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如何获取当前焦点窗口的选中文本?

selection focus c#

1

AbyxDev user411313 · 技术社区 · 7 年前

因此,我正在尝试创建一个执行以下操作的应用程序:

监听键盘快捷键(使用 this library )
当快捷方式被点击时,检索当前所选文本的内容,以及
处理文本

我使用的方法是 this answer ( this method )将我的应用程序附加到焦点控件,但是 GetText 那个方法中的函数不能满足我的需要。

我见过 this answer 同样,但这只给出了如何使焦点窗口双击的详细步骤,这不是我需要的。它确实链接到 this question 这让我尝试 WM_KEYDOWN 方法(如下所示),但也不起作用。

到目前为止我已经试过了 获得文本 方法(全部在该msdn post的上下文中):

string GetText(IntPtr handle)
{
    // works in Notepad, but not Chrome
    SendMessageW(handle, WM_COPY, 0, 0);
    string w = Clipboard.GetText();
    return w;

    // works in every app, but in Notepad gets the complete contents
    // and in Chrome gets the window title
    int maxLength = 160;
    IntPtr buffer = Marshal.AllocHGlobal((maxLength + 1) * 2);
    SendMessageW(handle, WM_GETTEXT, maxLength, buffer);
    string w = Marshal.PtrToStringUni(buffer);
    Marshal.FreeHGlobal(buffer);
    return w;

    // I would have thought these would work, but
    // they don't do anything for some reason. They
    // all simulate a Ctrl+C.

    SendKeys.SendWait("^c");
    // or
    // this is from the same library that listens for the keyboard shortcut
    KeyboardSimulator.SimulateStandardShortcut(StandardShortcut.Copy);
    // or
    SendMessageW(handle, WM_KEYDOWN, (ushort)Keys.LControlKey, 0);
    SendMessageW(handle, WM_KEYDOWN, (ushort)Keys.C, 0);
    SendMessageW(handle, WM_KEYUP, (ushort)Keys.C, 0);
    SendMessageW(handle, WM_KEYUP, (ushort)Keys.LControlKey, 0);
    // after any of those
    string w = Clipboard.GetText();
    return w;
}

(我还不在乎保存剪贴板。)

如何始终获取当前关注的应用程序的选定文本?不篡改剪贴板的奖励积分,但使用它也是可以的。

1 回复 | 直到 7 年前

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Deleted 7 年前

WM_GETTEXT

using System;
using System.Diagnostics;
using System.Linq;
using System.Windows.Automation;

namespace UiaTest
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var p = Process.GetProcessesByName("notepad").FirstOrDefault();       
            var root = AutomationElement.FromHandle(p.MainWindowHandle);

            var documentControl = new                                 
                    PropertyCondition(AutomationElement.ControlTypeProperty, 
                                      ControlType.Document);

            var textPatternAvailable = new PropertyCondition(AutomationElement.IsTextPatternAvailableProperty, true);

            var findControl = new AndCondition(documentControl, textPatternAvailable);

            var targetDocument = root.FindFirst(TreeScope.Descendants, findControl);    
            var textPattern = targetDocument.GetCurrentPattern(TextPattern.Pattern) as TextPattern;

            foreach (var selection in textPattern.GetSelection())
            {
                Console.WriteLine($"Selection: \"{selection.GetText(255)}\"");
            }    
        }
    }
}

var p = Process.GetProcessesByName("notepad").FirstOrDefault();

IntPtr handle = GetForegroundWindow();
var root = AutomationElement.FromHandle(handle);

GetForegroundWindow

[DllImport("user32.dll")]
static extern IntPtr GetForegroundWindow();