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POHow to load large text files in AvalonEdit control inside custom WPF C# project
 

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  1. POHow to load large text files in AvalonEdit control inside custom WPF C# project
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    <p>We are developing a .Net 4.0 C# WPF Line-of-business app and need to show (readonly) large text files to the user. <code>TextBlock</code> as stated in SO is not an option and tried the suggested AvalonEdit control. Running the AvalonEdit.Sample standalone app can load a 4MB file with 8k lines in less than a second, but when embedding the AvalonEdit <code>TextEditor</code> into our WPF app spends 20 seconds, almost the same as the previous <code>TextBlock</code>.</p> <p>The UI is quite complex, with a splitter for tree-menu and forms. The form has several splitters to create resizable zones and one of them contains a tab control. One of the tab items has the <code>TextEditor</code> from AvalonEdit.</p> <p>XAML</p> <pre><code>&lt;avalonEdit:TextEditor Name="Tbx" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible" /&gt; </code></pre> <p>CS</p> <pre><code>public void ShowFile(string path) { Tbx.Text = string.Empty; ThreadPool.QueueUserWorkItem(o =&gt; { var lines = File.ReadAllLines(path).Join("\n"); Dispatcher.BeginInvoke(() =&gt; Tbx.Text = lineas); }); } </code></pre> <p>When loading the file, my laptop i7 4-core CPU usage is 33%.</p> <p>Any suggestion about the different behaviour of AvalonEdit <code>TextEditor</code> as standalone app and within a custom WPF app?</p> <p>How to load large files (10MB, 10k lines) with <code>TextEditor</code>?</p> <p><strong>UPDATE:</strong></p> <p>The Visual Tree:</p> <p><img src="https://i.stack.imgur.com/NyEGQ.png" alt="Visual tree"></p> <p>The properties of the <code>TextEditor</code>:</p> <p><img src="https://i.stack.imgur.com/tqott.png" alt="TextEditor properties"></p> <p>I removed a ScrollViewer that host the <code>TextEditor</code> as pointed, but same poor performance is achieved.</p> <p><strong>UPDATE 2:</strong> I moved the <code>TextEditor</code> to a new window to reduce the layout but still get poor performance.</p> <p>The new, simplified Visual Tree:</p> <p><img src="https://i.stack.imgur.com/cFKr8.png" alt="Visual Tree 2"></p> <p><code>Grid</code> column and row definition is <code>*</code>.</p> <p>The properties of the <code>TextEditor</code>:</p> <p><img src="https://i.stack.imgur.com/udKUa.png" alt="TextEditor properties"></p>
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    1. USDavid Oliván Ubieto
    1. USDavid Oliván Ubieto
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