运用递归算法实现文件搜索

　通过引用命名空间　System.IO　可以方便地使用文件操作的相关类

　本例所用到的类:directory

 先上代码:

首先声明全局变量Comleted

bool Comleted =false;

有什么用?先看主体代码:

        private void SearchFile(string directory, string tofindfile)
        {
            if (<span style="font-size: 13.3333px; line-height: 24px; font-family: 宋体;">Completed </span>== true) return;//结束记号
            string[] Filepaths;
            try
            {
                Filepaths = Directory.GetFiles(directory);
            }
            catch
            {
                return;
            }


            foreach (string filepath in Filepaths)
            {
                FileInfo file = new FileInfo(filepath);
                label1.Text = "正在搜索:" + filepath;
<span style="font-family: 宋体; line-height: 1.8; font-size: 12px;"><span style="white-space:pre">			</span>if (file.Name.Contains(tofindfile))</span>
                {
                    MessageBox.Show("找到了!");
                    Completed = true;
                    return;
                }


            }


            foreach (string dirname in Directory.GetDirectories(directory))
            {
<span style="white-space:pre">			</span>//对于根目录下的子目录,递归进行搜索
                SearchFile(dirname, tofindfile);
            }
            label1.Text = "Over";
        }