public static extern IntPtr SHBrowseForFolder(BROWSEINFO bi);
/// <summary>
/// Call this method you have set the title, flags, etc. This will bring up
/// the browser dialog box. Pick the folder you want to select and hit OK. If
/// user clicks on Cancel button then no values for directory path, etc. are
/// returned. If user hits OK and not errors occur, then the reurn value from
/// the method id DialogResult.OK otherwise it can be DialogResult.Cancel or
/// DialogResult.Abort.
/// </summary>
/// <returns></returns>
public DialogResult ShowDialog()
{
// Create
BROWSEINFO bi = new BROWSEINFO();
bi.pszDisplayName = IntPtr.Zero;
bi.lpfn = IntPtr.Zero;
bi.lParam = IntPtr.Zero;
bi.lpszTitle = "Pfad für das lyra2 HTML-Verzeichnis...";
IntPtr idListPtr = IntPtr.Zero;
IntPtr pszPath = IntPtr.Zero;
try
{
if (this.m_strTitle.Length != 0)
{
bi.lpszTitle = this.m_strTitle;
}
bi.ulFlags = (int) this.m_Flags;
bi.pszDisplayName = Marshal.AllocHGlobal(256);
// Call SHBrowseForFolder
idListPtr = Win32SDK.SHBrowseForFolder(bi);
// Check if the user cancelled out of the dialog or not.
if (idListPtr == IntPtr.Zero)
{
return DialogResult.Cancel;
}
// Allocate ncessary memory buffer to receive the folder path.
pszPath = Marshal.AllocHGlobal(256);
// Call SHGetPathFromIDList to get folder path.
// Convert the returned native poiner to string.
m_strDirectoryPath = Marshal.PtrToStringAuto(pszPath);
this.m_strDisplayName = Marshal.PtrToStringAuto(bi.pszDisplayName);
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
return DialogResult.Abort;
}
finally
{
// Free the memory allocated by shell.
if (idListPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(idListPtr);
}
if (pszPath != IntPtr.Zero)
{
Marshal.FreeHGlobal(pszPath);
}
if (bi != null)
{
Marshal.FreeHGlobal(bi.pszDisplayName);
}
}
return DialogResult.OK;
}