private bool ShowDialogInternal(ref BrowseInfo bi)
{
bi.title = title;
bi.displayname = new string('\0', 260);
bi.callback = new BrowseCallBackProc(this.CallBack);
bi.flags = (int)flags;
//Free any old pidls
if (pidlReturned != IntPtr.Zero)
{
UnManagedMethods.SHMemFree(pidlReturned);
}
bool ret = (pidlReturned = UnManagedMethods.SHBrowseForFolder(ref bi)) != IntPtr.Zero;
if (ret)
{
displayName = bi.displayname;
}
//Reset the handle
handle = IntPtr.Zero;
return(ret);
}
protected override void Dispose(bool disposing)
{
if (pidlReturned != IntPtr.Zero)
{
UnManagedMethods.SHMemFree(pidlReturned);
pidlReturned = IntPtr.Zero;
}
}
/// <summary>
/// Expand a path in the folder
/// </summary>
/// <param name="path">The path to expand</param>
public void SetExpanded(string path)
{
IntPtr strptr = Marshal.StringToHGlobalUni(path);
UnManagedMethods.SendMessage(handle, BFFM_SETEXPANDED, new IntPtr(1), strptr);
Marshal.FreeHGlobal(strptr);
}
/// <summary>
/// Enables or disables the ok button
/// </summary>
/// <param name="bEnable">true to enable false to diasble the OK button</param>
public void EnableOkButton(bool bEnable)
{
if (handle == IntPtr.Zero)
{
throw new InvalidOperationException();
}
IntPtr lp = bEnable ? new IntPtr(1) : IntPtr.Zero;
UnManagedMethods.SendMessage(handle, BFFM_ENABLEOK, IntPtr.Zero, lp);
}
/// <summary>
/// Sets the text of the OK button in the dialog
/// </summary>
/// <param name="text">New text of the OK button</param>
public void SetOkButtonText(string text)
{
if (handle == IntPtr.Zero)
{
throw new InvalidOperationException();
}
IntPtr strptr = Marshal.StringToHGlobalUni(text);
UnManagedMethods.SendMessage(handle, BFFM_SETOKTEXT, new IntPtr(1), strptr);
Marshal.FreeHGlobal(strptr);
}
/// <summary>
/// Sets the text of the staus area of the folder dialog
/// </summary>
/// <param name="text">Text to set</param>
public void SetStatusText(string text)
{
if (handle == IntPtr.Zero)
{
throw new InvalidOperationException();
}
int msg = (Environment.OSVersion.Platform == PlatformID.Win32NT) ? BFFM_SETSTATUSTEXTW : BFFM_SETSTATUSTEXTA;
IntPtr strptr = Marshal.StringToHGlobalAuto(text);
UnManagedMethods.SendMessage(handle, msg, IntPtr.Zero, strptr);
Marshal.FreeHGlobal(strptr);
}
/// <summary>
/// Sets the selection the text specified
/// </summary>
/// <param name="newsel">The path of the folder which is to be selected</param>
public void SetSelection(string newsel)
{
if (handle == IntPtr.Zero)
{
throw new InvalidOperationException();
}
int msg = (Environment.OSVersion.Platform == PlatformID.Win32NT) ? BFFM_SETSELECTIONA : BFFM_SETSELECTIONW;
IntPtr strptr = Marshal.StringToHGlobalAuto(newsel);
UnManagedMethods.SendMessage(handle, msg, new IntPtr(1), strptr);
Marshal.FreeHGlobal(strptr);
}
public void Dispose()
{
UnManagedMethods.SHMemFree(pidlNewSelect);
}