DevExpress controls for WPF load time

When i use DevExpress controls for WPF-load time of the window on which they are declared-increases. But on second access-it loads fast. Isnt there a way to preload all of needed dll/themes on program startup (let it took 5-10 secs!), but load them fast in overall program? I've searched a bit, found something like this:

    private static void RunTypeInitializers(Assembly a)
    {
        Type[] types = a.GetExportedTypes();
        for (int i = 0; i < types.Length; i++)
        {
            RuntimeHelpers.RunClassConstructor(types[i].TypeHandle);
        }
    }

    private static void PreloadControls()
    {
        ThemeManager.ApplicationThemeName = Theme.Office2007BlueName;

        ThemeManager.SetThemeName(new TextEdit(), Theme.Office2007BlueName);
        ThemeManager.SetThemeName(new TreeListControl(), Theme.Office2007BlueName);

        RunTypeInitializers(Assembly.GetAssembly(typeof(TextEdit)));
        RunTypeInitializers(Assembly.GetAssembly(typeof(TreeListControl)));
        RunTypeInitializers(Assembly.GetAssembly(typeof(BarManager)));

        //GC.KeepAlive(typeof(TreeListControl));
        //GC.KeepAlive(typeof(BarManager));
        //GC.KeepAlive(typeof(TreeListView));
        //GC.KeepAlive(typeof(DevExpress.Xpf.Editors.Settings.MemoEditSettings));
        //GC.KeepAlive(typeof(DevExpress.Xpf.Editors.Settings.TextEditSettings));
    }

But non of that helps. First load is still long.
wpf performance controls devexpress
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asked Jun 1 at 9:34
0x49D1
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Here such question was answered: devexpress.com/Support/Center/p/B201967.aspx – 0x49D1 Jun 29 at 6:57
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To resolve this issue, I suggest that you ngen our assemblies and use the DXSplashWindow (11.1) or create a similar window manually and show it when the main form opens for the first time.

This slowdown is caused by JIT and theme loading.

The RunTypeInitializers simply calls an object constructor. WPF themes are not loaded at this moment because this happens only when a control is about to be shown and the visual tree is generated.

A possible solution to this problem is to create an invisible window which will contain all our controls, then show and hide it. However, I do not like this approach. In my opinion, it is better to show a splash window.
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answered Jun 2 at 9:01
DevExpress Team
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Thank you for the answer. Does DXSplashWindow preload WPF themes when its showed, or i must create own splash window with calls to DX WPF controls to show them first time? – 0x49D1 Jun 2 at 12:52
    
I have ngen-ed my assemblies and started application again. When i open windows with devexpress controls-it takes lot of time again..So i think that i experience here the problem with WPF themes you described. I'll try invisible window, until you answer about Devexpress's native splash. – 0x49D1 Jun 2 at 13:03
    
Made the following: added own splashscreen with XtraGrid on it. I show that screen on application start and close after it loads. Still no performance improvements when opening other windows with devexpress components-the first of them starts a bit slowly, but after- even if i close the one-others load really fast! – 0x49D1 Jun 2 at 13:18
    
The DXSplashWindow cannot improve the application performance. This is just a convenient way to ask the end-user to wait during a long operation. – DevExpress Team Jun 3 at 8:03

转载于:https://www.cnblogs.com/luoyaoquan/archive/2011/07/30/2121858.html