Question

SQL Update Command in ASP.NET

Asked by: realtytech

I am writing an update command in ASP.NET with VB.  The code below is my SQL command.  

When I run this I get an error that states...

Exception Details: System.Data.SqlClient.SqlException: Invalid column name 'rattrap2'.

where rattrap2 is the "new" password that is coming from my textbox field.

Thanks guys...

    Dim cmd1 As New SqlCommand("UPDATE userid SET password=" & txtnewPasswordOne.text & " WHERE username='" & strUsername & "'", con1)

                                  
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Asked On
2009-11-06 at 10:31:54ID24878850
Topics

Programming for ASP.NET

,

SQL Server 2005

Participating Experts
2
Points
125
Comments
8

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Answers

 

by: arhamePosted on 2009-11-06 at 10:41:57ID: 25761790

Taking stuff from a textbox directly into your SQL command opens you up completely to a SQL injection and hackers... Try this:

Dim updateCommand As SqlCommand
            Dim strConnection As String = ConfigurationManager.ConnectionStrings("##YourConnectionString").ConnectionString
            Dim objConnection As New SqlConnection(strConnection)
            Dim str As String = "UPDATE userid SET password = @password WHERE username='" & strUsername & "'""
            updateCommand = New SqlCommand(Str, objConnection)
            Try
                objConnection.Open()
                updateCommand.Parameters.AddWithValue("password", txtnewPasswordOne.text)
                updateCommand.ExecuteNonQuery()
            Catch ex As Exception
                Response.Output.Write(ex.ToString())
            End Try
            objConnection.Close()
            objConnection.Dispose()
            objConnection = Nothing

                                              
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by: arhamePosted on 2009-11-06 at 10:42:29ID: 25761796

The only thing you should have to update is the ConnectionString to the named one in your webconfig file.

 

by: HainKurtPosted on 2009-11-06 at 10:43:03ID: 25761799

try this

    Dim cmd1 As New SqlCommand("UPDATE userid SET password='" & txtnewPasswordOne.text & "' WHERE username='" & strUsername & "'", con1)

 

by: HainKurtPosted on 2009-11-06 at 10:43:43ID: 25761811

you have to put ' around password, look my prv post...

 

by: arhamePosted on 2009-11-06 at 10:44:28ID: 25761820

Yeah that'll fix the problem HainKurt - but opens him up to others.  Teach a man to fish or give a man a fish.... :)

 

by: realtytechPosted on 2009-11-06 at 10:50:30ID: 31651163

Thanks guys and thanks for the SQL injection warning I plan on cleaning it up later as of right now i just need it to work quick and dirty.

 

by: HainKurtPosted on 2009-11-06 at 11:13:31ID: 25762131

I gave a fish :)

 

by: HainKurtPosted on 2009-11-06 at 11:16:27ID: 25762164

Bone Apetit...

20120131-EE-VQP-002

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