通过它的名称/标题返回窗口句柄 [英] Return Window handle by it's name / title

问题描述

我解决不了这个问题。
我得到一个错误：

I can't solve this problem. I get an error:

The name 'hWnd' does not exist in the current context

这听起来很容易，可能是...询问这么明显的问题抱歉。

It sounds very easy and probably is... sorry for asking so obvious questions.

下面是我的代码：

    public static IntPtr WinGetHandle(string wName)
    {
        foreach (Process pList in Process.GetProcesses())
        {
            if (pList.MainWindowTitle.Contains(wName))
            {
                IntPtr hWnd = pList.MainWindowHandle;
            }
        }
        return hWnd;
    }

我试着用很多不同的方式，每个失败。
先谢谢了。

I tried with many different ways and each fails. Thanks in advance.

推荐答案

不要忘了你，你声明的hWnd 循环中 - 这意味着它是只在循环里可见。如果窗口标题不存在，会发生什么？如果你想用为你应该把它声明的外循环，将其设置在循环内，然后返回它...

Don't forget you're declaring you hWnd inside the loop - which means it's only visible inside the loop. What happens if the window title doesn't exist? If you want to do it with a for you should declare it outside your loop, set it inside the loop then return it...

  IntPtr hWnd = IntPtr.Zero;
  foreach (Process pList in Process.GetProcesses())
  {
      if (pList.MainWindowTitle.Contains(wName))
      {
          hWnd = pList.MainWindowHandle;
      }
  }
  return hWnd; //Should contain the handle but may be zero if the title doesn't match

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