F# 1 : F# WPF Code Behind Application with FsXaml Create a new F# WPF Code Behind Application.
Example
Create an F# console application.
Change the Output type of the application to Windows Application.
Add the FsXaml NuGet package.
Add these four source files, in the order listed here.
MainWindow.xaml
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="First Demo" Height="200" Width="300">
<Canvas>
<Button Name="btnTest" Content="Test" Canvas.Left="10" Canvas.Top="10" Height="28" Width="72"/>
</Canvas>
</Window>
MainWindow.xaml.fs
namespace FirstDemo
type MainWindowXaml = FsXaml.XAML<"MainWindow.xaml">
type MainWindow() as this =
inherit MainWindowXaml()
let whenLoaded _ =
()
let whenClosing _ =
()
let whenClosed _ =
()
let btnTestClick _ =
this.Title <- "Yup, it works!"
do
this.Loaded.Add whenLoaded
this.Closing.Add whenClosing
this.Closed.Add whenClosed
this.btnTest.Click.Add btnTestClick
App.xaml
<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Application.Resources>
</Application.Resources>
</Application>
App.xaml.fs
namespace FirstDemo
open System
type App = FsXaml.XAML<"App.xaml">
module Main =
[<STAThread; EntryPoint>]
let main _ =
let app = App()
let mainWindow = new MainWindow()
app.Run(mainWindow) // Returns application's exit code.
Delete the Program.fs file from the project.
Change the Build Action to Resource for the two xaml files.
Add a reference to the .NET assembly UIAutomationTypes.
Compile and run.
You can't use the designer to add event handlers, but that's not a problem at all. Simply add them manually in the code behind, like you see with the three handlers in this example, including the handler for the test button.
UPDATE: An alternative and probably more elegant way to add event handlers has been added to FsXaml. You can add the event handler in XAML, same as in C# but you have to do it manually, and then override the corresponding member that turns up in your F# type. I recommend this.
