C#中文件操作
文件相关操作
- 判断文件是否已经存在
File.Exists(MyFileName) 返回为Bool值
- 判断文件夹是否已经存在
Directory.Exists(MyFolderName) 返回为Bool值
- 获得当前程序信息
公司名称：Application.CompanyName
区域信息：Application.CurrentCulture
语言标志：Application.CurrentInputLanguage
产品名称：Application.ProductName
产品版本：Application.ProductVersion
- 得到父目录信息
DirectoryInfo myInfo=Directory.GetParent(MyFolderName)
- 显示根信息
Directory.GetDirectoryRoot(MyFolderName)
- 得到当前程序所在的文件夹
Directory.GetCurrentDirectory()
- 得到指定文件夹下的所有的文件
string[] MyFiles=Directory.GetFiles(MyFolderName)
- 得到指定文件夹下的所有子文件夹
string[] MyFolders=Directory.GetDirectories(MyFolderName)
- 删除文件夹
DirectoryInfo MyDir=new DirectoryInfo(MyFolderName);
if(MessageBox.Show(‘是否删除文件夹’+MyFolderName,”信息提示”,MessageBoxButtons.YesNo,MessageBoxIcon.Question)==DialogResult.Yes)
{
MyDir.Delete();
}
- 创建文件夹
Directory.CreateDirectory(MyFolderName)
- 以流的形式读取文件
StreamReader streamRead=null;
try{
streamRead=new StreamReader(MyFileName,System.Text.Encoding.Default)
}
catch(Exception ex)
{
MessageBox.Show(“读取文件发生错误”);
}
finally
{
if(streamRead!=null)
{
readStream.Close();
}
}
- 以流的形式写入文件
StreamWriter streamWriter=null;
try{
streamWriter=new StreamWriter(MyFileName,false,System.Text.Encoding.Default);
streamWriter.Write(Context); //Context为需要写入的内容
}
实例
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace _1FileOpen
{
class FileHelper
{
//类说明：该类提供文件相关操作
/// <summary>
/// 判断文件是否存在
/// </summary>
/// <param name="filePath">需要判断的文件名</param>
/// <returns>返回值</returns>
public static bool ExistFile(string filePath)
{
if (File.Exists(filePath))
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 判断文件夹是否存在
/// </summary>
/// <param name="folderPath">需要判断的文件夹名</param>
/// <returns>返回值</returns>
public static bool ExistDirectory(string folderPath)
{
if (Directory.Exists(folderPath))
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 得到父目录
/// </summary>
/// <param name="folderPath">子目录路径</param>
/// <returns>父目录信息</returns>
public static DirectoryInfo GetParentDirInfo(string folderPath)
{
return Directory.GetParent(folderPath);
}
/// <summary>
/// 得到指定目录下的所有文件
/// </summary>
/// <param name="folderPath">指定目录路径</param>
/// <returns>文件数组</returns>
public static string[] GetFiles(string folderPath)
{
string[] files = Directory.GetFiles(folderPath);
return files;
}
/// <summary>
/// 得到指定目录下的所有子文件夹
/// </summary>
/// <param name="folderPath">指定目录路径</param>
/// <returns>文件夹数组</returns>
public static string[] GetDirectories(string folderPath)
{
string[] directories=Directory.GetDirectories(folderPath);
return directories;
}
/// <summary>
/// 删除文件
/// </summary>
/// <param name="folderPath">文件路径</param>
/// <param name="isTrue">是否删除文件</param>
public static void DeleteFile(string folderPath,bool isTrue)
{
DirectoryInfo files = new DirectoryInfo(folderPath);
if (isTrue == true)
{
files.Delete();
}
}
/// <summary>
/// 移动文件
/// </summary>
/// <param name="sourcePath">原文件</param>
/// <param name="targetPath">目标文件</param>
public static void MoveFile(string sourcePath,string targetPath)
{
if (ExistFile(sourcePath) && !ExistFile(targetPath))
{
File.Move(sourcePath, targetPath);
}
}
/// <summary>
/// 创建文件夹
/// </summary>
/// <param name="filePath">需要创建的文件夹名称</param>
public static void CreateDirectory(string filePath)
{
Directory.CreateDirectory(filePath);
}
/// <summary>
/// 读取文件内容
/// </summary>
/// <param name="filePath">文件路径</param>
/// <returns>返回读取的内容</returns>
public static string ReadFile(string filePath)
{
StreamReader streamRead = null;
streamRead=new StreamReader(filePath,Encoding.Default);
string context = streamRead.ReadToEnd();
streamRead.Close();
return context;
}
/// <summary>
/// 写入文件内容
/// </summary>
/// <param name="filePath">文件路径</param>
/// <param name="context"></param>
public static void WriteFile(string filePath,string context)
{
if (filePath != null)
{
StreamWriter streamWriter = new StreamWriter(filePath, false, Encoding.Default);
streamWriter.Write(context);
streamWriter.Close();
}
}
}
}
