Да. Это действительно сложный вопрос. Мне потребовалась 1 неделя, чтобы сделать его работоспособным, когда мне поручили работать с этим. В любом случае, я дал вам часть кода ниже. С помощью этого кода вы можете установить текст для элемента управления Edit диалогового окна Save / Open. Не ограничиваясь только этими задачами, с этим вы можете делать все что угодно с этим окном,
Посмотрите пожалуйста.
public delegate int CallbackToFindChildWindow(int hWnd, int lParam);
private void AccessEditControlOfDialog()
{
IntPtr winHandle = IntPtr.Zero;
winHandle = GetActiveWindow();
const int NumberOfChars = 256;
string dialogCaption = string.Empty;
StringBuilder buff = new StringBuilder(NumberOfChars);
////Getting the caption of window..eg. Open/Save/Save as
if (GetWindowText((int)winHandle, buff, NumberOfChars) > 0)
{
dialogCaption = buff.ToString();
}
////Getting the ClassName of the Dialog Window handle
StringBuilder winClassName = new StringBuilder();
int numChars = GetClassName((IntPtr)winHandle, winClassName, winClassName.Capacity);
int targetControlWinHandle;
CallbackToFindChildWindow myCallBack = new CallbackToFindChildWindow(this.EnumChildGetValue);
////Find the window handle by using its caption
targetControlWinHandle = FindWindow(null, dialogCaption);
if (targetControlWinHandle == 0)
{
Logger.Error("No handle value is found in the Common Doalog");
}
else
{
EnumChildWindows(targetControlWinHandle, myCallBack, 0);
}
}
private int EnumChildGetValue(int handleWnd, int param)
{
StringBuilder controlWinClassName = new StringBuilder();
////Getting the ClassName of the Control Window handle
int numChars = GetClassName((IntPtr)handleWnd, controlWinClassName, controlWinClassName.Capacity);
if (controlWinClassName != null)
{
string text = "hi";
////For Normal Common Dialog box, the class name of Edit box is "Edit" which is for office 2007 "RichEdit20W"
if ((!string.Equals(controlWinClassName.ToString().Trim(), ""))
&& (controlWinClassName.ToString().Equals("Edit") || controlWinClassName.ToString().Equals("RichEdit20W")))
{
if (controlWinClassName.ToString().Equals("Edit"))
{
//// Set Text to the Edit box
SendMessage(handleWnd, WM_SETTEXT, text.Length, text);
}
else if (controlWinClassName.ToString().ToLower().Equals("richedit20w"))
{
SendMessage(handleWnd, WM_SETTEXT, 1, "");
////Set the path to the RichEdit20W Which is specially for office 2007 and winxp
this.SetRichEditText((IntPtr)handleWnd, text);
}
}
}
}
private void SetRichEditText(IntPtr handleWnd, string text)
{
try
{
const uint WM_USER = 0x0400;
SETTEXTEX setextex = new SETTEXTEX();
setextex.codepage = 1200;
setextex.flags = RTBW_FLAGS.RTBW_SELECTION;
IntPtr ptr = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(System.Runtime.InteropServices.Marshal.SizeOf(setextex.GetType()));
System.Runtime.InteropServices.Marshal.StructureToPtr(setextex, ptr, true);
IntPtr stringPtr = System.Runtime.InteropServices.Marshal.StringToBSTR(text);
int result = SendMessage((int)handleWnd, (int)WM_USER + 97, ptr.ToInt32(), text);
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(ptr);
System.Runtime.InteropServices.Marshal.FreeBSTR(stringPtr);
}
catch (Exception oEx)
{
Logger.Exception(oEx, "SetRichEditText");
throw;
}
}
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName, String lpWindowName);
[DllImport("User32.dll")]
public static extern Boolean EnumChildWindows(int hWndParent, Delegate lpEnumFunc, int lParam);
[DllImport("user32.dll")]
public static extern IntPtr GetActiveWindow();
[DllImport("User32.dll")]
public static extern Int32 GetWindowText(int hWnd, StringBuilder s, int nMaxCount);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
public const Int32 WM_SETTEXT = 0x000C;
[StructLayout(LayoutKind.Sequential)]
public struct SETTEXTEX
{
public ABC.FileSystemBrowser.CustomView.CommonEnum.RTBW_FLAGS flags;
public long codepage;
}
public enum RTBW_FLAGS
{
RTBW_DEFAULT = 0,
RTBW_KEEPUNDO = 1,
RTBW_SELECTION = 2
}