场景
C#中File类的常用读取与写入文件方法的使用：
注：
实现
获取文件的扩展名
/// <summary>
/// 获取文件的扩展名
/// </summary>
/// <param name="filename">完整文件名</param>
/// <returns>返回扩展名</returns>
public static string GetPostfixStr(string filename)
{
int num = filename.LastIndexOf(".");
int length = filename.Length;
return filename.Substring(num, length - num);
}
读取文件内容
/// <summary>
/// 读取文件内容
/// </summary>
/// <param name="path">要读取的文件路径</param>
/// <returns>返回文件内容</returns>
public static string ReadFile(string path)
{
string result;
if (!System.IO.File.Exists(path))
{
result = "不存在相应的目录";
}
else
{
System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, System.Text.Encoding.Default);
result = streamReader.ReadToEnd();
streamReader.Close();
streamReader.Dispose();
}
return result;
}
指定编码格式读取文件内容
/// <summary>
/// 读取文件内容
/// </summary>
/// <param name="path">要读取的文件路径</param>
/// <param name="encoding">编码格式</param>
/// <returns>返回文件内容</returns>
public static string ReadFile(string path, System.Text.Encoding encoding)
{
string result;
if (!System.IO.File.Exists(path))
{
result = "不存在相应的目录";
}
else
{
System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, encoding);
result = streamReader.ReadToEnd();
streamReader.Close();
streamReader.Dispose();
}
return result;
}
向指定文件写入内容
/// <summary>
/// 向指定文件写入内容
/// </summary>
/// <param name="path">要写入内容的文件完整路径</param>
/// <param name="content">要写入的内容</param>
public static void WriteFile(string path, string content)
{
try
{
object obj = new object();
if (!System.IO.File.Exists(path))
{
System.IO.FileStream fileStream = System.IO.File.Create(path);
fileStream.Close();
}
lock (obj)
{
using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, System.Text.Encoding.Default))
{
streamWriter.WriteLine(content);
streamWriter.Close();
streamWriter.Dispose();
}
}
}
catch (System.Exception ex)
{
ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("写入文件{0}异常:{1}", path, ex.Message), ex);
}
}
指定编码格式向文件写入内容
/// <summary>
/// 向指定文件写入内容
/// </summary>
/// <param name="path">要写入内容的文件完整路径</param>
/// <param name="content">要写入的内容</param>
/// <param name="encoding">编码格式</param>
public static void WriteFile(string path, string content, System.Text.Encoding encoding)
{
try
{
object obj = new object();
if (!System.IO.File.Exists(path))
{
System.IO.FileStream fileStream = System.IO.File.Create(path);
fileStream.Close();
}
lock (obj)
{
using (System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(path, false, encoding))
{
streamWriter.WriteLine(content);
streamWriter.Close();
streamWriter.Dispose();
}
}
}
catch (System.Exception ex)
{
ICSharpCode.Core.LoggingService<FileHelper>.Error(String.Format("写入文件{0}异常:{1}", path, ex.Message), ex);
}
}
文件复制
/// <summary>
/// 文件复制
/// </summary>
/// <param name="orignFile">源文件完整路径</param>
/// <param name="newFile">目标文件完整路径</param>
public static void FileCoppy(string orignFile, string newFile)
{
System.IO.File.Copy(orignFile, newFile, true);
}
文件删除
/// <summary>
/// 删除文件
/// </summary>
/// <param name="path">要删除的文件的完整路径</param>
public static void FileDel(string path)
{
System.IO.File.Delete(path);
}
文件移动
/// <summary>
/// 文件移动（剪贴->粘贴）
/// </summary>
/// <param name="orignFile">源文件的完整路径</param>
/// <param name="newFile">目标文件完整路径</param>
public static void FileMove(string orignFile, string newFile)
{
System.IO.File.Move(orignFile, newFile);
}
判断一组文件是否都存在
/// <summary>
/// 判断一组文件是否都存在
/// </summary>
/// <param name="filePathList">文件路径List</param>
/// <returns>文件是否全部存在</returns>
public static bool IsFilesExist(List<string> filePathList)
{
bool isAllExist = true;
foreach(string filePath in filePathList)
{
if(!File.Exists(filePath))
{
isAllExist = false;
}
}
return isAllExist;
}
创建目录
/// <summary>
/// 创建目录
/// </summary>
/// <param name="orignFolder">当前目录</param>
/// <param name="newFloder">要创建的目录名</param>
public static void FolderCreate(string orignFolder, string newFloder)
{
System.IO.Directory.SetCurrentDirectory(orignFolder);
System.IO.Directory.CreateDirectory(newFloder);
}
删除目录
/// <summary>
/// 删除目录
/// </summary>
/// <param name="dir">要删除的目录</param>
public static void DeleteFolder(string dir)
{
if (System.IO.Directory.Exists(dir))
{
string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(dir);
for (int i = 0; i < fileSystemEntries.Length; i++)
{
string text = fileSystemEntries[i];
if (System.IO.File.Exists(text))
{
System.IO.File.Delete(text);
}
else
{
FileHelper.DeleteFolder(text);
}
}
System.IO.Directory.Delete(dir);
}
}
目录内容复制
/// <summary>
/// 目录内容复制
/// </summary>
/// <param name="srcPath">源目录</param>
/// <param name="aimPath">目标目录</param>
public static void CopyDir(string srcPath, string aimPath)
{
try
{
if (aimPath[aimPath.Length - 1] != System.IO.Path.DirectorySeparatorChar)
{
aimPath += System.IO.Path.DirectorySeparatorChar;
}
if (!System.IO.Directory.Exists(aimPath))
{
System.IO.Directory.CreateDirectory(aimPath);
}
string[] fileSystemEntries = System.IO.Directory.GetFileSystemEntries(srcPath);
string[] array = fileSystemEntries;
for (int i = 0; i < array.Length; i++)
{
string text = array[i];
if (System.IO.Directory.Exists(text))
{
FileHelper.CopyDir(text, aimPath + System.IO.Path.GetFileName(text));
}
else
{
System.IO.File.Copy(text, aimPath + System.IO.Path.GetFileName(text), true);
}
}
}
catch (System.Exception ex)
{
throw new System.Exception(ex.ToString());
}
}
