如何使用Win32 API在TreeView中选择项目

Question

我正在尝试使用Win32 API自动化一系列用户输入到C#中的已编译应用程序.我没有任何我试图控制的应用程序的源代码,它正在运行,而我正在尝试控制它.在我的代码中,我有一个按钮,当单击时,需要为我试图控制的应用程序生成3个输入的序列:

1. 在树视图中选择一个项目
2. 单击按钮
3. 单击另一个按钮

它的工作方式是步骤2中的按钮根据在步骤1中的树视图中选择的项目执行操作.我能够通过简单地发送消息使按钮单击工作得很好,但我无法弄清楚如何选择我想要的TreeView项目.TreeView是静态的,因此项目和布局永远不会改变.它有以下布局:

-itemsA
-itemsB
--itemB1
-itemsC

其中itemB1是需要选择的项目,以便步骤2和3中的按钮单击工作.默认情况下,ItemsB已折叠,因此我可能需要先展开它才能选择ItemB1？这是我的代码.我非常感谢任何帮助!!

//Find Window API
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName, String lpWindowName);

//Find WindowEx API
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);

//Send Message API
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SendMessage(int hWnd, int msg, int wParam, IntPtr lParam);


private const int BN_CLICKED = 245;

//Method called by button click
public static void Start()
{
    int hwnd = 0;
    int prod = 0;
    IntPtr hwndChild = IntPtr.Zero;
    IntPtr treeChild = IntPtr.Zero;
    IntPtr prodChild = IntPtr.Zero;

    hwnd = FindWindow(null, "Application");
    if (hwnd > 0)
    {
        //Get Handle for TreeView, THIS IS WHERE I AM STUCK!!
        treeChild = FindWindowEx((IntPtr)hwnd, IntPtr.Zero, "AfxMDIFrame80", null);
        treeChild = FindWindowEx((IntPtr)treeChild, IntPtr.Zero, "AfxMDIFrame80", null);
        treeChild = FindWindowEx((IntPtr)treeChild, IntPtr.Zero, "SysTreeView32", null);
        //Need to Add code to select item in TreeView ???

        //Click First Button
        hwndChild = FindWindowEx((IntPtr)hwnd, IntPtr.Zero, "AfxMDIFrame80", null);
        hwndChild = FindWindowEx((IntPtr)hwndChild, IntPtr.Zero, "AfxMDIFrame80", null);
        hwndChild = FindWindowEx((IntPtr)hwndChild, IntPtr.Zero, "#32770", null);
        IntPtr scanBtn = FindWindowEx((IntPtr)hwndChild, IntPtr.Zero, "Button", "&Scan");
        SendMessage((int)scanBtn, BN_CLICKED, 0, IntPtr.Zero);

        //Click Second Button
        prod = FindWindow("#32770", "Product: WPC");
        prodChild = FindWindowEx((IntPtr)prod, IntPtr.Zero, "Button", "&Collect");
        SendMessage((int)prodChild, BN_CLICKED, 0, IntPtr.Zero);
    }
    }//END Start

汉斯,

你能给我一个如何做到这一点的例子吗？我真正遇到的问题是找到我想要选择的树视图项的句柄.如果我使用Spy ++查找当前句柄并将其硬编码到我的方法中,它可以正常工作,如下所示:

SendMessage((int)treeChild, TV_SELECTITEM, TVGN_CARET, (IntPtr)0x092DCB30); 

如果我使用SendMessage并将TVGN_ROOT发送到TreeView句柄,它是否会返回一个IntPtr,其中包含要在树视图中选择的项目的句柄,或者它是如何工作的？我也在尝试使用AutoIt,但我希望将所有代码保存在一个应用程序中.

Answer 1

我想通了,所以对于其他感兴趣的人来说,我发帖很难,我很难找到这方面的文件.这是我的大部分代码:

//Define TreeView Flags and Messages
private const int BN_CLICKED = 0xF5;
private const int TV_FIRST = 0x1100;
private const int TVGN_ROOT = 0x0;
private const int TVGN_NEXT = 0x1;
private const int TVGN_CHILD = 0x4;
private const int TVGN_FIRSTVISIBLE = 0x5;
private const int TVGN_NEXTVISIBLE = 0x6;
private const int TVGN_CARET = 0x9;
private const int TVM_SELECTITEM = (TV_FIRST + 11);
private const int TVM_GETNEXTITEM = (TV_FIRST + 10);
private const int TVM_GETITEM = (TV_FIRST + 12);

//Find Window API
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName, String lpWindowName);

//Find WindowEx API
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);

//Send Message API
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SendMessage(int hWnd, int msg, int wParam, IntPtr lParam);

 public static void Start()
        {
            //Handle variables
            int hwnd = 0;
            int treeItem = 0;
            IntPtr hwndChild = IntPtr.Zero;
            IntPtr treeChild = IntPtr.Zero;

            hwnd = FindWindow(null, "Application"); //Handle for the application to be controlled
            if (hwnd > 0)
            {
                //Select TreeView Item
                treeChild = FindWindowEx((IntPtr)hwnd, IntPtr.Zero, "AfxMDIFrame80", null);
                treeChild = FindWindowEx((IntPtr)treeChild, IntPtr.Zero, "AfxMDIFrame80", null);
                treeChild = FindWindowEx((IntPtr)treeChild, IntPtr.Zero, "SysTreeView32", null);
                treeItem = SendMessage((int)treeChild, TVM_GETNEXTITEM, TVGN_ROOT, IntPtr.Zero);
                treeItem = SendMessage((int)treeChild, TVM_GETNEXTITEM, TVGN_NEXT, (IntPtr)treeItem);
                treeItem = SendMessage((int)treeChild, TVM_GETNEXTITEM, TVGN_CHILD, (IntPtr)treeItem);
                SendMessage((int)treeChild, TVM_SELECTITEM, TVGN_CARET, (IntPtr)treeItem);

                // ...Continue with my automation...
             }
        }//END Scan

我可能仍然不理解这100%,但希望这有帮助.SendMessage返回值取决于您要发送的消息,在这种情况下,它是一个包含TreeView项的句柄的int.第一个参数是TreeView本身的句柄.第二个参数是您要发送的消息.第3和第4个参数是标志.第3个指定项目的类型,第4个是当前树视图项目的句柄.

谢谢Hans的帮助!其他人,请随时详细说明.