Not possible without iterating to build a new list. You can wrap the list in a container that implements IList. You can use LINQ to get a lazy evaluated version of IEnumerable<string> from an object list like this: var stringList = myList.OfType<string>();
Module == static class If you just want a class that you can’t inherit, use a NotInheritable class; but it won’t be static/Shared. You could mark all the methods, properties, and members as Shared, but that’s not strictly the same thing as a static class in C# since it’s not enforced by the compiler. If … Read more
@ewomack has a great answer for C#, unless you don’t need extra object values. In my case, I ended up using something similar to: @Html.ActionLink(“Delete”, “DeleteList”, “List”, new object { }, new { @class = “delete”})
Value vis-a-vis Reference Types Variables in C# are in 1 of 2 groups. Value types or Reference types. Types like int and DateTime are value types. In contrast, any class you create is a reference type. C# strings are also a reference type. Most things in the .NET framework are reference types. Parts of a … Read more
There is no shorthand for Visual Studio 2008 or prior for VB.NET. In Visual Studio 2010 and beyond, you can use the following shorthand: Public Property FirstName as String This will be handled as your short version in C# is – I think they call it “Auto Property” See also: Auto-Implemented Properties (Visual Basic)
You can use P/Invocation to be able to use WinAPI’s GetAsyncKeyState() function, then check that in a timer. <DllImport(“user32.dll”)> _ Public Shared Function GetAsyncKeyState(ByVal vKey As System.Windows.Forms.Keys) As Short End Function Const KeyDownBit As Integer = &H8000 Private Sub Timer1_Tick(sender As Object, e As System.EventArgs) Handles Timer1.Tick If (GetAsyncKeyState(Keys.LWin) And KeyDownBit) = KeyDownBit AndAlso (GetAsyncKeyState(Keys.O) … Read more
My.Settings is a feature that enables you to manage your application’s settings such as; the last location and size of a form, the last selected properties of controls, recently opened files, …etc. It’s not – as already commented above – a place to store and retrieve your objects’ data. Your data should be in a … Read more
For brevity, I’m using a fake root key. In practice, replace Hive_Key with HKEY_LOCAL_MACHINE for system default settings, or HKEY_CURRENT_USER for per-user settings. Either of these keys are allowed to exist, or both. If they both exist, the HKCU key takes precedence. To associate an extension with a file type, you need to set the … Read more
Assuming you want to convert the xml string value to a proper DateTime variable, Net has many methods for this: ‘ a date value in the string format specified: Dim xmlDate As String = “07/15/2014 7:07:33 AM” ‘ create a DATE variable from that string in a known format: Dim newDate As Date = DateTime.ParseExact(xmlDate, … Read more
COM Automation supports a default property, the property that has dispid 0. This is used in VB6 code to great effect, generating really compact code. A typical example is: rs!Customer = “foo” Which is syntax sugar for: rs.Fields.Item(“Customer”).Value = “foo” Three default properties being used here without being named in the original statement. The Recordset … Read more