September 15th we are hosting another Software Developer Event. This SDE is focused on WEB development so if you are in the Netherlands and even remotely interested in WEB development you really should go.
And its not just for .NET developers either, Visual FoxPro, Delphi and Visual Objects developers are welcome too. Of course Java, Ruby and all others too be we don’t have anything special for them L
The session (in Dutch)
Overzicht sprekers en sessies
| Delphi
| C#
| Visual Basic.NET
| DotNetNuke
| FoxPro
| Visual Objects
|
| 8:30 | Registratie / Ontvangst
|
| 9:00 | Delphi 2006 en (Custom) DBWeb Controls
Bob Swart
| Hoe gebruik je het web als infrastructuur voor je applicaties?
Peter van Ooijen
| Wie is er bang van CASper, het lieve spookje?
Marcel Peereboom
| DotNetNuke
and Ajax
Stefan Kamphuis
| Working interactively with Visual FoxPro
Rainer Becker
| DBF Access in a .NET World
Ginny Caughey
|
| 10:15 | Pauze - 30 min.
|
| 10:45 | Framework ontwikkeling voor database toepassingen
Patrick Barel
| BBQ Web: Custom modules in Community Server 2.0
Dennis Vroegop
| RSS Lifecycle
Hannes Preishuber
| How to make
a news site with DNN
Peter Schotman
| Using Foxpro Data and procedures in classic ASP
Ronald Jansen
| Van VO naar Vulcan. Dat is Logisch
Robert v/d Hulst
|
| 12:00 | Lunch - 60 min.
|
| 13:00 | ASP.NET voor Delphi programmeurs
Jeroen Pluimers
| WCF Security
Erik van de Ven
| The unknown side of Gridview
Hannes Preishuber
| Module Development
Process
Erik van Ballegoij
| Whats New in SQL in Visual FoxPro 9.0
Rainer Becker
| Vulcan.NET Migration Strategies
Ginny Caughey
|
| 14:15 | Pauze - 15 min.
|
| 14:30 | Web applications with ASP.NET and IntraWeb (including ECO support)
Hadi Hariri
| ASP.NET 2.0 caching
Alex Thissen
| Exception management voor Web & Win apps in .Net 2.0
Mark Vroom
| Developing Secure DotNetNuke modules
Cathal Connolly
| Using Foxpro Data and procedures in ASP.NET 2.0
Gerben Kessen
| Windows messaging en communicatie tussen applicaties
Frans de Wit
|
| 15:45 | Pauze - 30 min.
|
| 16:15 | Indy for DOT.NET & Win 32
Hadi Hariri
| Building AJAX-style Web Apps with Atlas
Raimond Brookman
| Nieuw in ASP.NET 2.0
Thomas Huijer
| Using DotNetNuke to rapidly develop rich components
Cathal Connolly
| SOA with Webservices in Visual FoxPro
Rainer Becker
| Wat is er nieuw in Visual Objects 2.8
Robert v/d Hulst
|
| 17:30 | Einde
|
Hope to see you there!
One of the controls just about every developer seems to create is a mover. Basically a mover consists of two list boxes, the left one containing the available items, the one on the right containing the selected items. Selecting one or more items and clicking a button, or drag and drop sometimes, selects or deselects the items.
Now there are several ways of doing this but frequently people are moving items between list box Items collection. Now this works but there is a far easier way to handle this. Create a DataTable with the items in question. Add two columns, the first is names Selected and of type Boolean, the second is named Order and of type Integer.
The second is actually only needed if you want new items to appear at the bottom of the list, leaving it out results in a fixed order of items no matter in what order they where selected.
Now create a DataView for each of the two list boxes passing in the DataTable in the constructor. Set the RowFilter of the available list to Selected = false and for the selected to Selected = true. Set the Sort property to Order of required and use these two as the DataSource for the two list boxes.
Now all you have to do is update the Selected and Order columns when the user selects/deselects one of the items.
Simple and quick, just the way I like it J
PublicClass Form1
PrivateSub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesMyBase.Load
Dim dt AsNew DataTable
dt.Columns.Add("Description", GetType(String))
dt.Columns.Add("Selected", GetType(Boolean))
dt.Columns.Add("Order", GetType(Integer))
For i AsInteger = 1 To 10
dt.Rows.Add(NewObject() {i.ToString(), False, i})
Next
Dim dv As DataView
dv = New DataView(dt)
dv.RowFilter = "Selected = false"
dv.Sort = "Order"
lstAvailable.DataSource = dv
lstAvailable.DisplayMember = "Description"
dv = New DataView(dt)
dv.RowFilter = "Selected = true"
dv.Sort = "Order"
lstSelected.DataSource = dv
lstSelected.DisplayMember = "Description"
EndSub
PrivateSub cmdMoveRight_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdMoveRight.Click
MoveSelected(lstAvailable, lstSelected)
EndSub
PrivateSub cmdMoveLeft_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdMoveLeft.Click
MoveSelected(lstSelected, lstAvailable)
EndSub
PrivateSub MoveSelected(ByVal source As ListBox, ByVal target As ListBox)
Dim selected AsNew List(Of DataRow)()
ForEach item AsObjectIn source.SelectedItems
selected.Add(CType(item, DataRowView).Row)
Next
ForEach row As DataRow In selected
row("Selected") = NotCBool(row("Selected"))
row("Order") = Environment.TickCount
Next
EndSub
EndClass
Looking for a compression library that gets around? LZO is a fast compression library that was actually uses on the NASA rovers Spirit and Opportunity. Michael Link created a .NET wrapper class so using it is a breeze. The following is the sample application listed on the LZO.NET home page:
// Create the compressor object
LZOCompressor lzo = newLZOCompressor();
// Build a quite redundant string
StringBuilder sb = newStringBuilder();
for (int i = 0; i < 10000; i++)
{
sb.Append("LZO.NET");
}
string str = sb.ToString();
Console.WriteLine("Original-Length: " + str.Length);
// Now compress the 70000 byte string to something much smaller
byte[] compressed = lzo.Compress(Encoding.Default.GetBytes(str));
Console.WriteLine("Compressed-Length: " + compressed.Length);
// Decompress the string to its original content
string str2 = Encoding.Default.GetString(lzo.Decompress(compressed));
Console.WriteLine("Decompressed-Length: " + str2.Length);
Console.WriteLine("Equality: " + str.Equals(str2));
Even though no mention is made of .NET 2.0 it still works just as advertised.
NDoc was a great tool to generate documentation for the code I wrote. Unfortunately its been very quite around NDoc for a while but now Kevin Downs has decided to stop the project altogether. A shame but given the reasons he lists quite understandable.
Now that's a surprise as I wasn't expecting a 2003 SP anymore. Now if they would only do a 2005 SP I would be a happy camper :-)