public DialogResponse FileOpen64(string message, FileDialogOptions options)
{
var ofn = new WindowsInterop.OPENFILENAME_64();
ofn.lstructSize = Marshal.SizeOf(ofn);
if (Directory.Exists(options.Directory))
{
ofn.lpstrInitialDir = options.Directory;
}
ofn.lpstrFilter = options.Filters
.Select(f => $"{f.Name}\0*.{f.Extension}\0")
.Aggregate("", (s1, s2) => s1 + s2)
+ "\0";
ofn.lpstrFile = new string(' ', 4096);
ofn.lMaxFile = ofn.lpstrFile.Length;
ofn.lpstrTitle = options.Title;
ofn.lMaxFileTitle = ofn.lpstrTitle.Length;
ofn.lFlags = WindowsInterop.OFN_EXPLORER;
if (options.MustExist)
{
ofn.lFlags |= WindowsInterop.OFN_PATHMUSTEXIST | WindowsInterop.OFN_FILEMUSTEXIST;
}
var ok = WindowsInterop.GetOpenFileName64(ofn);
return(new DialogResponse {
IsCanceled = !ok, Value = ofn.lpstrFile
});
}
private int OnBrowseEvent(IntPtr hWnd, int msg, IntPtr lp, IntPtr lpData)
{
switch (msg)
{
case WindowsInterop.BFFM_INITIALIZED: // Required to set initialPath
{
//Win32.SendMessage(new HandleRef(null, hWnd), BFFM_SETSELECTIONA, 1, lpData);
// Use BFFM_SETSELECTIONW if passing a Unicode string, i.e. native CLR Strings.
if (!string.IsNullOrEmpty(_initialPath))
{
WindowsInterop.SendMessage(new HandleRef(null, hWnd), WindowsInterop.BFFM_SETSELECTIONW, 1, _initialPath);
}
break;
}
case WindowsInterop.BFFM_SELCHANGED:
{
var pathPtr = Marshal.AllocHGlobal(260 * Marshal.SystemDefaultCharSize);
if (WindowsInterop.SHGetPathFromIDList(lp, pathPtr))
{
WindowsInterop.SendMessage(new HandleRef(null, hWnd), WindowsInterop.BFFM_SETSTATUSTEXTW, 0, pathPtr);
}
Marshal.FreeHGlobal(pathPtr);
break;
}
}
return(0);
}
public DialogResponse MessageBox(string message, DialogOptions options)
{
var type = WindowsInterop.MB_SYSTEMMODAL | WindowsInterop.MB_SETFOREGROUND;
// ReSharper disable once SwitchStatementMissingSomeCases
switch (options.Icon)
{
case DialogIcon.Question:
type |= WindowsInterop.MB_ICONQUESTION;
break;
case DialogIcon.Information:
type |= WindowsInterop.MB_ICONINFORMATION;
break;
case DialogIcon.Warning:
type |= WindowsInterop.MB_ICONWARNING;
break;
case DialogIcon.Error:
type |= WindowsInterop.MB_ICONERROR;
break;
}
var ret = WindowsInterop.MessageBox(IntPtr.Zero, message, options.Title, type);
return(new DialogResponse {
IsCanceled = ret == WindowsInterop.IDCANCEL
});
}
private DialogResponse SelectFolderInternal(string message, FileDialogOptions options)
{
if (Directory.Exists(options.Directory))
{
_initialPath = options.Directory;
}
var pIdList = IntPtr.Zero;
var sb = new StringBuilder(256);
var bufferAddress = Marshal.AllocHGlobal(256);
var bi = new WindowsInterop.BROWSEINFO
{
hwndOwner = IntPtr.Zero,
pidlRoot = IntPtr.Zero,
pszDisplayName = message,
lpszTitle = options.Title,
ulFlags = WindowsInterop.BIF_NEWDIALOGSTYLE | WindowsInterop.BIF_SHAREABLE,
lpfn = OnBrowseEvent,
lParam = IntPtr.Zero,
iImage = 0
};
try
{
pIdList = WindowsInterop.SHBrowseForFolder(ref bi);
if (pIdList == IntPtr.Zero)
{
return(new DialogResponse {
IsCanceled = true
});
}
if (true != WindowsInterop.SHGetPathFromIDList(pIdList, bufferAddress))
{
return(new DialogResponse {
Value = string.Empty
});
}
sb.Append(Marshal.PtrToStringAuto(bufferAddress));
}
finally
{
// Caller is responsible for freeing this memory.
Marshal.FreeCoTaskMem(pIdList);
}
return(new DialogResponse {
Value = sb.ToString()
});
}
public DialogResponse SelectFolder(string message, FileDialogOptions options)
{
var result = new DialogResponse {
IsCanceled = true
};
var th = new Thread(() =>
{
WindowsInterop.OleInitialize(IntPtr.Zero);
result = SelectFolderInternal(message, options);
})
{
#pragma warning disable 618
ApartmentState = ApartmentState.STA
#pragma warning restore 618
};
th.Start();
th.Join();
return(result);
}
