Die beste Möglichkeit, die Dateipfad zu lange Ausnahme zu lösen

Erstellte ich eine app, die downloads alle Dokumentbibliotheken in einer SP-Site , aber bei einem Punkt, der es mir dieser Fehler (ich habe gesucht bei google, aber konnte nicht finden, alles, jetzt, wenn jemand weiß, jeden trick, um dieses problem zu lösen bitte Antworten, ansonsten danke für das anschauen)

System.IO.PathTooLongException: Der angegebene Pfad, Dateiname oder beide sind zu lang. Der vollständig qualifizierte Dateiname muss weniger als 260 Zeichen und der name des Verzeichnisses muss mit weniger als 248 Zeichen.
System.IO.Pfad.NormalizePathFast(String path, Boolean fullCheck)
System.IO.Pfad.GetFullPathInternal(String path)
System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
System.IO.Datei.Create(String path)

er erreicht die Grenze für string, Code ist unten angegeben,

#region Downloading Schemes

    private void btnDownload_Click(object sender, EventArgs e)
    {
        TreeNode currentNode = tvWebs.SelectedNode;
        SPObjectData objectData = (SPObjectData)currentNode.Tag;
        try
        {
            CreateLoggingFile();
            using (SPWeb TopLevelWeb = objectData.Web)
            {
                if(TopLevelWeb != null)
                    dwnEachWeb(TopLevelWeb, TopLevelWeb.Title, tbDirectory.Text);
            }
        }
        catch (Exception ex)
        {
            Trace.WriteLine(string.Format("Exception caught when tried to pass TopLevelWeb:{1}, Title = {2}, object data to (dwnEachWeb_method), Exception: {0}", ex.ToString(), objectData.Web, objectData.Title));
        }
        finally
        {
            CloseLoggingFile();
        }
    }

    private void dwnEachWeb(SPWeb TopLevelWeb, string FolderName, string CurrentDirectory)
    {
        if (TopLevelWeb != null)
        {
            if (TopLevelWeb.Webs != null)
            {
                CurrentDirectory = CurrentDirectory + "\\" + TopLevelWeb.Title;
                CreateFolder(CurrentDirectory);
                foreach (SPWeb ChildWeb in TopLevelWeb.Webs)
                {

                    dwnEachWeb(ChildWeb, ChildWeb.Title, CurrentDirectory);
                    ChildWeb.Dispose();
                }
                dwnEachList(TopLevelWeb, CurrentDirectory);
                //dwnEachList(TopLevelWeb, FolderName, CurrentDirectory);
            }
        }
    }

    private void dwnEachList(SPWeb oWeb, string CurrentDirectory)
    {
        foreach (SPList oList in oWeb.Lists)
        {
            if (oList is SPDocumentLibrary && !oList.Hidden)
            {
                dwnEachFile(oList.RootFolder, CurrentDirectory);
            }
        }
    }

    private void dwnEachFile(SPFolder oFolder, string CurrentDirectory)
    {
        if (oFolder.Files.Count != 0)
        {
            CurrentDirectory = CurrentDirectory + "\\" + oFolder.Name;
            CreateFolder(CurrentDirectory);
            foreach (SPFile ofile in oFolder.Files)
            {
                if (CreateDirectoryStructure(CurrentDirectory, ofile.Url))
                {
                    var filepath = System.IO.Path.Combine(CurrentDirectory, ofile.Url);
                    byte[] binFile = ofile.OpenBinary();
                    System.IO.FileStream fstream = System.IO.File.Create(filepath);
                    fstream.Write(binFile, 0, binFile.Length);
                    fstream.Close();
                }
            }
        }
    }

    //creating directory where files will be download        
    private bool CreateDirectoryStructure(string baseFolder, string filepath)
    {
        if (!Directory.Exists(baseFolder)) return false;

        var paths = filepath.Split('/');

        for (var i = 0; i < paths.Length - 1; i++)
        {
            baseFolder = System.IO.Path.Combine(baseFolder, paths[i]);
            Directory.CreateDirectory(baseFolder);
        }
        return true;
    }

    //creating folders
    private bool CreateFolder(string CurrentDirectory)
    {
        if (!Directory.Exists(CurrentDirectory))
        {
            Directory.CreateDirectory(CurrentDirectory);
        }
        return true;
    }

    //shorting string

    #endregion

InformationsquelleAutor der Frage Muhammad Raja | 2012-01-05