如何使用 c# 获取当前活动窗口的标题？
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How do I get the title of the current active window using c#?
提问by d4nt
I'd like to know how to grab the Window title of the current active window (i.e. the one that has focus) using C#.
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）的窗口标题。
采纳答案by Jorge Ferreira
See example on how you can do this with full source code here:
在此处查看有关如何使用完整源代码执行此操作的示例：
http://www.csharphelp.com/2006/08/get-current-window-handle-and-caption-with-windows-api-in-c/
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;
}
Editedwith @Doug McClean comments for better correctness.
使用@Doug McClean 评论进行编辑以获得更好的正确性。
回答by ine
Use the Windows API. Call GetForegroundWindow().
使用 Windows API。打电话GetForegroundWindow()。
GetForegroundWindow()will give you a handle (named hWnd) to the active window.
GetForegroundWindow()将为您提供hWnd活动窗口的句柄（名为）。
Documentation: GetForegroundWindow function | Microsoft Docs
回答by Jorge Ferreira
Loop over Application.Current.Windows[]and find the one with IsActive == true.
循环Application.Current.Windows[]并找到带有 的那个IsActive == true。
回答by Skvettn
If you were talking about WPF then use:
如果您在谈论 WPF，请使用：
Application.Current.Windows.OfType<Window>().SingleOrDefault(w => w.IsActive);
回答by B.Beshoo
you can use process class it's very easy. use this namespace
您可以使用流程类，这非常简单。使用这个命名空间
using System.Diagnostics;
if you want to make a button to get active window.
如果你想制作一个按钮来获得活动窗口。
private void button1_Click(object sender, EventArgs e)
{
Process currentp = Process.GetCurrentProcess();
TextBox1.Text = currentp.MainWindowTitle; //this textbox will be filled with active window.
}
回答by Arthur Zennig
If it happens that you need the Current Active Form from your MDI application: (MDI- Multi Document Interface).
如果碰巧您需要来自 MDI 应用程序的当前活动表单：（MDI-多文档界面）。
Form activForm;
activForm = Form.ActiveForm.ActiveMdiChild;
回答by Mohammad Dayyan
Based on GetForegroundWindow function | Microsoft Docs:
基于GetForegroundWindow 函数| 微软文档：
[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;
}
It supports UTF8 characters.
它支持 UTF8 字符。
