Question

当对话框打开时，焦点位于名称框上。我必须选择10次才能找到文件，然后向下箭头指向我想要的文件。

我使用键盘而非鼠标。

private void LoadFileNow()
{
   OpenFileDialog Open = new OpenFileDialog();
   Open.Filter = "GCode Files|*.ngc";
   Open.Title = "Select a GCode File";
   // Show the Dialog.
   // If the user clicked OK in the dialog and
   // a .ngc file was selected, open it.
   if (Open.ShowDialog() == DialogResult.OK)
   {
      // Assign the GCode FileName to Var.
      GV.GCodeFile = Open.FileName;
      string f = "";
      f = String.Format("{0}{1}", "GCode File: ", Open.FileName);        //Change Ver. 4.0.1.1
      label6.Text = f;
      TextBox.LoadFile(Open.FileName,  RichTextBoxStreamType.PlainText);
   }
   Thread.Sleep(500); //Wait a moment while file loads.
}

Answer 1

好的，如果我说得对，你想在对话框打开时关注文件选择窗口？哦，你会爱上这个哈哈。可能是其他方式，但这有效:-p。仅在Windows 7中测试过。您可能需要更改控件搜索。

让我们调用一些东西

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string lclassName, string windowTitle);

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

[DllImport("user32.dll")]
internal static extern IntPtr SetForegroundWindow(IntPtr hWnd);

让我们获得父级的子控件的方法

private static List<IntPtr> GetAllChildrenWindowHandles(IntPtr hParent)
{
    List<IntPtr> result = new List<IntPtr>();
    IntPtr prevChild = IntPtr.Zero;
    IntPtr currChild = IntPtr.Zero;
    while (true)
    {
        currChild = FindWindowEx(hParent, prevChild, null, null);
        if (currChild == IntPtr.Zero)
        {
            break;
        }
        result.Add(currChild);
        prevChild = currChild;
    }
    return result;
}

这是我们将在您打开对话框之前在线程中运行的方法

private void FocusFileDialog()
{
    bool windowFound = false;
    while (!windowFound)
    {
        IntPtr od = FindWindow(null, "Select a GCode File");

        //found main dialog
        if (od != IntPtr.Zero)
        {
            IntPtr od1 = FindWindowEx(od, IntPtr.Zero, "DUIViewWndClassName", null);

            if (od1 != IntPtr.Zero)
            {
                IntPtr od2 = FindWindowEx(od1, IntPtr.Zero, "DirectUIHWND", null);

                if (od2 != IntPtr.Zero)
                {
                    List<IntPtr> results = GetAllChildrenWindowHandles(od2);

                    results.ForEach(hwd =>
                    {
                        IntPtr od3 = FindWindowEx(hwd, IntPtr.Zero, "SHELLDLL_DefView", null);

                        if (od3 != IntPtr.Zero)
                        {
                            IntPtr found = FindWindowEx(od3, IntPtr.Zero, "DirectUIHWND", null);

                            if (found != IntPtr.Zero)
                            {
                                SetForegroundWindow(found);
                                SetFocus(found);
                                windowFound = true;
                            }
                        }
                    });
                }
            }
        }
    }
}

以下是打开对话框的方法

new Thread(FocusFileDialog).Start();
using (OpenFileDialog Open = new OpenFileDialog())
{
    //your stuff here
}

附件来自Spy ++可能会帮助您理解。选择的是我们需要的指针。

enter image description here

如何在打开时让OpenFileDialog专注于“文件框”而不是“名称框”？

1 个答案: