VSTO Excel加載項中的獨立WPF表單無法保持焦點

Question

我正在創建用於Excel的VSTO插件，並且第一次嘗試可以工作，但是我對設計不滿意。 作為標准，VSTO僅處理Windows窗體。 我現在進入WPF，發現布局和動畫選項使用戶體驗更好。

現在，我發現可以將WPF項目添加到VSTO解決方案中，並以這種方式調用表單...太好了！

問題是當我加載表單時，我這樣做：

Dim NewForm as New NewForm
NewForm.Show()

這可以正常工作，並且可以打開表單，但是，如果我嘗試在文本框中鍵入內容，則表單會落在excel之后，並且文本會進入Excel中的活動單元格。

如果我做：

Dim NewForm as New NewForm
NewForm.ShowDialog()

它工作正常。 不幸的是，我不能讓表格成為我的申請的模態。 我該如何解決？

Answer 1

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

您會注意到ShowDialog（）方法已被替換

該類還使對話框看起來像Word VBA表單（我的客戶經常想要的東西）

我的dialog.xaml.cs類看起來像（和xaml匹配）：

public partial class myDialog : OfficeDialog

-編輯-

這是源代碼。 我一直有麻煩。 它偶爾會拖到應用程序后面（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);

}