UIAutomation比API的优点是类似于消息处理机制，而不是主要靠模拟鼠标键盘发送消息

首先添加引用UIAutomationClient和UIAutomationTypes，在安装.net3.5的电脑上可用。低版本的VS可以直接引用dll。

using System.Windows.Automation;

//先用传统方法找到hwnd，用UI也能找到，新项目应统一到UI

IntPtr leftview = API.FindWindowEx(wd0, 0, "SysListView32", "CFQS");

IntPtr rightview = API.FindWindowEx(wd0, 0, "SysListView32", "List2");

if (leftview == IntPtr.Zero || rightview == IntPtr.Zero) return;

AutomationElement el = AutomationElement.FromHandle(leftview); //左侧view

AutomationElement er = AutomationElement.FromHandle(rightview); //右侧view

PropertyCondition condition_bk = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.DataItem); //查找子窗口的条件 同样是ListViewItem,对左边的只能用ControlType.DataItem，右边的用ControlType.ListItem

AutomationElementCollection bks = el.FindAll(TreeScope.Children, condition_bk); //获得所有满足条件子窗口的集合

//还有一种遍历子窗口的方法 用TreeWalker

//AutomationElement el = AutomationElement.FromHandle(leftview);

//TreeWalker walker = TreeWalker.ContentViewWalker;

//for (AutomationElement child = walker.GetFirstChild(el); child != null; child = walker.GetNextSibling(child))                    //{

//    string name=child.Current.Name

//}

API.mouse_event((int)(MouseEventFlags.Wheel | MouseEventFlags.Absolute), 0, 0, -380, IntPtr.Zero); //让滚动条下滚，仅为视觉效果，不要也行      

SelectionItemPattern selPattern = (SelectionItemPattern)item.GetCurrentPattern(SelectionItemPattern.Pattern);

selPattern.Select(); //选择该板块 //实现ListView内部元素选择

// item.Current.Name 可取出Listview内部元素内容

//PropertyCondition condition = new PropertyCondition(AutomationElement.IsEnabledProperty, true); //可通用所有非禁用项作为类型

2016.9.2补充

往控件中输入内容

AutomationElement element = AutomationElement.FromHandle(edbox);

object valuePattern = null;

if (element.TryGetCurrentPattern(ValuePattern.Pattern, out valuePattern)) //是否支持直接写入

{

                // Set focus for input functionality and begin.

                element.SetFocus();

                ((ValuePattern)valuePattern).SetValue(fullpath);

}

else //否则模拟键入

{

                // Set focus for input functionality and begin.

                element.SetFocus();

                // Pause before sending keyboard input.

                Thread.Sleep(100);

                // Delete existing content in the control and insert new content.

                SendKeys.SendWait("^{HOME}");   // Move to start of control

                SendKeys.SendWait("^+{END}");   // Select everything

                SendKeys.SendWait("{DEL}");     // Delete selection

                SendKeys.SendWait(fullpath);

}

2015.4.25利用UIAutomation 替代API函数，解决了ListView无法读数据的难题，顺便实现了鼠标模拟滚轮