C#文件搜索小程序

今天突发奇想，想做一个窗口程序，要求达到如下目标：

1. 列出当前目录下的所有文件夹及所有文件，包含子目录及子文件。
2. 能够找出名字包含制定字符串的文件。
3. 删除操作。

其实以前用java已经基本实现，但是做出来的jar程序只能自己用，别人用需要安装jre或者jdk，现在一般人的电脑很少安装java的，而net.framework安装的人还是不少。所以决定用vs c#做一个同样的程序。

由于c#使用经历尚浅，权当入门练习了。

c#对文件的操作主要由FileInfo、File、DirectoryInfo和Directory来完成

要使用这四个类，首先要

using System;using System.IO;

按照我初步的理解，FileInfo和DirectoryInfo的方法是动态的，而File和Directory则可以提供静态方法。

下面记录编写过程中学到的几个比较有用的方法：

String path = System.AppDomain.CurrentDomain.BaseDirectory;//获取当前应用所在的目录

//// Summary://     Returns the subdirectories of the current directory.//// Parameters://   searchPattern://     The search string. For example, "System*" can be used to search for all directories//     that begin with the word "System".////   searchOption://     One of the enumeration values that specifies whether the search operation//     should include only the current directory or all subdirectories.//// Returns://     An array of System.IO.DirectoryInfo objects.//// Exceptions://   System.IO.DirectoryNotFoundException://     The path encapsulated in the System.IO.DirectoryInfo object is invalid, such//     as being on an unmapped drive.////   System.Security.SecurityException://     The caller does not have the required permission.////   System.UnauthorizedAccessException://     The caller does not have the required permission.     public DirectoryInfo[] GetDirectories();public DirectoryInfo[] GetDirectories(string searchPattern);public DirectoryInfo[] GetDirectories(string searchPattern, SearchOption searchOption);

//// Summary://     Returns a file list from the current directory matching the given search//     pattern and using a value to determine whether to search subdirectories.//// Parameters://   searchPattern://     The search string. For example, "System*" can be used to search for all directories//     that begin with the word "System".////   searchOption://     One of the enumeration values that specifies whether the search operation//     should include only the current directory or all subdirectories.//// Returns://     An array of type System.IO.FileInfo.//// Exceptions://   System.ArgumentException://     searchPattern contains one or more invalid characters defined by the System.IO.Path.GetInvalidPathChars()//     method.////   System.ArgumentNullException://     searchPattern is null.////   System.ArgumentOutOfRangeException://     searchOption is not a valid System.IO.SearchOption value.////   System.IO.DirectoryNotFoundException://     The path is invalid (for example, it is on an unmapped drive).////   System.Security.SecurityException://     The caller does not have the required permission.public FileInfo[] GetFiles();public FileInfo[] GetFiles(string searchPattern);public FileInfo[] GetFiles(string searchPattern, SearchOption searchOption);

//排除回收站里面的文件if (!item.FullName.Contains("$RECYCLE.BIN")){    //Code}

//调用系统程序打开文件System.Diagnostics.Process.Start("explorer.exe", flist.SelectedItem.ToString());//添加 "/select,"以后，explorer会打开文件所在目录并默认选中该文件System.Diagnostics.Process.Start("explorer.exe", "/select," + flist.SelectedItem.ToString());

//获取当前目录的父目录String fatherPath = new FileInfo(flist.SelectedItem.ToString()).DirectoryName;System.Diagnostics.Process.Start("explorer.exe", fatherPath);

//删除多个文件foreach (String itemName in flist.SelectedItems) {    FileInfo fi = new FileInfo(itemName);    fi.Delete();}

//系统确认窗口if (MessageBox.Show("确定删除？", "删除操作不可恢复", MessageBoxButtons.YesNo) == DialogResult.Yes) {}

实际效果图如下：

因为程序本身非常简单，所以难点只有这么多，搞明白以后，剩下的就是对UI的不断调整美化，以及对VS慢慢的熟悉过程。