/// <summary>
/// 选择指定项
/// </summary>
/// <param name="itemIndex"></param>
public void SelectItem(Int32 itemIndex)
{
WinCtrlAPI.ListView.LVITEM listView = new WinCtrlAPI.ListView.LVITEM();
//listView.iItem = itemIndex;
listView.mask = SystemDefinedMessages.CommonControl.LVIF_STATE;
listView.stateMask = SystemDefinedMessages.CommonControl.LVIS_FOCUSED | SystemDefinedMessages.CommonControl.LVIS_SELECTED;
listView.state = SystemDefinedMessages.CommonControl.LVIS_FOCUSED | SystemDefinedMessages.CommonControl.LVIS_SELECTED;
listView.cchTextMax = 0;
listView.iImage = 0;
IntPtr listViewPtr = Marshal.AllocHGlobal(Marshal.SizeOf(listView));
Marshal.StructureToPtr(listView, listViewPtr, false);
Int32 re = API.SendMessage(m_ListViewPtr, SystemDefinedMessages.CommonControl.LVM_SETITEMSTATE, itemIndex, listViewPtr.ToInt32());
Marshal.FreeHGlobal(listViewPtr);
}
/// <summary>
/// 获取制定图标的文本
/// </summary>
/// <returns></returns>
public String GetItemText(Int32 itemIndex)
{
String result = String.Empty;
UInt32 pref = 0;
WinCtrlAPI.ListView.LVITEM _lv = new WinCtrlAPI.ListView.LVITEM();
// 打开桌面进程
IntPtr proPtr = API.OpenProcess(API.ProcessSecurityAccessRight.PROCESS_VM_OPERATION | API.ProcessSecurityAccessRight.PROCESS_VM_READ | API.ProcessSecurityAccessRight.PROCESS_VM_WRITE, false, (UInt32)m_ProcessID);
// 在桌面进程给文本分配一段内存
IntPtr textPtr = API.VirtualAllocEx(proPtr, IntPtr.Zero, 260, API.MemoryAllocationType.MEM_COMMIT, API.MemoryProtectionConstants.PAGE_EXECUTE_READWRITE);
_lv.pszText = textPtr;
_lv.mask = SystemDefinedMessages.CommonControl.LVIF_TEXT;
_lv.iSubItem = 0;
_lv.cchTextMax = 260;
// 给LVItem分配一段内存
IntPtr lvPtr = API.VirtualAllocEx(proPtr, IntPtr.Zero, Marshal.SizeOf(_lv), API.MemoryAllocationType.MEM_COMMIT, API.MemoryProtectionConstants.PAGE_EXECUTE_READWRITE);
// 在当前进程分配一段内存，将ListView对象转化为结构体写入当前进程内存，
IntPtr tmpPtr = Marshal.AllocHGlobal(Marshal.SizeOf(_lv));
Marshal.StructureToPtr(_lv, tmpPtr, false);
// 将当前进程内存中的结构体写入到桌面进程内存中。
Boolean writeResult = API.WriteProcessMemory(proPtr, lvPtr, tmpPtr, Marshal.SizeOf(_lv), ref pref);
if (!writeResult)
{
throw new ApplicationException("写入内存错误：" + API.GetLastError().ToString());
}
Marshal.FreeHGlobal(tmpPtr);
// 发送消息，接收文本
Int32 msgResult = API.SendMessage(this.m_ListViewPtr, SystemDefinedMessages.CommonControl.LVM_GETITEMTEXT, itemIndex, lvPtr);
if (msgResult == 0)
{
throw new ApplicationException(API.GetLastError().ToString());
}
// 在本程序分配一段内存空间，将桌面进程的内存读取到本进程，然后在转换为文本。
IntPtr tmpPtr2 = Marshal.AllocHGlobal(260);
Boolean readResult = API.ReadProcessMemory(proPtr, textPtr, tmpPtr2, 260, ref pref);
if (readResult)
{
result = Marshal.PtrToStringAuto(tmpPtr2);
}
Marshal.FreeHGlobal(tmpPtr2);
// 释放桌面进程中开辟的内存
API.VirtualFreeEx(proPtr, lvPtr, 0, API.MemoryFreeType.MEM_RELEASE);
API.VirtualFreeEx(proPtr, textPtr, 0, API.MemoryFreeType.MEM_RELEASE);
// 关闭桌面进程
API.CloseHandle(proPtr);
return(result);
}