/// <summary>Initializes a new instance of the <see cref="BROWSEINFO"/> struct.</summary>
/// <param name="hWnd">A handle to the owner window for the dialog box.</param>
/// <param name="rootPidl">A PIDL that specifies the location of the root folder from which to start browsing.</param>
/// <param name="title">The string that is displayed above the tree view control in the dialog box.</param>
/// <param name="flags">Flags that specify the options for the dialog box.</param>
/// <param name="callback">The callback function that the dialog box calls when an event occurs..</param>
/// <param name="displayNameBuffer">Buffer that receives the display name of the folder selected by the user.</param>
public BROWSEINFO(HWND hWnd, IntPtr rootPidl, string title, BrowseInfoFlag flags, BrowseCallbackProc callback, SafeCoTaskMemString displayNameBuffer)
{
hwndOwner = hWnd;
pidlRoot = rootPidl;
pszDisplayName = (IntPtr)displayNameBuffer;
lpszTitle = title;
ulFlags = flags;
lpfn = callback;
lParam = IntPtr.Zero;
iImage = 0;
}
public ShellBrowseForFolderDialog()
{
hwndOwner = IntPtr.Zero;
RootType = RootTypeOptions.BySpecialFolder;
RootSpecialFolder = ShellApi.CSIDL.CSIDL_DESKTOP;
RootPath = "";
m_DisplayName = "";
Title = "";
UserToken = IntPtr.Zero;
m_FullName = "";
// Default flags values
DetailsFlags = BrowseInfoFlag.BIF_BROWSEINCLUDEFILES
| BrowseInfoFlag.BIF_EDITBOX
| BrowseInfoFlag.BIF_NEWDIALOGSTYLE
| BrowseInfoFlag.BIF_SHAREABLE
| BrowseInfoFlag.BIF_STATUSTEXT
| BrowseInfoFlag.BIF_USENEWUI
| BrowseInfoFlag.BIF_VALIDATE;
}
public ShellBrowseForFolderDialog()
{
hwndOwner = IntPtr.Zero;
RootType = RootTypeOptions.BySpecialFolder;
RootSpecialFolder = ShellApi.CSIDL.CSIDL_DESKTOP;
RootPath = "";
m_DisplayName = "";
Title = "";
UserToken = IntPtr.Zero;
m_FullName = "";
// Default flags values
DetailsFlags = BrowseInfoFlag.BIF_BROWSEINCLUDEFILES
| BrowseInfoFlag.BIF_EDITBOX
| BrowseInfoFlag.BIF_NEWDIALOGSTYLE
| BrowseInfoFlag.BIF_SHAREABLE
| BrowseInfoFlag.BIF_STATUSTEXT
| BrowseInfoFlag.BIF_USENEWUI
| BrowseInfoFlag.BIF_VALIDATE;
}
/// <summary></summary>
protected override bool RunDialog(IntPtr hWndOwner)
{
IntPtr zero = IntPtr.Zero;
bool flag = false;
Win32.SHGetSpecialFolderLocation(hWndOwner, (int)this.mRootFolder, ref zero);
if (zero == IntPtr.Zero)
{
Win32.SHGetSpecialFolderLocation(hWndOwner, 0, ref zero);
if (zero == IntPtr.Zero)
{
throw new InvalidOperationException("No Root Folder.");
}
}
BrowseInfoFlag flags = BrowseInfoFlag.NewUserInterface;
if (!this.mShowNewFolderButton)
{
flags |= BrowseInfoFlag.NoNewFolderButton;
}
if (this.mIncludeFiles)
{
flags |= BrowseInfoFlag.BrowseEverything;
}
if (Control.CheckForIllegalCrossThreadCalls && (Application.OleRequired() != ApartmentState.STA))
{
throw new ThreadStateException("Thread Must Be STA.");
}
IntPtr pidl = IntPtr.Zero;
IntPtr hglobal = IntPtr.Zero;
IntPtr pszPath = IntPtr.Zero;
try
{
this.mCurrentCallback = new BrowseCallbackProc(this.FolderBrowserDialog_BrowseCallbackProc);
hglobal = Marshal.AllocHGlobal((int)(260 * Marshal.SystemDefaultCharSize));
pszPath = Marshal.AllocHGlobal((int)(260 * Marshal.SystemDefaultCharSize));
BROWSEINFO lpbi = new BROWSEINFO();
lpbi.pidlRoot = zero;
lpbi.hwndOwner = hWndOwner;
lpbi.pszDisplayName = hglobal;
lpbi.lpszTitle = this.mDescriptionText;
lpbi.ulFlags = (int)flags;
lpbi.lpfn = this.mCurrentCallback;
lpbi.lParam = IntPtr.Zero;
lpbi.iImage = 0;
pidl = Win32.SHBrowseForFolder(lpbi);
if (pidl != IntPtr.Zero)
{
Win32.SHGetPathFromIDList(pidl, pszPath);
this.mSelectedPathNeedsCheck = true;
this.mSelectedPath = Marshal.PtrToStringAuto(pszPath);
flag = true;
}
}
finally
{
IMalloc sHMalloc = GetSHMalloc();
sHMalloc.Free(zero);
if (pidl != IntPtr.Zero)
{
sHMalloc.Free(pidl);
}
if (pszPath != IntPtr.Zero)
{
Marshal.FreeHGlobal(pszPath);
}
if (hglobal != IntPtr.Zero)
{
Marshal.FreeHGlobal(hglobal);
}
this.mCurrentCallback = null;
}
return(flag);
}
/// <summary>
/// Shows the dialog box to let the user browse for and select a folder.
/// </summary>
/// <param name="parentWindowHandle">The HWND of the parent window.</param>
/// <returns>The selected folder or <c>null</c> if no folder was selected by the user.</returns>
protected override bool RunDialog(IntPtr parentWindowHandle)
{
// Make sure OLE is initialized. This is a prerequisite for calling SHBrowseForFolder.
NativeMethods.OleInitialize(IntPtr.Zero);
IntPtr rpidl = IntPtr.Zero;
NativeMethods.SHGetSpecialFolderLocation(parentWindowHandle, (int)RootFolder, out rpidl);
if (rpidl == IntPtr.Zero)
{
NativeMethods.SHGetSpecialFolderLocation(parentWindowHandle, 0, out rpidl);
if (rpidl == IntPtr.Zero)
{
throw new InvalidOperationException("No root folder specified for FolderBrowserDialog2.");
}
}
if (Control.CheckForIllegalCrossThreadCalls && (Application.OleRequired() != System.Threading.ApartmentState.STA))
{
throw new System.Threading.ThreadStateException("Debugging Exception Only. Thread must be STA.");
}
BrowseInfoFlag browseInfoFlag = BrowseInfoFlag.BIF_NEWDIALOGSTYLE | BrowseInfoFlag.BIF_SHAREABLE;
if (!ShowNewFolderButton)
{
browseInfoFlag |= BrowseInfoFlag.BIF_NONEWFOLDERBUTTON;
}
if (ShowFolderPathEditBox)
{
browseInfoFlag |= BrowseInfoFlag.BIF_EDITBOX | BrowseInfoFlag.BIF_VALIDATE;
}
if (ShowFiles)
{
browseInfoFlag |= BrowseInfoFlag.BIF_BROWSEINCLUDEFILES;
}
browseInfoFlag |= (BrowseInfoFlag)BrowserFlag;
NativeMethods.BROWSEINFO bi;
bi.hwndOwner = parentWindowHandle;
bi.pidlRoot = rpidl;
bi.pszDisplayName = new string('\0', 260);
bi.lpszTitle = Description;
bi.ulFlags = (uint)browseInfoFlag;
bi.lpfn = new NativeMethods.BrowseCallBackProc(OnBrowseEvent);
bi.lParam = IntPtr.Zero;
bi.iImage = 0;
StringBuilder sb = new StringBuilder(260);
IntPtr pidl = IntPtr.Zero;
try
{
pidl = NativeMethods.SHBrowseForFolder(ref bi);
if (((browseInfoFlag & BrowseInfoFlag.BIF_BROWSEFORPRINTER) == BrowseInfoFlag.BIF_BROWSEFORPRINTER) ||
((browseInfoFlag & BrowseInfoFlag.BIF_BROWSEFORCOMPUTER) == BrowseInfoFlag.BIF_BROWSEFORCOMPUTER))
{
SelectedPath = bi.pszDisplayName;
}
else
{
if (pidl == IntPtr.Zero || 0 == NativeMethods.SHGetPathFromIDList(pidl, sb))
{
return(false);
}
SelectedPath = sb.ToString();
}
return(true);
}
finally
{
if (rpidl != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(rpidl);
}
if (pidl != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pidl);
}
}
}
