FileFilter 遍历某个目录下文件名含有某个字符的文件

由于IIS版本的升级，造成了文件名中含有“+”的特殊字符的文件（多数是图片）在网页中不能被访问，于是必须查找当前目录下含有多少这样的文件，从而制定最佳的解决方案。

废话少说，直接上核心代码：

        public void GetAllFilesInDirectory(string strDirectory, string searchCh)
        {
            DirectoryInfo directory = new DirectoryInfo(strDirectory);
            DirectoryInfo[] directoryArray = directory.GetDirectories();
            FileInfo[] fileInfoArray = directory.GetFiles();
            foreach (var item in fileInfoArray)
            {
                if (item.Name.IndexOf(searchCh) > -1)
                {
                    ... ...
                }
            }
            foreach (DirectoryInfo _directoryInfo in directoryArray)
            {
                DirectoryInfo directoryA = new DirectoryInfo(_directoryInfo.FullName);
                TreeNode nodeChild = new TreeNode(directoryA.Name);
                DirectoryInfo[] directoryArrayA = directoryA.GetDirectories();
                FileInfo[] fileInfoArrayA = directoryA.GetFiles();
                GetAllFilesInDirectory(_directoryInfo.FullName, searchCh);
            }
        }

下面是我做的一个实例，界面是winform