(GroupTreeItem root)
在 FastReport.Engine.ReportEngine.ShowGroupTree(GroupTreeItem root)
在 FastReport.Engine.ReportEngine.RunBands(BandCollection bands)
在 FastReport.Engine.ReportEngine.RunReportPage(ReportPage page)
在 FastReport.Engine.ReportEngine.RunReportPages()
在 FastReport.Engine.ReportEngine.RunReportPages(ReportPage page)
在 FastReport.Engine.ReportEngine.Run(Boolean runDialogs, Boolean append, ReportPage page)
在 FastReport.Report.Prepare(Boolean append)
在 FastReport.Report.Prepare()
在 FastReport.Design.ReportTab.Preview()

AlexTZ

Hello,

I need the test project that demonstrates the error. You can send it to tz@fast-report.com.