Vb.net 检查图表区域是否为空
我正在开发一个Windows窗体应用程序来绘制图表。根据数据的可用性,将绘制图表Vb.net 检查图表区域是否为空,vb.net,charts,Vb.net,Charts,我正在开发一个Windows窗体应用程序来绘制图表。根据数据的可用性,将绘制图表 Private Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles generatePlot.Click ClearChart() 'Clear existing chart series Try 'Doing a very long process here to
Private Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles generatePlot.Click
ClearChart() 'Clear existing chart series
Try
'Doing a very long process here to plot the chart
Catch ex As Exception
MessageBox.Show(ErrorToString)
Exit Sub
End Try
'Save chart as an image
Chart1.SaveImage(specDataHelper.imageSave, System.Drawing.Imaging.ImageFormat.Bmp)
End Sub
在上面的函数中,如果图表区域不是空的,我想将其保存为图像。否则,我想跳过保存为图像部分
如何检查图表区域是否为空?我不确定该调查哪家酒店。来自@Esko的好建议。我检查了序列是否为空:
'Save chart as an image
If (Me.Chart1.Series("Result").Points.Count <> 0) Then
Chart1.SaveImage(specDataHelper.imageSave, System.Drawing.Imaging.ImageFormat.Bmp)
End If
而且,工作正常。在获取数据时,创建一个变量来保存信息,无论是否有数据,并将其用作保存的条件。@Esko。抢手货我检查了我的系列中的点是否为空