fastreport显示带[] 方括号的文本或表达式

引言

Fastreport 默认使用 []标识变量及表达式，如果你显示的文本中有方括号就会报错

    FastReport.TextObjectBase.CalcAndFormatExpression(String expression,Int32 expressionIndex)
    FastReport.TextObject.GetData()
    FastReport.BandBase.GetData()
    FastReport.Engine.ReportEngine.PrepareBand(BandBase band, Boolean getData)        	FastReport.Engine.ReportEngine.ShowBandToPreparedPages(BandBase band, Boolean getData)
    FastReport.Engine.ReportEngine.ShowBand(BandBase band, Boolean getData)
    FastReport.Engine.ReportEngine.ShowDataBand(DataBand dataBand, Int32 rowCount)
    FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand, Int32 rowCount, Boolean keepFirstRow, Boolean keepLastRow)
    FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand)
    FastReport.Engine.ReportEngine.RunBands(BandCollection bands)       FastReport.Engine.ReportEngine.RenderOuterSubreports(BandBase parentBand)
    FastReport.Engine.ReportEngine.ShowBand(BandBase band, Boolean getData)
    FastReport.Engine.ReportEngine.ShowDataBand(DataBand dataBand, Int32 rowCount)
    FastReport.Engine.ReportEngine.RunDataBand(DataBand dataBand, Int32 rowCount, Boolean keepFirstRow, Boolean keepLastRow)    FastReport.Engine.ReportEngine.ShowGroupTree(GroupTreeItem root)     FastReport.Engine.ReportEngine.ShowGroupTree(GroupTreeItem root)
    FastReport.Engine.ReportEngine.RunGroup(GroupHeaderBand groupBand)
    FastReport.Engine.ReportEngine.RunBands(BandCollection bands)
    FastReport.Engine.ReportEngine.RunReportPage(ReportPage page)
    FastReport.Engine.ReportEngine.RunReportPages()
    FastReport.Engine.ReportEngine.RunReportPages(ReportPage page)
    FastReport.Engine.ReportEngine.Run(Boolean runDialogs, Boolean append, Boolean resetDataState, ReportPage page)
    FastReport.Report.Prepare(Boolean append)

此时你首先想到的就是转义，其实 Fastreport提供了简单的方法

解决办法

变量标识符叫 Brackets，它默认是 [,]，你可以把它替换成其它的 "<,>" ,、 ""；但是任何其它的标识符也难免有作为文本的时候，此时你可以删除 Brackets属性，那它就会直接把你的值作为变量来使用，而不会解析文本中的 []