1

SmartScan/Program.cs

@@ -7,6 +7,9 @@ using System.Runtime.InteropServices;
 using System.IO;
 using BLL;
 using log4net;
+using System.Text;
+using System.Collections.Generic;
+using log4net.Util;
 
 namespace SmartScan
 {
@@ -31,9 +34,9 @@ namespace SmartScan
             _ = new Mutex(true, Application.ProductName, out bool ret);
             if (!ret)
             {
-                IntPtr formhwnd = FindWindow(null, "BarCode Rule Setting");
+                IntPtr formhwnd = GetWindowHandle("BarCode Rule Setting");
                 if (formhwnd == IntPtr.Zero)
-                    formhwnd = FindWindow(null, "条码规则设置");
+                    formhwnd = GetWindowHandle("条码规则设置");
 
                 show($"查找条码规则窗口句柄：{formhwnd}");
                 if(formhwnd != IntPtr.Zero)
@@ -193,7 +196,11 @@ namespace SmartScan
         /// <param name="fAltTab">True代表窗口正在通过Alt/Ctrl +Tab被切换</param>
         [DllImport("user32.dll ", SetLastError = true)]
         static extern void SwitchToThisWindow(IntPtr hWnd, bool fAltTab);
-
+        [DllImport("user32.dll")]
+        private static extern int GetClassNameW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder lpString, int nMaxCount);
+        private delegate bool WNDENUMPROC(IntPtr hWnd, int lParam);
+        [DllImport("user32.dll")]
+        private static extern bool EnumWindows(WNDENUMPROC lpEnumFunc, int lParam);
         /// <summary>
         ///  设置窗口的显示状态 
         /// </summary>
@@ -203,7 +210,53 @@ namespace SmartScan
         [DllImport("user32.dll", EntryPoint = "ShowWindow", CharSet = CharSet.Auto)]
         public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
         public const int SW_RESTORE = 9;
-
+        [DllImport("user32.dll")]
+        private static extern int GetWindowTextW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder lpString, int nMaxCount);
         #endregion
+
+        //寻找系统的全部窗口
+        static WindowInfo[] GetAllDesktopWindows()
+        {
+            List<WindowInfo> wndList = new List<WindowInfo>();
+            EnumWindows(delegate (IntPtr hWnd, int lParam)
+            {
+                WindowInfo wnd = new WindowInfo();
+                StringBuilder sb = new StringBuilder(256);
+                //get hwnd
+                wnd.hWnd = hWnd;
+                //get window name
+                GetWindowTextW(hWnd, sb, sb.Capacity);
+                wnd.szWindowName = sb.ToString();
+                //get window class
+                GetClassNameW(hWnd, sb, sb.Capacity);
+                wnd.szClassName = sb.ToString();
+                Console.WriteLine("Window handle=" + wnd.hWnd.ToString().PadRight(20) + " szClassName=" + wnd.szClassName.PadRight(20) + " szWindowName=" + wnd.szWindowName);
+                //add it into list
+                wndList.Add(wnd);
+                return true;
+            }, 0);
+            return wndList.ToArray();
+        }
+        static IntPtr GetWindowHandle(string titleName)
+        {
+            WindowInfo[] a = GetAllDesktopWindows();
+            int i = 0;
+            for (i = 0; i < a.Length; i++)
+            {
+                // MessageBox.Show(a[i].szWindowName.ToString());
+                if (a[i].szWindowName.ToString().Contains(titleName))
+                {
+                    return a[i].hWnd;
+                }
+            }
+            return IntPtr.Zero;
+        }
+    }
+
+    public struct WindowInfo
+    {
+        public IntPtr hWnd;
+        public string szWindowName;
+        public string szClassName;
     }
 }