Dim dt1 As Date = Forms("窗口1").Controls("DateTimePicker1").Value
Dim dt2 As Date = Forms("窗口1").Controls("DateTimePicker2").Value
\'第一个图表
Dim Chart As WinForm.Chart \'定义一个图表变量
Dim Series As WinForm.ChartSeries \'定义一个图系变量
Chart = Forms("窗口1").Controls("Chart1") \' 引用窗口中的图表
Chart.ChartType = ChartTypeEnum.XYPlot \'设置图表类型
Chart.AxisX.DateType = True \'明确指定X轴是日期型
Chart.AxisX.AnnoFormatString = "MM-dd" \'制定日期表示格式
Chart.SeriesList.Clear() \'清除图表原来的图系
Series = Chart.SeriesList.Add() \'增加一个图系
Dim drs As List(Of DataRow)
drs = DataTables("表A").Select("日期 >= \'" & dt1 & "\' And 日期 <= \'" & dt2 & "\'")
Series.Length = drs.Count \'图系n个数据点
For i As Integer = 0 To drs.Count - 1 \'遍历所有行
Series.X(i) = drs(i)("日期") \'指定水平坐标
Series.Y(i) = drs(i)("预测") \'垂直坐标用随机数生成
Next
Series.LineColor = Color.Blue \'设置该图系的颜色
Series.MarkShape = MarkShapeEnum.Dot
Series.MarkColor = Color.Green
Series.Text = "预测"
\'第二个图表
Chart.ChartType2 = ChartTypeEnum.XYPlot
Chart.SeriesList2.Clear()
Series = Chart.SeriesList2.Add()
Series.Length = drs.Count \'图系n个数据点
For i As Integer = 0 To drs.Count - 1 \'遍历所有行
Series.X(i) = drs(i)("日期") \'指定水平坐标
Series.Y(i) = drs(i)("实际") \'垂直坐标用随机数生成
Next
Series.LineColor = Color.Red
Series.MarkShape = MarkShapeEnum.Dot
Series.MarkColor = Color.Yellow
Chart.AxisY.GridMajorVisible = False \'隐藏Y2轴的网格线
Series.Text = "实际"
\'Chart.AxisX.AnnoWithLabels = True \'启用字符标示(启用后不显示日期)
Chart.VisualEffect = True \'加上这一行,让你的图表更漂亮
Chart.LegendVisible = True \'显示图列
Chart.LegendCompass = CompassEnum.South \'图列显示在南方(底端)
此主题相关图片如下:截屏图片 (7).jpg