添加项目文件。

DotNet.RevitUI/Extension/WindowExtension.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Windows;
+
+namespace DotNet.RevitUI.MVVM.Extension
+{
+    public static class WindowExtension
+    {
+        /// <summary>
+        /// 非模态显示窗体，并指定此窗体的宿主窗体.
+        /// </summary>
+        /// <param name="main">The main.</param>
+        /// <param name="parent">The parent.</param>
+        public static void Show(this Window main, IntPtr parent)
+        {
+            if (parent == IntPtr.Zero)
+            {
+                parent = Process.GetCurrentProcess().MainWindowHandle;
+            }
+
+            var mainHelper = new System.Windows.Interop.WindowInteropHelper(main)
+            {
+                Owner = parent
+            };
+
+            // self-adaption
+            if (Math.Abs(PrimaryScreen.ScaleX - 1.0) >= 1e-7)
+            {
+                main.Width = main.Width * PrimaryScreen.ScaleX;
+                main.Height = main.Height * PrimaryScreen.ScaleX;
+            }
+
+            main.Show();
+        }
+
+        /// <summary>
+        /// 模态显示窗体，并指定此窗体的宿主窗体.
+        /// </summary>
+        public static void ShowDialog(this Window main, IntPtr parent)
+        {
+            if (parent == IntPtr.Zero)
+            {
+                parent = Process.GetCurrentProcess().MainWindowHandle;
+            }
+
+            var mainHelper = new System.Windows.Interop.WindowInteropHelper(main)
+            {
+                Owner = parent
+            };
+
+            // self-adaption
+            if (Math.Abs(PrimaryScreen.ScaleX - 1.0) >= 1e-7)
+            {
+                main.Width = main.Width * PrimaryScreen.ScaleX;
+                main.Height = main.Height * PrimaryScreen.ScaleX;
+            }
+
+            main.ShowDialog();
+        }
+
+        /// <summary>
+        /// 获取WPF窗口句柄.
+        /// </summary>
+        /// <param name="main">The main.</param>
+        /// <returns></returns>
+        public static IntPtr GetHandle(this Window main)
+        {
+            var helper = new System.Windows.Interop.WindowInteropHelper(main);
+
+#if !NET35
+            if(helper.Handle==IntPtr.Zero)
+            {
+               return helper.EnsureHandle();
+            }
+#endif
+            return helper.Handle;
+        }
+    }
+
+     class PrimaryScreen
+    {
+        #region Win32 API  
+        [DllImport("user32.dll")]
+        static extern IntPtr GetDC(IntPtr ptr);
+
+        [DllImport("gdi32.dll")]
+        static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
+
+        [DllImport("user32.dll", EntryPoint = "ReleaseDC")]
+        static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDc);
+
+        #endregion
+
+        #region DeviceCaps常量  
+        const int HORZRES = 8;
+        const int VERTRES = 10;
+        const int LOGPIXELSX = 88;
+        const int LOGPIXELSY = 90;
+        const int DESKTOPVERTRES = 117;
+        const int DESKTOPHORZRES = 118;
+        #endregion
+
+        #region 属性  
+        /// <summary>  
+        /// 获取屏幕分辨率当前物理大小  
+        /// </summary>  
+        public static Size WorkingArea
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var size = new Size
+                {
+                    Width = GetDeviceCaps(hdc, HORZRES),
+                    Height = GetDeviceCaps(hdc, VERTRES)
+                };
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return size;
+            }
+        }
+
+        /// <summary>  
+        /// 当前系统DPI_X 大小 一般为96  
+        /// </summary>  
+        public static int DpiX
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var DpiX = GetDeviceCaps(hdc, LOGPIXELSX);
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return DpiX;
+            }
+        }
+
+        /// <summary>  
+        /// 当前系统DPI_Y 大小 一般为96  
+        /// </summary>  
+        public static int DpiY
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var DpiX = GetDeviceCaps(hdc, LOGPIXELSY);
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return DpiX;
+            }
+        }
+
+        /// <summary>  
+        /// 获取真实设置的桌面分辨率大小  
+        /// </summary>  
+        public static Size DESKTOP
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var size = new Size();
+                size.Width = GetDeviceCaps(hdc, DESKTOPHORZRES);
+                size.Height = GetDeviceCaps(hdc, DESKTOPVERTRES);
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return size;
+            }
+        }
+
+        /// <summary>  
+        /// 获取宽度缩放百分比  
+        /// </summary>  
+        public static float ScaleX
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var t = GetDeviceCaps(hdc, DESKTOPHORZRES);
+                var d = GetDeviceCaps(hdc, HORZRES);
+                var ScaleX = (float)GetDeviceCaps(hdc, DESKTOPHORZRES) / (float)GetDeviceCaps(hdc, HORZRES);
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return ScaleX;
+            }
+        }
+
+        /// <summary>  
+        /// 获取高度缩放百分比  
+        /// </summary>  
+        public static float ScaleY
+        {
+            get
+            {
+                var hdc = GetDC(IntPtr.Zero);
+                var scaleY = (float)GetDeviceCaps(hdc, DESKTOPVERTRES) / (float)GetDeviceCaps(hdc, VERTRES);
+
+                ReleaseDC(IntPtr.Zero, hdc);
+                return scaleY;
+            }
+        }
+        #endregion
+    }
+}