[英]Excel VBA User-Defined Function to query an Access Database
I have an Access 365 database that has Invoice Numbers, Due Dates, and Amounts Due.我有一个 Access 365 数据库,其中包含发票编号、到期日和到期金额。 I'm trying to create an Excel UDF, whereby I input the Due Date and Invoice Number, and the function queries the database and returns the Amount Due.
我正在尝试创建一个 Excel UDF,由此我输入到期日期和发票编号,function 查询数据库并返回到期金额。
The formula result is #Value and there's no compiler error, though there appears to be an error when it attempts to open the record set (I set up a error message box for this action).公式结果是#Value 并且没有编译器错误,尽管在尝试打开记录集时似乎出现了错误(我为此操作设置了一个错误消息框)。 Perhaps there's an issue with my SQL?
也许我的 SQL 有问题? I'd appreciate any assistance with this matter.
对于此事,我将不胜感激。
I've found several discussions of similar topic, but I've been unable to get this code to work.我发现了几个类似主题的讨论,但我一直无法让这段代码工作。 I'd appreciate any assistance with this matter.
对于此事,我将不胜感激。
https://www.mrexcel.com/board/threads/need-help-creating-user-defined-functions-in-excel-to-query-from-a-database.943894/ https://www.mrexcel.com/board/threads/need-help-creating-user-defined-functions-in-excel-to-query-from-a-database.943894/
Here's the code:这是代码:
Function CLLData(inpDate As Long, inpInvoiceNum As String)
Dim conn As Object
Dim rs As Object
Dim AccessFilePath As String
Dim SqlQuery As String
Dim sConnect As String
'Disable screen flickering.
Application.ScreenUpdating = False
'Specify the file path of the accdb file.
AccessFilePath = ThisWorkbook.Path & "\" & "CRDD.accdb"
'Create the connection string.
sConnect = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & AccessFilePath
On Error Resume Next
'Create the Connection object.
Set conn = CreateObject("ADODB.Connection")
'Check if the object was created.
If Err.Number <> 0 Then
MsgBox "Connection was not created!", vbCritical, "Connection Error"
'Exit Sub
End If
On Error GoTo 0
On Error Resume Next
'Open the connection.
conn.Open sConnect
'Check if the object was created.
If Err.Number <> 0 Then
MsgBox "Connection was not opened!", vbCritical, "Connection Open Error"
'Exit Sub
End If
On Error GoTo 0
'SQL statement to retrieve the data from the table.
SqlQuery = "SELECT [Value] FROM tblRawCallData WHERE (([DueDate] = '" & inpDate & "') AND ([Invoice] = '" & inpInvoiceNum & "'));"
On Error Resume Next
'Create the ADODB recordset object
Set rs = CreateObject("ADODB.Recordset")
'Check if the object was created.
If Err.Number <> 0 Then
Set rs = Nothing
Set conn = Nothing
MsgBox "Recordset was not created!", vbCritical, "Recordset Error"
'Exit Sub
End If
On Error GoTo 0
On Error Resume Next
'Open the recordset.
rs.Open SqlQuery, conn
'Check if the recordset was opened.
If Err.Number <> 0 Then
Set rs = Nothing
Set conn = Nothing
MsgBox "Recordset was not opened!", vbCritical, "Recordset open error"
'Exit Sub
End If
On Error GoTo 0
' Check there is data.
If Not rs.EOF Then
' Transfer result.
CLLData = rs!Value
MsgBox "Records: ", vbCritical, "Records"
' Close the recordset
Else
'Not found; return #N/A! error
CLLData = CVErr(xlErrNA)
MsgBox "No records in recordset!", vbCritical, "No Records"
End If
rs.Close
' Clean up
If CBool(conn.State And adStateOpen) Then conn.Close
Set conn = Nothing
Set rs = Nothing
'Enable the screen.
Application.ScreenUpdating = True
End Function
You need two or three corrections, as date values always should be handled as DateTime, and your invoice number most likely is numeric:您需要两个或三个更正,因为日期值始终应作为 DateTime 处理,并且您的发票编号很可能是数字:
Function CLLData(inpDate As Date, inpInvoiceNum As String)
' <snip>
'SQL statement to retrieve the data from the table.
SqlQuery = "SELECT [Value] FROM tblRawCallData WHERE (([DueDate] = #" & Format(inpDate, "yyyy\/mm\/dd") & "#) AND ([Invoice] = " & inpInvoiceNum & "));"
Edit for numeric "date" and alpha-numeric invoice:编辑数字“日期”和字母数字发票:
SqlQuery = "SELECT [Value] FROM tblRawCallData WHERE (([DueDate] = #" & Format(inpDate, "@@@@\/@@\/@@") & "#) AND ([Invoice] = '" & inpInvoiceNum & "'));"
Seems like your function could be significantly less complex.似乎您的 function 可能不那么复杂。
Comment out the error handler until you get it working when called from a Sub.注释掉错误处理程序,直到从 Sub 调用时它可以工作。
Function CLLData(inpDate As Long, inpInvoiceNum As String)
Dim conn As Object
Dim rs As Object
Dim AccessFilePath As String
Dim SqlQuery As String
Dim sConnect As String
AccessFilePath = ThisWorkbook.path & "\" & "CRDD.accdb"
sConnect = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & AccessFilePath
On Error GoTo haveError
Set conn = CreateObject("ADODB.Connection")
conn.Open sConnect
SqlQuery = "SELECT [Value] FROM tblRawCallData WHERE [DueDate] = " & inpDate & _
" AND [Invoice] = '" & inpInvoiceNum & "'"
Set rs = CreateObject("ADODB.Recordset")
rs.Open SqlQuery, conn
If Not rs.EOF Then
CLLData = rs.Fields("Value").Value
Else
CLLData = CVErr(xlErrNA)
End If
rs.Close
Exit Function
haveError:
CLLData = "Error:" & Err.Description
End Function
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