Using ASP.net 1.1
2 QUESTIONS:
1. Why do my write commands not work?
2. This file successfully makes changes in the database record. There
surely is some simple code I could add that would *add* records to this
database. Who can tell me?
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="Syst em.Data.Oledb" %>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArg s)
Dim DBConnection As OledbConnection
DBConnection = New OledbConnection ("Provider=Micr osoft.Jet.Oledb .4.0;" & _
"Data Source=C:\Inetp ub\wwwroot\app_ data\Acc.mdb" )
DBConnection.Op en()
Dim DBCommand As OledbCommand
DBCommand = New OledbCommand("S ELECT * FROM table1, Acc")
Dim SQLString AS String
SQLString = "UPDATE Table1 SET TheEmpName='POO OOO' WHERE TheDate='6/14/07'"
DBCommand = New OleDBCommand(SQ LString, DBConnection)
DBCommand.Execu teNonquery()
Dim DBReader AS OledbDatareader
DBReader = DBCommand.Execu teReader()
While DBReader.Read()
Response.Write( DBReader("TheDa te"))
Response.Write( DBReader("TheEm pName"))
End while
' MyDataGrid.Data Source = DBReader
'MyDataGrid.Dat aBind()
DBReader.Close( )
DBConnection.Cl ose()
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:DataGrid id="MyDataGrid " runat="server"/>
</form>
</body>
</html>
Jul 13 '07
14 1613
Yes, I got an error, so I put Dim TheEmpName as String = EmpName.Text, etc.,
which makes the names in the table the same as the variable names. It
works, but will it be a problem?
Thanks
"Mark Rae [MVP]" <ma**@markNOSPA Mrae.netwrote in message
news:OH******** ******@TK2MSFTN GP04.phx.gbl...
"Mark Rae [MVP]" <ma**@markNOSPA Mrae.netwrote in message
news:Og******** ******@TK2MSFTN GP06.phx.gbl...
>Dim EmpName as String = EmpName.Text Dim DateOfAccident as string = DateOfAccident. Text Dim NotifyDate as string = NotifyDate.Text
Actually, that might cause errors because the string variables have the
same names as the webcontrols...
Dim SQLString AS String
Dim strEmpName As String = EmpName.Text
Dim strDateOfAccide nt As String = DateOfAccident. Text
Dim strNotifyDate As String = NotifyDate.Text
SQLString = "INSERT INTO Table1(TheEmpNa me, TheDate,
TheNotifyDate)V ALUES('"+ strEmpName+"',' "+ strDateOfAccide nt+"','"+
strNotifyDate+" ')"
--
Mark Rae
ASP.NET MVP http://www.markrae.net
"dancer" <da****@microso ft.comwrote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
Now - other question - I have 47 fields. Do I have to code '"+field1+"' ,
etc. 47 TIMES?!!
Yes.
Is there not a way to say INSERT INTO Table 1 [all] VALUE [all] in some
form?
No.
SURELY there is a way.
You could play about with generics and dictionaries and goodness knows what
but, at the end of the day, you can't really get away from the fact that
you've to send your database a piece of SQL, so you may as well just build
it...
Also, I have seen
With Cmd Parameters
.Add(New OleDbParameter( "@field1",
frmfield1.text) )
etc.
What is the difference in that and INSERT?
That's parameterisatio n - a much safer way of constructing database writes
which helps to eliminate SQL Injection. You would be well advised to adopt
this method.
--
Mark Rae
ASP.NET MVP http://www.markrae.net
"dancer" <da****@microso ft.comwrote in message
news:uW******** ******@TK2MSFTN GP04.phx.gbl...
Yes, I got an error, so I put Dim TheEmpName as String = EmpName.Text,
etc., which makes the names in the table the same as the variable names.
It works, but will it be a problem?
No.
--
Mark Rae
ASP.NET MVP http://www.markrae.net
RE: Cmd parameters Oh I would like to try that. But every time I try I get
all kinds of errors.
What does the @ mean? Do you have to declare @something or does the
compiler understand the @ as something special?
("@something " , frmsomething.te xt))
Could you define the above?
By injection you mean the user adding an ' in the data?
Thank you very much.
"Mark Rae [MVP]" <ma**@markNOSPA Mrae.netwrote in message
news:uU******** ******@TK2MSFTN GP05.phx.gbl...
"dancer" <da****@microso ft.comwrote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
>Now - other question - I have 47 fields. Do I have to code '"+field1+"' , etc. 47 TIMES?!!
Yes.
>Is there not a way to say INSERT INTO Table 1 [all] VALUE [all] in some form?
No.
>SURELY there is a way.
You could play about with generics and dictionaries and goodness knows
what but, at the end of the day, you can't really get away from the fact
that you've to send your database a piece of SQL, so you may as well just
build it...
>Also, I have seen With Cmd Parameters .Add(New OleDbParameter( "@field1", frmfield1.text )) etc. What is the difference in that and INSERT?
That's parameterisatio n - a much safer way of constructing database writes
which helps to eliminate SQL Injection. You would be well advised to adopt
this method.
--
Mark Rae
ASP.NET MVP http://www.markrae.net This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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