Troy Mac
Oct 13th, 2000, 01:55 PM
Why am I getting a Type Mismatch error on this code on the first instance of Set rs = db.OpenRecordset(SQLString)?
Private Sub cmdFind_Click()
Dim db As Database
'This is the object that will hold the connection
'to our database
Dim rs As Recordset
'This is the object that will hold a set of
'records coming back from the database
Dim SQLString As String
'This is just to temporarily hold the SQL string
Set db = OpenDatabase("c:\Program Files\Microsoft Visual Studio\Nwind.mdb")
'This activates the database object, telling it
'to link to the Nwind.mdb database. Note that
'you may have to change this path depending on
'where Visual Basic has been installed on your PC.
SQLString = "SELECT Orders.CustomerID, " & _
"Count(Orders.OrderID) " & _
"AS NoOfOrders From Orders " & _
"GROUP BY Orders.CustomerID " & _
"HAVING (((Orders.CustomerID)='" & _
txtCustID.Text & "'))"
'This SQL statement was created in Access. It simply returns
'the number of orders for a particular customer using the
''Count' feature on the 'Total' line. If you'd like to use
'Count, but are a little unsure about it - search Access help -
'it's very simple!
Set rs = db.OpenRecordset(SQLString)
'This ties the recordset object with the database object.
'You're telling it to set the recordset object to whatever
'the "db.OpenRecordset" function returns. And that function
'will return a set of records according to the SQL statement
'you pass it.
If rs.BOF = True And rs.EOF = True Then
'Obviously the customer cannot be found in the
'orders table, so let's tell the user - and close
'the recordset/database connections
MsgBox ("Cannot find customer") ' - " & "txtCustID.Text & " - " & "in the Orders table!")
rs.Close
db.Close
Exit Sub
End If
txtTotalNumber.Text = rs.Fields("NoOfOrders")
'Simply throws the value in the 'NoOfOrders' field
'from the Recordset, direct into the txtTotalNumber
'text box
SQLString = "SELECT Orders.CustomerID, " & _
"Last(Orders.OrderDate) " & _
"AS LastOrderDate From Orders " & _
"GROUP BY Orders.CustomerID " & _
"HAVING (((Orders.CustomerID)='" & txtCustID.Text & "'))"
'We've already figured out the number of orders - so
'this is the SQL statement that finds out the last order
'date
Set rs = db.OpenRecordset(SQLString)
'This is the second time we've seen this statement. Here,
'it says the Recordset object to hold the records
'from our new SQLString statement
txtLastDate.Text = rs.Fields("LastOrderDate")
'Here, we're taking the information from the 'LastOrderDate'
'field and placing it in the txtLastDate text box
txtLastDate.Text = Format(txtLastDate.Text, "Long Date")
'Now we're just formatting to make it look pretty
rs.Close
'Close the Recordset
db.Close
'Close the Database
End Sub
Private Sub cmdFind_Click()
Dim db As Database
'This is the object that will hold the connection
'to our database
Dim rs As Recordset
'This is the object that will hold a set of
'records coming back from the database
Dim SQLString As String
'This is just to temporarily hold the SQL string
Set db = OpenDatabase("c:\Program Files\Microsoft Visual Studio\Nwind.mdb")
'This activates the database object, telling it
'to link to the Nwind.mdb database. Note that
'you may have to change this path depending on
'where Visual Basic has been installed on your PC.
SQLString = "SELECT Orders.CustomerID, " & _
"Count(Orders.OrderID) " & _
"AS NoOfOrders From Orders " & _
"GROUP BY Orders.CustomerID " & _
"HAVING (((Orders.CustomerID)='" & _
txtCustID.Text & "'))"
'This SQL statement was created in Access. It simply returns
'the number of orders for a particular customer using the
''Count' feature on the 'Total' line. If you'd like to use
'Count, but are a little unsure about it - search Access help -
'it's very simple!
Set rs = db.OpenRecordset(SQLString)
'This ties the recordset object with the database object.
'You're telling it to set the recordset object to whatever
'the "db.OpenRecordset" function returns. And that function
'will return a set of records according to the SQL statement
'you pass it.
If rs.BOF = True And rs.EOF = True Then
'Obviously the customer cannot be found in the
'orders table, so let's tell the user - and close
'the recordset/database connections
MsgBox ("Cannot find customer") ' - " & "txtCustID.Text & " - " & "in the Orders table!")
rs.Close
db.Close
Exit Sub
End If
txtTotalNumber.Text = rs.Fields("NoOfOrders")
'Simply throws the value in the 'NoOfOrders' field
'from the Recordset, direct into the txtTotalNumber
'text box
SQLString = "SELECT Orders.CustomerID, " & _
"Last(Orders.OrderDate) " & _
"AS LastOrderDate From Orders " & _
"GROUP BY Orders.CustomerID " & _
"HAVING (((Orders.CustomerID)='" & txtCustID.Text & "'))"
'We've already figured out the number of orders - so
'this is the SQL statement that finds out the last order
'date
Set rs = db.OpenRecordset(SQLString)
'This is the second time we've seen this statement. Here,
'it says the Recordset object to hold the records
'from our new SQLString statement
txtLastDate.Text = rs.Fields("LastOrderDate")
'Here, we're taking the information from the 'LastOrderDate'
'field and placing it in the txtLastDate text box
txtLastDate.Text = Format(txtLastDate.Text, "Long Date")
'Now we're just formatting to make it look pretty
rs.Close
'Close the Recordset
db.Close
'Close the Database
End Sub