sharepoint-正则表达式在文档库取文件

[WebMethod]

    public byte[] GetAttachmentFileflowByName(string webPath, string listName, string regular)

    {

        try

        {

            using (SPSite site = new SPSite(webPath))

            {

                SPWeb web = site.OpenWeb();

                SPFolder folder= web.Folders[listName];

                if (folder!=null)

                {

                    SPFile file = GetFileFormFolder(folder, regular);

                    if (file!=null)

                    {

                        return file.OpenBinary();

                    }

                }

                return new byte[] { };

            }

        }

        catch (Exception)

        {

            return new byte[] { };

        }

    }

    /// <summary>

    /// 在SPFolder中寻找指定regular文件

    /// </summary>

    /// <param name="folder"></param>

    /// <param name="regular"></param>

    /// <returns>返回SPFile如无则返回null</returns>

    public SPFile GetFileFormFolder(SPFolder folder, string regular) 

    {

        if (folder.Files.Count>0)

        {

            foreach (SPFile file in folder.Files)

            {

                if (System.Text.RegularExpressions.Regex.IsMatch(file.Name, regular))

                {

                    return file;

                }

            }

        }

        if (folder.SubFolders.Count>0)

        {

            foreach (SPFolder iFolder in folder.SubFolders)

            {

                if (GetFileFormFolder(iFolder, regular)!=null)

                {

                    return GetFileFormFolder(iFolder, regular);

                }

            }

        }

        return null;

    }