How to Create a MOSS 2007 VPC Image

Wonderful series of posts by Tony Zink outlining exactly what you need to do to set up Microsoft Office SharePoint Server 2007 on a Virtual PC with a SQL Server 2005 backend and full e-mail capabilities:

http://www.pptspaces.com/sharepointreporterblog/Lists/Posts/Post.aspx?ID=28

LINQ to SQL and the DataGridView control

A DataGridView control won't bind directly to an IEnumerable object, so two options are:

1. Create a BindingSource, set its DataSource to the IEnumerable object, then set the DataGridView.DataSource property to the BindingSource.

2. Bind the DataGridView.DataSource property to the IEnumerable object's ToList() method.

Thanks to Ken Tucker on Microsoft Forums for this tip.

How to resolve "__doPostBack is not defined" error

Thanks to Julien Pinquié:

When I ran across this, I found that I'd closed a <script> tag referring to an external .js file with /> notation instead of <script></script>; the <script> tag doesn't accept this notation for whatever reason.

Simple Port Scan

The following function will check to see if connectivity is enabled for a particular host on a particular port via TCP/IP:

Function ScanPort(ByVal strHost As String, ByVal intPort As Integer) As Boolean
    Dim aobjIPs() As System.Net.IPAddress = System.Net.Dns.GetHostEntry(strHost).AddressList
    If aobjIPs.Length > 0 Then
        Dim objEndpoint As New System.Net.IPEndPoint(aobjIPs(0), intPort)
        Using s As New System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp)
            Try
                s.Connect(objEndpoint)
                Return s.Connected
            Catch ex As Exception
                Return False
            End Try
        End Using
    Else
        Return False
    End If
End Function

JavaScript button disable with postback

When an ASP.NET server-side button is given client-side JavaScript code to execute when handling onclick, the button no longer posts back by default. However, there is a small piece of code you can add to the onclick attribute of the button to re-enable the postback behavior.

Adding this code in the Page_Load method will remove a server-side button's postback call:

btnConfirm.Attributes.Add("onclick", "Confirm_Click();")

But writing the code like this will reinstate the postback call:

btnConfirm.Attributes.Add("onclick", "Confirm_Click(); " + ClientScript.GetPostBackEventReference(btnConfirm, ""))

FileUpload control in an UpdatePanel

By nature, FileUpload controls require an entire page postback to submit the file contents, so they are explicitly excluded from support within an UpdatePanel...however, if you put the Submit button that performs the postback intended to upload the file into a PostbackTrigger, you can place your FileUpload control within the UpdatePanel.


<asp:UpdatePanel runat="server">
    <ContentTemplate>
        <asp:FileUpload runat="server" ID="fupTest" />
        <asp:Button runat="server" ID="btnSubmit" Text="Upload"/>
    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnSubmit" />
    </Triggers>
</asp:UpdatePanel>

Transactions and strongly typed TableAdapters

To do this, create a new class file containing a Partial Class declaration with the name of your table adapter. Add this code to the class:


Private _transaction As SqlTransaction

Private Property Transaction() As SqlTransaction
Get
Return Me._transaction
End Get
Set(ByVal Value As SqlTransaction)
Me._transaction = Value
End Set
End Property

Public Sub BeginTransaction()
' Open the connection, if needed
If Me.Connection.State <> ConnectionState.Open Then
Me.Connection.Open()
End If
' Create the transaction and assign it to the Transaction property
Me.Transaction = Me.Connection.BeginTransaction()
' Attach the transaction to the Adapters
For Each command As SqlCommand In Me.CommandCollection
command.Transaction = Me.Transaction
Next
Me.Adapter.InsertCommand.Transaction = Me.Transaction
Me.Adapter.UpdateCommand.Transaction = Me.Transaction
Me.Adapter.DeleteCommand.Transaction = Me.Transaction
End Sub

Public Sub CommitTransaction()
' Commit the transaction
Me.Transaction.Commit()
' Close the connection
Me.Connection.Close()
End Sub

Public Sub RollbackTransaction()
' Rollback the transaction
Me.Transaction.Rollback()
' Close the connection
Me.Connection.Close()
End Sub