Create\Move\Delte Folder\File

        /// <summary>
        /// 从一个目录将其内容移动到另一目录
        /// </summary>
        /// <param name="p">源目录</param>
        /// <param name="p_2">目的目录</param>
        private void MoveFolderTo(string p, string p_2)
        {
            //检查是否存在目的目录
            if (!Directory.Exists(p_2))
                Directory.CreateDirectory(p_2);
            //先来移动文件
            DirectoryInfo info = new DirectoryInfo(p);
            FileInfo[] files = info.GetFiles();
            foreach (FileInfo file in files)
            {
                File.Copy(Path.Combine(p,file.Name), Path.Combine(p_2, file.Name), true); //复制文件
            }
            
        }

        private void btnBegin_Click(object sender, EventArgs e)
        {
            this.MoveFolderTo("D:\\HSCIS_log","D:\\HSCIS_log\\1");
            return;

            #region

            //C#文件创建、移动、删除、复制
            /*
            //1.---------文件夹创建、移动、删除---------

//创建文件夹
Directory.CreateDirectory(Server.MapPath("a"));
Directory.CreateDirectory(Server.MapPath("b"));
Directory.CreateDirectory(Server.MapPath("c"));
//移动b到a
Directory.Move(Server.MapPath("b"), Server.MapPath("a\\b"));
//删除c
Directory.Delete(Server.MapPath("c"));

//2.---------文件创建、复制、移动、删除---------

//创建文件
//使用File.Create创建再复制/移动/删除时会提示：文件正由另一进程使用,因此该进程无法访问该文件
//改用 FileStream 获取 File.Create 返回的 System.IO.FileStream 再进行关闭就无此问题
FileStream fs;
fs = File.Create(Server.MapPath("a.txt"));
fs.Close();
fs = File.Create(Server.MapPath("b.txt"));
fs.Close();
fs = File.Create(Server.MapPath("c.txt"));
fs.Close();
//复制文件
File.Copy(Server.MapPath("a.txt"), Server.MapPath("a\\a.txt"));
//移动文件
File.Move(Server.MapPath("b.txt"), Server.MapPath("a\\b.txt"));
File.Move(Server.MapPath("c.txt"), Server.MapPath("a\\c.txt"));
//删除文件
File.Delete(Server.MapPath("a.txt"));

//3.---------遍历文件夹中的文件和子文件夹并显示其属性---------

if(Directory.Exists(Server.MapPath("a")))
{
     //所有子文件夹
     foreach(string item in Directory.GetDirectories(Server.MapPath("a")))
     {
         Response.Write("<b>文件夹：" + item + "</b><br/>");
         DirectoryInfo directoryinfo = new DirectoryInfo(item);
         Response.Write("名称：" + directoryinfo.Name + "<br/>");
         Response.Write("路径：" + directoryinfo.FullName + "<br/>");
         Response.Write("创建时间：" + directoryinfo.CreationTime + "<br/>");
         Response.Write("上次访问时间：" + directoryinfo.LastAccessTime + "<br/>");
         Response.Write("上次修改时间：" + directoryinfo.LastWriteTime + "<br/>");
         Response.Write("父文件夹：" + directoryinfo.Parent + "<br/>");
         Response.Write("所在根目录：" + directoryinfo.Root + "<br/>");
         Response.Write("<br/>");
     }

     //所有子文件
     foreach (string item in Directory.GetFiles(Server.MapPath("a")))
     {
         Response.Write("<b>文件：" + item + "</b><br/>");
         FileInfo fileinfo = new FileInfo(item);
         Response.Write("名称：" + fileinfo.Name + "<br/>");
         Response.Write("扩展名：" + fileinfo.Extension +"<br/>");
         Response.Write("路径：" + fileinfo.FullName +"<br/>");
         Response.Write("大小：" + fileinfo.Length +"<br/>");
         Response.Write("创建时间：" + fileinfo.CreationTime +"<br/>");
         Response.Write("上次访问时间：" + fileinfo.LastAccessTime +"<br/>");
         Response.Write("上次修改时间：" + fileinfo.LastWriteTime +"<br/>");
         Response.Write("所在文件夹：" + fileinfo.DirectoryName +"<br/>");
         Response.Write("文件属性：" + fileinfo.Attributes +"<br/>");
         Response.Write("<br/>");
     }
}

//4.---------文件读写---------

if (File.Exists(Server.MapPath("a\\a.txt")))
{
     StreamWriter streamwrite = new StreamWriter(Server.MapPath("a\\a.txt"));
     streamwrite.WriteLine("木子屋");
     streamwrite.WriteLine("http://www.mzwu.com/");
     streamwrite.Write("2008-04-13");
     streamwrite.Close();

     StreamReader streamreader = new StreamReader(Server.MapPath("a\\a.txt"));
     Response.Write(streamreader.ReadLine());
     Response.Write(streamreader.ReadToEnd());
     streamreader.Close();
}

获取文件的版本信息:
FileVersionInfo myFileVersionInfo1 = FileVersionInfo.GetVersionInfo("D:\\TEST.DLL");
textBox1.Text="版本号: " + myFileVersionInfo1.FileVersion;

更改文件属性，删除只读文件：

　　下例欲将E:\test.txt文件拷贝至D:\tmp\test.txt,但D:\tmp\test.txt已经存在。

//File.Copy(sourceFile,destinationFile,true); 用来拷贝文件
//当destinationFile已经存在时，无法将文件file1拷贝到目标文件，
//因此先删除destination文件，File.Delete()方法不能删除只读文件，
//因此，如果文件属性为只读(Attributes属性中会包含有"ReadOnly")，
//先把文件属性重置为Normal,然后再删除:
string file1="E:\\test.txt";
string destinationFile="d:\\tmp\\test.txt";
if(File.Exists(destinationFile))
{
　FileInfo fi=new FileInfo(destinationFile);
　if(fi.Attributes.ToString().IndexOf("ReadOnly")!=-1)
　　fi.Attributes=FileAttributes.Normal;
　　File.Delete(destinationFile);
}
File.Copy(file1,destinationFile,true);

判断文件是否存在:File.Exists(string filePath)

　　判断目录是否存在:Directory.Exists("D:\\LastestVersion")

　　按行读取文件：

int fileCount=0;
// Open the file just specified such that no one else can use it.
StreamReader sr = new StreamReader(textBox1.Text.Trim());
while(sr.Peek() > -1)//StreamReader.Peek()返回下一个可用字符，但不使用它
{
　listBox1.Items.Add(sr.ReadLine());
　fileCount++;
}
sr.Close();

按行写入文件：
StreamWriter sw = new StreamWriter("D:\\result.txt");
for(int i=0;i<10;i++)
{
　sw.WriteLine("这是第"+i.ToString()+"行数据");
}

C#追加文件
StreamWriter sw = File.AppendText(Server.MapPath(".")+"\\myText.txt");
sw.WriteLine("追逐理想");
sw.WriteLine("kzlll");
sw.WriteLine(".NET笔记");
sw.Flush();
sw.Close();

C#拷贝文件
string OrignFile,NewFile;
OrignFile = Server.MapPath(".")+"\\myText.txt";
NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
File.Copy(OrignFile,NewFile,true);

C#删除文件
string delFile = Server.MapPath(".")+"\\myTextCopy.txt";
File.Delete(delFile);

C#移动文件
string OrignFile,NewFile;
OrignFile = Server.MapPath(".")+"\\myText.txt";
NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
File.Move(OrignFile,NewFile);

C#创建目录
// 创建目录c:\sixAge
DirectoryInfo d=Directory.CreateDirectory("c:\\sixAge");
// d1指向c:\sixAge\sixAge1
DirectoryInfo d1=d.CreateSubdirectory("sixAge1");
// d2指向c:\sixAge\sixAge1\sixAge1_1
DirectoryInfo d2=d1.CreateSubdirectory("sixAge1_1");
// 将当前目录设为c:\sixAge
Directory.SetCurrentDirectory("c:\\sixAge");
// 创建目录c:\sixAge\sixAge2
Directory.CreateDirectory("sixAge2");
// 创建目录c:\sixAge\sixAge2\sixAge2_1
Directory.CreateDirectory("sixAge2\\sixAge2_1");

递归删除文件夹及文件
<%@ Page Language=C#%>
<%@ Import namespace="System.IO"%>
<Script runat=server>
public void DeleteFolder(string dir)
{
    if (Directory.Exists(dir)) //如果存在这个文件夹删除之
    {
        foreach(string d in Directory.GetFileSystemEntries(dir))
        {
            if(File.Exists(d))
                File.Delete(d); //直接删除其中的文件
            else
                DeleteFolder(d); //递归删除子文件夹
        }
        Directory.Delete(dir); //删除已空文件夹
        Response.Write(dir+" 文件夹删除成功");
    }
    else
        Response.Write(dir+" 该文件夹不存在"); //如果文件夹不存在则提示
}

protected void Page_Load (Object sender ,EventArgs e)
{
    string Dir="D:\\gbook\\11";
    DeleteFolder(Dir); //调用函数删除文件夹
}


            */

            #endregion


            //Create文件夾
            string l_strAttachPath = ConfigurationSettings.AppSettings["AttachmentPath"]; ;
            string l_strFileSource = "", l_strFinalPath = "" ;
            if (l_strAttachPath.Substring(l_strAttachPath.Length - 1, 1) != "\\")
                l_strAttachPath += "\\";

            if (!Directory.Exists(l_strAttachPath))
            {
                Directory.CreateDirectory(l_strAttachPath);
            }

            //Copy file
            File.Copy(l_strFileSource, l_strAttachPath);

            //是否存在file
            if (File.Exists(l_strFinalPath + "FileName"))
            {
                //delete file
                File.Delete(l_strFinalPath + "FileName");
            }
            // move file
            File.Move(l_strFileSource, l_strFinalPath + "FileName");




        }