Exists 方法 .NET Framework 类库 Directory..::.Exists 方法 确定给定路径是否引用磁盘上的现有目录。 命名空间: System.IO 程序集: mscorlib(在 mscorlib.dll 中) 示例// For File.Exists, Directory.Exists using System; using System.IO; using System.Collections;public class RecursiveFileProcessor { public static void Main(string[] args) { foreach(string path in args) { if(File.Exists(path)) { // This path is a file ProcessFile(path); } else if(Directory.Exists(path)) { // This path is a directory ProcessDirectory(path); } else { Console.WriteLine("{0} is not a valid file or directory.", path); } } } // Process all files in the directory passed in, recurse on any directories // that are found, and process the files they contain. public static void ProcessDirectory(string targetDirectory) { // Process the list of files found in the directory. string [] fileEntries = Directory.GetFiles(targetDirectory); foreach(string fileName in fileEntries) ProcessFile(fileName); // Recurse into subdirectories of this directory. string [] subdirectoryEntries = Directory.GetDirectories(targetDirectory); foreach(string subdirectory in subdirectoryEntries) ProcessDirectory(subdirectory); } // Insert logic for processing found files here. public static void ProcessFile(string path) { Console.WriteLine("Processed file '{0}'.", path); } }
Exists 确定给定路径是否引用磁盘上的现有目录。 if (Directory.Exists(path)) { Console.WriteLine("That path exists already."); return; } // Try to create the directory. DirectoryInfo di = Directory.CreateDirectory(path); Console.WriteLine("The directory was created successfully at {0}.", Directory.GetCreationTime(path)); // Delete the directory. di.Delete(); Console.WriteLine("The directory was deleted successfully.");
.NET Framework 类库
Directory..::.Exists
方法 确定给定路径是否引用磁盘上的现有目录。
命名空间: System.IO
程序集: mscorlib(在 mscorlib.dll 中) 示例// For File.Exists, Directory.Exists
using System;
using System.IO;
using System.Collections;public class RecursiveFileProcessor
{
public static void Main(string[] args)
{
foreach(string path in args)
{
if(File.Exists(path))
{
// This path is a file
ProcessFile(path);
}
else if(Directory.Exists(path))
{
// This path is a directory
ProcessDirectory(path);
}
else
{
Console.WriteLine("{0} is not a valid file or directory.", path);
}
}
}
// Process all files in the directory passed in, recurse on any directories
// that are found, and process the files they contain.
public static void ProcessDirectory(string targetDirectory)
{
// Process the list of files found in the directory.
string [] fileEntries = Directory.GetFiles(targetDirectory);
foreach(string fileName in fileEntries)
ProcessFile(fileName); // Recurse into subdirectories of this directory.
string [] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
foreach(string subdirectory in subdirectoryEntries)
ProcessDirectory(subdirectory);
} // Insert logic for processing found files here.
public static void ProcessFile(string path)
{
Console.WriteLine("Processed file '{0}'.", path);
}
}
原文地址:http://technet.microsoft.com/zh-cn/sysinternals/system.io.directory.exists.aspx 经常上去看看微软挺好 经常都会给一些示例代码
{
Console.WriteLine("That path exists already.");
return;
} // Try to create the directory.
DirectoryInfo di = Directory.CreateDirectory(path);
Console.WriteLine("The directory was created successfully at {0}.", Directory.GetCreationTime(path)); // Delete the directory.
di.Delete();
Console.WriteLine("The directory was deleted successfully.");
{
if (fileUpload.HasFile)
{
string savePath = Server.MapPath("~/upload/");
if (!System.IO.Directory.Exists(savePath))
{
System.IO.Directory.CreateDirectory(savePath);
}
savePath = savePath + "\\" + fileUpload.FileName;
fileUpload.SaveAs(savePath);//保存文件
}
}
{
// string errorDirectory = @"D:\Program Files\error_salary"; //如果该目录不存在将创建
string errorPath = @"D:\Program Files\error_salary" + "\\" + fileName +".txt";
//start access file
if (!System.IO.File.Exists(errorPath))
{
// Create a file to write to.
using (System.IO.StreamWriter sw = System.IO.File.CreateText(errorPath))
{
sw.WriteLine( exceptionString ); //将导常写入文件.
}
}
else
{
// This text is always added, making the file longer over time
// if it is not deleted.
using (System.IO.StreamWriter sw2 = System.IO.File.AppendText(errorPath))
{
sw2.WriteLine();
// sw.WriteLine(sqlTable);
sw2.WriteLine(DateTime.Now + " ");
sw2.WriteLine( exceptionString );
}
}
//end }
catch (Exception ec)
{
Console.WriteLine(ec.ToString());
}
{
// string errorDirectory = @"D:\Program Files\error_salary"; //如果该目录不存在将创建
string errorPath = @"D:\Program Files\error_salary" + "\\" + fileName +".txt";
//start access file
if (!System.IO.File.Exists(errorPath))
{
// Create a file to write to.
using (System.IO.StreamWriter sw = System.IO.File.CreateText(errorPath))
{
sw.WriteLine( exceptionString ); //将导常写入文件.
}
}
else
{
// This text is always added, making the file longer over time
// if it is not deleted.
using (System.IO.StreamWriter sw2 = System.IO.File.AppendText(errorPath))
{
sw2.WriteLine();
// sw.WriteLine(sqlTable);
sw2.WriteLine(DateTime.Now + " ");
sw2.WriteLine( exceptionString );
}
}
//end }
catch (Exception ec)
{
Console.WriteLine(ec.ToString());
}