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我要查看该数据的图表在我的数据库 我想这个代码,但我得到一个错误信息查看在VB利用访问数据库中的数据图表
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Chart1.Series.Add("Total number of Orders for each Company")
Dim Conn As OleDbConnection = New OleDbConnection
Dim provider = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source ="
Dim dataFile = "F:\College Files\Co-op Files\Aramco Project\Application\OrdersApplication\OrdersApplication\Database.accdb"
Conn.ConnectionString = provider & dataFile
Conn.Open()
Dim cmd As OleDbCommand = New OleDbCommand("SELECT [CompanyID], (SELECT COUNT(QuantityRequired) FROM Order_Details) FROM [Orders] ", Conn)
Dim dr As OleDbDataReader = cmd.ExecuteReader
While dr.Read
Chart1.Series("Total number of Orders for each Company").Points.AddY(dr("CompanyID").ToString, dr("QuantityRequired").ToString)
End While
dr.Close()
cmd.Dispose()
End Sub
错误消息说QuantityRequired在此行的附加信息
Chart1.Series("Total number of Orders for each Company").Points.AddY(dr("CompanyID").ToString, dr("QuantityRequired").ToString)
当我删除指望它显示出来,但我需要它来计算每家公司ID
谢谢你的工作,但结果是错误的图表我不知道为什么 –
我想你需要过滤订单ID。请参阅编辑。 – Gustav
非常感谢 –