ASP.NET code not working in VisualStudio.NET
Created the following code in VS.NET modifying a block of code from a reference book wherein the author was using a simple text editor.
Sub InsertRecord()
Dim conClasf As OleDb.OleDbConnection
Dim cmdClasf As New OleDb.OleDbCommand
Dim strClasf As String
Dim strSQL As String
Dim intRowsAff As Integer
'-----------------
lblErrMsg.Text = ""
lblRecsAff.Text = ""
'-----------------
strClasf = "Provider = Microsoft.Jet.4.0.;" & _
"Data = " & _
Server.MapPath("classified.mdb") & ";"
conClasf = New OleDb.OleDbConnection(strClasf)
conClasf.Open() ' ---here..
'-----------------
Randomize()
strSQL = "INSERT INTO members (" & _
"memberid, " & _
"firstname, " & _
"lastname, " & _
"[password], " & _
"confnumber, " & _
"confirmed " & _
") VALUES ('" & _
Replace(txtMemberid.Value, "'", "''") & _
"', '" & _
Replace(txtFirstname.Value, "'", "''") & _
"', '" & _
Replace(txtLastname.Value, "'", "''") & _
"', '" & _
Replace(txtPassword.Value, "'", "''") & _
"', " & _
CLng(Rnd() * 9000000) + 1000000 & _
", " & _
"False)"
'---------------------
cmdClasf = New OleDb.OleDbCommand(strSQL, conClasf)
'---------------------
Try
intRowsAff = cmdClasf.ExecuteNonQuery()
Catch ex As Exception
lblErrMsg.Text = ex.Message
End Try
' ----------------------
lblRecsAff.Text = intRowsAff & " record(s) inserted"
conClasf.Close()
End Sub
When run, VS.NET found no problems. When Data was entered and submit button hit, the browser debugger came back with:
Exception Details: System.Data.OleDb.OleDbException: No error information available: REGDB_E_CLASSNOTREG(0x80040154).
Source Error:
Line 49: Server.MapPath("classified.mdb") & ";"
Line 50: conClasf = New OleDb.OleDbConnection(strClasf)
error--->Line 51: conClasf.Open()
Line 52: '-----------------
Line 53: Randomize()
What was wrong with conClasf.Open()
VS.NET demands that Open & Close have ().
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TheoKron
4/30/2004 10:57:24 PM
asp.net.getting-started
91979 articles. 
4 followers.
2 Replies
386 Views
Your database drivers are probably not up-to-date. You can try installing the latest version of MDAC and see what happens.
Now for the mean stuff. If you got this code from a reference book, well, I don't know who wrote this book, but you should probably find another one. This code seems to assume that replacing quotes with double quotes protects it from Sql Injection Attacks. Well, it's wrong, because there is a variety of methods to work around this.
The right way of injecting values into a sql query is to use Parameter objects.
Search this forum for "Sql injection attack" for more details.
Bertrand
----
This posting is provided "AS IS" with no warranties, and confers no rights.
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bleroy
5/1/2004 12:13:41 AM
Thanks bleroy,
Drivers are up to date; the original code worked in web matrix. I had to adjust it for VS.NET. When it ran, the browser had no problem with the initial .aspx page. The problem arose when I hit the submit button. At this moment an exception was thrown on the conClasf.Open() line.
This line is the teh same as in original code except for the fact that VS.NET insists on puting () at the end of it.
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TheoKron
5/1/2004 3:10:27 AM
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