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#文件搜索小程序_第1张图片

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:

C#文件搜索小程序_第2张图片

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。

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