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我正在为 Excel 创建一个 VSTO 插件，我的第一次尝试有效，但我对这个设计不满意。作为标准 VSTO 仅处理 Windows 窗体。我现在进入 WPF 并发现布局和动画选项可以提供更好的用户体验。

我现在发现我可以将 WPF 项目添加到 VSTO 解决方案并以这种方式调用表单......太棒了！

问题是当我加载表单时，我会这样做：

Dim NewForm as New NewForm
NewForm.Show()

这工作正常，并且表单打开，但是如果我尝试在文本框中输入，表单会落在 excel 后面，并且文本会进入 Excel 中的活动单元格。

如果我做：

Dim NewForm as New NewForm
NewForm.ShowDialog()

它工作正常。不幸的是，我不能让表单成为我的应用程序的模式。我怎样才能解决这个问题？

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1 回答 1

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我使用以下类： https ://dl.dropboxusercontent.com/u/62538279/Help/OfficeDialog.cs

您会注意到 ShowDialog() 方法已被替换

该类还使对话框看起来像 Word VBA 表单（我的客户经常想要的）

我的 dialog.xaml.cs 类看起来像（并且 xaml 匹配）：

public partial class myDialog : OfficeDialog

- 编辑 -

这是源代码。我一直有麻烦。它偶尔会落后于应用程序（很少）

http://stackoverflow.com/questions/40374059/why-does-my-modal-wpf-dialog-slip-behind-ms-word/40401198#40401198

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

public class OfficeDialog : Window
{

    [DllImport("user32.dll")]
    static extern int GetWindowLong(IntPtr hwnd, int index);
    [DllImport("user32.dll")]
    static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);
    [DllImport("user32.dll")]
    static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter, int x, int y, int width, int height, uint flags);
    [DllImport("user32.dll")]
    static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam, IntPtr lParam);

    const int GWL_EXSTYLE = -20;
    const int WS_EX_DLGMODALFRAME = 0x0001;
    const int SWP_NOSIZE = 0x0001;
    const int SWP_NOMOVE = 0x0002;
    const int SWP_NOZORDER = 0x0004;
    const int SWP_FRAMECHANGED = 0x0020;
    const uint WM_SETICON = 0x0080;
    const int ICON_SMALL = 0;
    const int ICON_BIG = 1;

    /// <summary>
    /// Sometimes get System.ComponentModel.Win32Exception: Invalid window handle
    /// I'm pretty sure that this is because Word is shit at handling windows and has an internal memory leak
    /// http://stackoverflow.com/questions/222649/winforms-issue-error-creating-window-handle
    /// I'm not sure why this error isn't trapped and logged by the try catch below. Somehow it bubbles up to the calling routine..
    /// </summary>
    public OfficeDialog()
    {
        this.ShowInTaskbar = false;
        //this.Topmost = true;

        //Uri uri = new Uri("PresentationFramework.Aero;V3.0.0.0;31bf3856ad364e35;component\\themes/aero.normalcolor.xaml", UriKind.Relative);
        //Uri uri = new Uri("PresentationFramework.Classic;V3.0.0.0;31bf3856ad364e35;component\\themes/classic.xaml", UriKind.Relative);
        //Resources.MergedDictionaries.Add(Application.LoadComponent(uri) as ResourceDictionary);

        //var helper = new WindowInteropHelper(this);
        //using (Process currentProcess = Process.GetCurrentProcess())
        //    helper.Owner = currentProcess.MainWindowHandle;
    }

    public new void ShowDialog()
    {
        try
        {
            var helper = new WindowInteropHelper(this);
            using (Process currentProcess = Process.GetCurrentProcess())
                helper.Owner = currentProcess.MainWindowHandle;
            base.ShowDialog();
        }
        catch (System.ComponentModel.Win32Exception ex)
        {
            Message.LogWarning(ex);
            //this.Topmost = true;
            var helper = new WindowInteropHelper(this);
            using (Process currentProcess = Process.GetCurrentProcess())
                helper.Owner = currentProcess.MainWindowHandle;
            base.ShowDialog();
        }
    }

    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);
        RemoveIcon(this);
        HideMinimizeAndMaximizeButtons(this);
        //using (Process currentProcess = Process.GetCurrentProcess())
        //    SetCentering(this, currentProcess.MainWindowHandle);
    }

    public static void HideMinimizeAndMaximizeButtons(Window window)
    {
        const int GWL_STYLE = -16;

        IntPtr hwnd = new WindowInteropHelper(window).Handle;
        long value = GetWindowLong(hwnd, GWL_STYLE);

        SetWindowLong(hwnd, GWL_STYLE, (int)(value & -131073 & -65537));
    }

    public static void RemoveIcon(Window w)
    {
        // Get this window's handle 
        IntPtr hwnd = new WindowInteropHelper(w).Handle;

        // Change the extended window style to not show a window icon
        int extendedStyle = OfficeDialog.GetWindowLong(hwnd, GWL_EXSTYLE);
        OfficeDialog.SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_DLGMODALFRAME);

        // reset the icon, both calls important
        OfficeDialog.SendMessage(hwnd, WM_SETICON, (IntPtr)ICON_SMALL, IntPtr.Zero);
        OfficeDialog.SendMessage(hwnd, WM_SETICON, (IntPtr)ICON_BIG, IntPtr.Zero);

        // Update the window's non-client area to reflect the changes
        OfficeDialog.SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
    }

    static void SetCentering(Window win, IntPtr ownerHandle)
    {
        bool isWindow = IsWindow(ownerHandle);
        if (!isWindow) //Don't try and centre the window if the ownerHandle is invalid.  To resolve issue with invalid window handle error
        {
            //Message.LogInfo(string.Format("ownerHandle IsWindow: {0}", isWindow));
            return;
        }
        //Show in center of owner if win form.
        if (ownerHandle.ToInt32() != 0)
        {
            var helper = new WindowInteropHelper(win);
            helper.Owner = ownerHandle;
            win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
        }
        else
            win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
    }

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool IsWindow(IntPtr hWnd);

}
于 2013-09-30T09:57:25.013 回答