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POF# WPF events: "Block following this 'let' is unfinished. Expect an expression"
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  1. POF# WPF events: "Block following this 'let' is unfinished. Expect an expression"
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    copied!<p>This is driving me nuts. I am looking <a href="http://msdn.microsoft.com/en-us/library/vstudio/dd233229.aspx" rel="nofollow">here</a> at Microsoft's function examples. I can't see what I am doing wrong.</p> <p>So, I am trying to use F# with WPF, I found a working online project template for it. <a href="http://visualstudiogallery.msdn.microsoft.com/e0907c99-bb04-4eb8-9692-9333d5ff4399" rel="nofollow">Here it is</a> .I was about to get started. Unfortunately, the designer does not work for generating events in the F# code by double clicking an element like it does in C#. But oh well, I can set what the Click does anyway. I decided I would do it all manually. </p> <p>Here is my flawed attempt:</p> <pre><code>module MainApp open System open System.Windows open System.Windows.Controls open FSharpx let mutable doc = "" type MainWindow = XAML&lt;"MainWindow.xaml"&gt; let loadWindow() = let window = MainWindow() // Your awesome code code here and you have strongly typed access to the XAML via "window" window.Root let make (sender:Object, e:RoutedEventArgs) = doc&lt;- doc +"&lt;?xml version=\"1.0\" standalone=\"no\"?&gt;" 0 [&lt;STAThread&gt;] (new Application()).Run(loadWindow()) |&gt; ignore </code></pre> <p>In any event, It does not like the line with let make on it. It gives me this error:</p> <pre><code>Block following this 'let' is unfinished. Expect an expression </code></pre> <p>And yet, clearly I read on the MSDN</p> <pre><code> The compiler uses the final expression in a function body to determine the return value and type </code></pre> <p>So, it has a return, how is it an unfinished expression?</p>
 

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