2015-07-09 104 views
0

我想创建一个包含两列数据的XY散点图。第一列是从单元格A2到A30的X,第二列是从Excel单元格中的B2到B30的Y.如何使用VB.Net在Excel中设置一系列的XValues

我可以创建图表,但它是绘制两个系列的数据,它将col X作为一个系列,并将col Y作为另一个系列。因为我不知道vb.net中的语法是如何工作的,并且我无法找到关于如何在vb.net中执行此操作的文档,所以我从vba文档中获得了一些想法(可以在vba中这样定义它:

 Charts("Chart1").SeriesCollection(1).XValues =_Worksheets("Sheet1").Range("B1:B5") 

,并产生以下行

于是,我就用线

xlApp.ActiveChart.SeriesCollection(1).XValues = xlWorkSheet.Range("$A$2", "$A$30") 
    xlApp.ActiveChart.SeriesCollection(1).Values = xlWorkSheet.Range("$B$2", "$B$30") 

设置一系列的XValues但它是在我抛出的错误:收到COMException是以上行未处理。我不确定我做错了什么,所以请帮忙。

以下是生成图表的代码块。基本上,它是在Excel文件中读取数据,然后使用文件中的数据创建图表。

Private Sub Create_Chart_Click(sender As Object, e As EventArgs) Handles Create_Chart.Click 
    Dim xlApp As Excel.Application 
    Dim xlWorkBook As Excel.Workbook 
    Dim xlWorkSheet As Excel.Worksheet 
    xlApp = New Excel.ApplicationClass 

    '~~> Add a New Workbook 
    xlWorkBook = xlApp.Workbooks.Open("C:\Test_data.xlsx") 

    'Display Excel 
    xlApp.Visible = True 

    '~~> Set the relebant sheet that we want to work with 
    xlWorkSheet = xlWorkBook.Sheets("Sheet1") 

    With xlWorkSheet 

     '~~> Inserting a Graph 
     .Shapes.AddChart.Select() 

     '~~> Formatting the chart 
     With xlApp.ActiveChart 
      '~~> Make it a Line Chart 
      .ApplyCustomType(Excel.XlChartType.xlXYScatterSmoothNoMarkers) 

      '~~> Set the data range 
      xlApp.ActiveChart.SeriesCollection(1).Name = "X-Y" 
      xlApp.ActiveChart.SeriesCollection(1).XValues = xlWorkSheet.Range("$A$2", "$A$30") 
      xlApp.ActiveChart.SeriesCollection(1).Values = xlWorkSheet.Range("$B$2", "$B$30") 

      '~~> Fill the background of the chart 
      xlApp.ActiveChart.ChartArea.Format.Fill.ForeColor.ObjectThemeColor = _ 
      Microsoft.Office.Core.MsoThemeColorIndex.msoThemeColorBackground1 '<~~ Grey 
      xlApp.ActiveChart.ChartArea.Format.Fill.ForeColor.TintAndShade = 0 
      xlApp.ActiveChart.ChartArea.Format.Fill.ForeColor.Brightness = -0.150000006 
      xlApp.ActiveChart.ChartArea.Format.Fill.Transparency = 0 
      xlApp.ActiveChart.ChartArea.Format.Fill.Solid() 
      xlApp.ActiveChart.SeriesCollection(1).Trendlines.Add() 
      xlApp.ActiveChart.SeriesCollection(1).Trendlines(1).Type = Microsoft.Office.Interop.Excel.XlTrendlineType.xlPolynomial 
      xlApp.ActiveChart.SeriesCollection(1).Trendlines(1).Order = 2 
      'xlApp.ActiveChart.SeriesCollection(1).Format.Line.Visible = Microsoft.Office.Core.MsoTriState.msoFalse 





      '~~> Make the corners of the Chart Rount 
      '.Parent.RoundedCorners = True 

      '~~> Removing lines and the back color so plot area shows char's background color 
      With .PlotArea 
       .Format.Fill.Visible = Microsoft.Office.Core.MsoTriState.msoFalse 
       .Format.Line.Visible = Microsoft.Office.Core.MsoTriState.msoFalse 
      End With 

      '~~> Removing the major gridlines 
      '.Axes(Excel.XlAxisType.xlValue).MajorGridlines.Format.Line.Visible = Microsoft.Office.Core.MsoTriState.msoFalse 

      '~~> Making the series line smooth 
      '.SeriesCollection(1).Smooth = True 

      '~~> Formatting the legend 
      With .Legend 
       With .Format.TextFrame2.TextRange.Font.Fill 
        .Visible = Microsoft.Office.Core.MsoTriState.msoTrue 
        .ForeColor.RGB = RGB(0, 0, 0) 
        .Transparency = 0 
        .Solid() 
       End With 

       With .Format.Fill 
        .Visible = Microsoft.Office.Core.MsoTriState.msoTrue 
        .ForeColor.ObjectThemeColor = Microsoft.Office.Core.MsoThemeColorIndex.msoThemeColorBackground1 
        .ForeColor.TintAndShade = 0 
        .ForeColor.Brightness = -0.25 
        .Transparency = 0 
        .Solid() 
       End With 
      End With 

      '~~> Change the format of Y axis to show $ signs 
      '.Axes(Excel.XlAxisType.xlValue).TickLabels.NumberFormat = "#,##0.00" 

      '~~> Underline the Chart Title 
      ' .ChartTitle.Format.TextFrame2.TextRange.Font.UnderlineStyle = _ 
      ' Microsoft.Office.Core.MsoLineStyle.msoLineSingle 
     End With 
    End With 

End Sub 

感谢

+0

您将这些属性设置为公式。 '.Values =“='Sheet1'!$ A $ 2:$ A $ 30”'和'.Values =“='Sheet1'!$ B $ 2:$ B $ 30”'。 – TnTinMn

+0

@TnTinMn,你可以为'Values'和'XValues'提供'Range'对象。创建这种方式时,图表是否实际上具有“系列”?我通常会通过“ChartObjects.Add”然后通过“SeriesCollection.NewSeries”来获取系列。如果是这种情况,我想'.Name'会先失败。无论如何,这里是工作的C#代码来做到这一点。 http://stackoverflow.com/questions/30590070/generate-scatter-graph-in-vb-net/30598519#30598519。可能想验证你的Range是否正确创建。在杂散的线上尝试'Range.Select',以确保它是正确的。 –

+0

谢谢。它完美的作品。 – bill

回答

0

请试着喜欢这个

xlApp.ActiveChart.SeriesCollection(1).XValues = "={""tes1"",""Test2""}" 

MyVal="{""" & xlWorkSheet.range("A2") & """" 
MyVal=MyVal & ",""" & xlWorkSheet.range("A30") & """}" 
xlApp.ActiveChart.SeriesCollection(1).XValues = MyVal 
0

XValues实际上可以例如数组:

Dim MyXVal() as string={"123","345","567"} 
xlApp.ActiveChart.SeriesCollection(1).XValues = MyXVal 
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