chart辅助线,更换条件后无法清除了。多次重画的结果就是图表上到处都是辅助线了
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以下是画辅助线的代码,在Y坐标变化后,再次生成时,结果出现了二条辅助线,有什么办法可以清除之前画的辅助线吗?
Dim C1Cha As C1.Win.C1Chart.C1Chart = Chart.BaseControl
Dim tl As C1.Win.C1Chart.TrendLine = C1Cha.ChartGroups(0).ChartData.TrendsList.AddNewTrendLine()
tl.LineStyle.Color = Color.blue '.Gold '线条颜色
tl.LineStyle.Thickness = 1 '线宽
tl.LineStyle.Pattern = 0 '直线样式 0-5
Dim zxb = New zxb柱状图标辅助线()
zxb.SetXY(New PointF(minsjxh-0.5,10),New PointF( maxsjxh -0.5 ,10)) !
tl.CustomTrendLine = zxb