我已经得到了下面的一段代码,但它没有给我任何输出。{BR} Dim objc As New DistrictPreviousTrends
Dim objlist As New List(Of DistrictPreviousTrends)
objlist = objc.GetTrends()
Chart3.DataBindCrossTable(objlist, "District_Name", "AcademicYear", "Rate", "")
For Each item In Chart3.Series
item.ChartType = SeriesChartType.Area
item.IsValueShownAsLabel = True
Next