C# winfrom datagridview数据获取

发布网友发布时间：2022-04-22 13:59

共1个回答

热心网友时间：2023-08-22 03:03

办法三种（*Winform对Winform操作）:

数据量轻量级，实时传值。用Remoting，建立类库，编写方法放在类库文件中，编译成dll文件。建立两个项目，引用他，实现remoting操作实时传值

数据量，提倡方法，代码贴出

[DllImport("User32.dll", EntryPoint = "FindWindow")]
        public extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
        [DllImport("User32.dll", EntryPoint = "FindWindowEx")]
        public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpClassName, string lpWindowName);
        [DllImport("User32.dll", EntryPoint = "FindEx")]
        public static extern IntPtr FindEx(IntPtr hwnd, IntPtr hwndChild, string lpClassName, string lpWindowName);
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);
        [DllImport("user32.dll ", EntryPoint = "GetDlgItem")]
        public static extern IntPtr GetDlgItem(IntPtr hParent, int nIDParentItem);
        [DllImport("user32.dll", EntryPoint = "GetWindowText")]
        public static extern int GetWindowText(IntPtr hwnd, StringBuilder lpString, int cch);

//在事件里写

IntPtr maindHwnd = FindWindow(null, "Form1"); //获得句柄
            int i = 0;
            if (maindHwnd != IntPtr.Zero)
            {
                MessageBox.Show("找到了窗体！");
                //控件id
                int controlId = 0x000003F4;
                //获取子窗口句柄
                IntPtr EdithWnd = GetDlgItem(maindHwnd, controlId);
                SendMessage(EdithWnd, i, (IntPtr)0, string.Format("当前时间是:{0}", DateTime.Now)); //赋值没问题，表示句柄正确
                StringBuilder stringBuilder = new StringBuilder(512);
                GetWindowText(EdithWnd, stringBuilder, stringBuilder.Capacity);
                MessageBox.Show(string.Format("取到的值是：{0}", stringBuilder.ToString()));//取值一直是空字符串
            }
            else
            {
                MessageBox.Show("没有找到窗口");
            }

3. 大数据的话还是用数据库吧