Question

我正在编写一个应用程序来连接其他两个现有的应用程序。我是C＃的新手，所以这对我来说是一个挑战。我目前尚未找到答案的问题是是否选中了复选框。我试图使用UIAutomation，但我无法弄清楚如何让它工作。当我使用UISpy选中复选框时，它表示该复选框是一个窗格。经过2天的搜索，我无法找到如何获取复选框作为窗格的信息。我当时认为pInvoke可以做到这一点，但我也没有任何运气。这是我尝试过的：

var ischecked = NativeMethods.SendMessage(variables.allCNumbers[29].Hwnd,BM_GETSTATE, IntPtr.Zero, IntPtr.Zero);
MessageBox.Show(variables.allCNumbers[29].Hwnd.ToString()); // This has a value
MessageBox.Show(ischecked.ToString()); // This always shows 0 whether the checkbox is checked or not

这是我尝试的UIAutomation：

    AutomationElement rootElement = AutomationElement.RootElement;

            Automation.Condition condition = new PropertyCondition(AutomationElement.ClassNameProperty,"TMainForm_ihm" );
        AutomationElement appElement = rootElement.FindFirst(TreeScope.Children, condition);
        AutomationElement workspace = appElement.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.NameProperty, "Workspace"));

        AutomationElement card = workspace.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.NameProperty, "Card"));

        AutomationElement pagecontrol = card.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.ClassNameProperty, "TRzPageControl"));
        AutomationElement cardnumber = pagecontrol.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.NameProperty, "Card number"));

        if(cardnumber != null)
        {
            Automation.Condition usecardCondition = new PropertyCondition(AutomationElement.AutomationIdProperty, "25232366");
            AutomationElement usecard = cardnumber.FindFirst(TreeScope.Children, usecardCondition);

            MessageBox.Show("usecard: " + usecard.Current.ControlType.ProgrammaticName); // This returns "ControlType.Pane"

            //TogglePattern tp1 = usecard.GetCurrentPattern(TogglePattern.Pattern) as TogglePattern; <- This throws an error: An unhandled exception of type 'System.InvalidOperationException' occurred in UIAutomationClient.dll  Additional information: Unsupported Pattern.
            //MessageBox.Show(tp1.Current.ToggleState.ToString());
        }

非常感谢任何帮助。

Answer 1

我以这篇文章 https://bytes.com/topic/net/answers/637107-how-find-out-if-check-box-checked 为灵感：

using Accessibility;

[DllImport("oleacc.dll", PreserveSig = false)]
[return: MarshalAs(UnmanagedType.Interface)]
public static extern object AccessibleObjectFromWindow(IntPtr hwnd, uint dwId, ref Guid riid);

public static Nullable<bool> isCheckBoxChecked(IntPtr checkBoxHandle)
{
    const UInt32 OBJID_CLIENT = 0xFFFFFFFC;
    const int UNCHECKED       = 1048576;
    const int CHECKED         = 1048592;
    Guid uid = new Guid("618736e0-3c3d-11cf-810c-00aa00389b71");

    IAccessible accObj = (IAccessible)AccessibleObjectFromWindow(checkBoxHandle, OBJID_CLIENT, ref uid);
    object o2 = accObj.get_accState(0);
    if ((int)o2 == UNCHECKED)
    {
        return false;
    }
    else if ((int)o2 == CHECKED)
    {
        return true;
    }
    else
    {
        return null;
    }
}

c＃在另一个应用程序中选中复选框

1 个答案: