Question

我想知道如何使用C＃获取当前活动窗口（即具有焦点的窗口）的Window标题。

Answer 1

请参阅示例，了解如何使用完整源代码执行此操作：

http://www.csharphelp.com/2006/08/get-current-window-handle-and-caption-with-windows-api-in-c/

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

[DllImport("user32.dll")]
static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

private string GetActiveWindowTitle()
{
    const int nChars = 256;
    StringBuilder Buff = new StringBuilder(nChars);
    IntPtr handle = GetForegroundWindow();

    if (GetWindowText(handle, Buff, nChars) > 0)
    {
        return Buff.ToString();
    }
    return null;
}

编辑与@Doug McClean发表评论以获得更好的正确性。

Answer 2

如果您在谈论WPF，请使用：

 Application.Current.Windows.OfType<Window>().SingleOrDefault(w => w.IsActive);

Answer 3

使用Windows API。致电GetForegroundWindow()。

GetForegroundWindow()将为您提供活动窗口的句柄（名为hWnd）。

文档：GetForegroundWindow function | Microsoft Docs

Answer 4

循环Application.Current.Windows[]并找到IsActive == true。

Answer 5

基于GetForegroundWindow function | Microsoft Docs：

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern IntPtr GetForegroundWindow();

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

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

private string GetCaptionOfActiveWindow()
{
    var strTitle = string.Empty;
    var handle = GetForegroundWindow();
    // Obtain the length of the text   
    var intLength = GetWindowTextLength(handle) + 1;
    var stringBuilder = new StringBuilder(intLength);
    if (GetWindowText(handle, stringBuilder, intLength) > 0)
    {
        strTitle = stringBuilder.ToString();
    }
    return strTitle;
}

它支持UTF8字符。

Answer 6

如果您需要来自MDI应用程序的 当前活动表格 :( MDI-多文档界面）。

Form activForm;
activForm = Form.ActiveForm.ActiveMdiChild;

如何使用c＃获取当前活动窗口的标题？

6 个答案: