c# - 为什么适配器不工作？

Question

我有两个应用程序分别命名为 app 和 anotherapp 以及一个类库 myadp.dll

app 包含:

using myadp;
namespace app
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void bt_Click(object sender, RoutedEventArgs e)
        {
            Class1 c = new Class1();
            tbinapp.Text = c.st;
        }
    }
}

另一个应用包含:

using myadp;
namespace anotherapp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void anotherbt_Click(object sender, RoutedEventArgs e)
        {
            Class1 ad = new Class1();
            ad.st = anothertb.Text;
        }
    }
}

myadp.dll 包含:

namespace myadp
{
    public class Class1
    {
      public  string st = "this is from adapter ";
    }
}

我正在尝试使用 myadp 作为适配器将值从 anotherapp 传递到 app。但它不起作用。我假设它不起作用，因为每个应用程序都在 myadp 中创建类 Class1 的新实例。我对吗？如何测试并修复它？

Answer 1

终于成功了(这里适配器的 readfromnotepad() 返回记事本编辑字段上的字符串)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

using System.Threading.Tasks;
//using System.ServiceModel.Dispatcher;

namespace finally_adapter
{
    public class adapt_
    {
        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr GetWindow(IntPtr hWnd, GetWindow_Cmd uCmd);
        enum GetWindow_Cmd : uint {
   GW_HWNDFIRST = 0,
   GW_HWNDLAST = 1,
   GW_HWNDNEXT = 2,
   GW_HWNDPREV = 3,
   GW_OWNER = 4,
   GW_CHILD = 5,
   GW_ENABLEDPOPUP = 6
}

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);


        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, [Out] StringBuilder lParam);

        [DllImport("User32.dll")]
        public static extern Int32 FindWindow(String lpClassName, String lpWindowName);

        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);




        int len;
        public string strin;
        const int WM_GETTEXT = 0x000D;
        StringBuilder sb = new StringBuilder(100);
        IntPtr hwnd;
        public adapt_()
        {

        }
        public string readfromnotepad()
        {
            string lpclassname = "Edit";
            string lpwindowname = "Notepad";
            int temp = FindWindow(lpwindowname,null);
            hwnd = (IntPtr)temp;
            StringBuilder temps = new StringBuilder(100);
            IntPtr edit_hwnd = GetWindow(hwnd, GetWindow_Cmd.GW_CHILD);
            IntPtr msg_hwnd = SendMessage(edit_hwnd, WM_GETTEXT, (IntPtr)100, temps);

            return temps.ToString();


        }


    }
}