asp.net文件操作小例子(创建文件夹,读,写,删)

asp.net文件操作小例子(创建文件夹,读,写,删)

静态生成要在虚拟目录下创建文件夹 来保存生成的页面 那么就要对文件进行操作

一、创建文件夹

using System.IO;

string name = "aa";

string path = Server.MapPath("") + "\\" + name;

if (Directory.Exists(path))

{

Response.Write("<script>alert('文件夹已存在了!');history.go(-1);</script>");

}

else

{

DirectoryInfo folder=Directory.CreateDirectory(path);

string time = Convert.ToString(Directory.GetCreationTime(path));

string foldername = name.Substring(name.LastIndexOf("\\") + 1);

Response.Write("添加成功!");

Response.Write("添加时间："+time);

Response.Write("文件夹名："+foldername);

}

二、删除文件夹

using System.IO;

string name = "aa";

string path = Server.MapPath("") + "\\" + name;

if (Directory.Exists(path))

{

Directory.Delete(path);

Response.Write("删除成功!");

}

else

{

Response.Write("<script>alert('文件夹不存在!');history.go(-1);</script>");

}

三、文件夹的移动



string name1 = "aa";

string name2 = "bb\\aa";

//移动到的文件夹里,把AA移动到BB里

string path1 = Server.MapPath("") + "\\" + name1;

string path2 = Server.MapPath("") + "\\" + name2;

if (!Directory.Exists(path1))

{

Response.Write("<script>alert('文件夹"+name1+"不存在!');history.go(-1);</script>");

return;

}

if (Directory.Exists(path2))

{

Response.Write("<script>alert('文件夹" + name2 + "已存在!');history.go(-1);</script>");

return;

}

try

{

Directory.Move(path1, path2);

Response.Write("文件夹移动成功!");

}

catch

{

Response.Write("<script>alert('必须在同一目录下操作!');history.go(-1);</script>");

}

四、获取文件夹下的文件列表

前台

<asp:ListBox ID="list" runat="server" Width="200px" Height="300px" Visible="false"></asp:ListBox>

后台

string name = "aa";

string path = Server.MapPath("") + "\\" + name;

if (!Directory.Exists(path))

{

list.Visible = false;

Response.Write("<script>alert('文件夹" + name + "不存在!');history.go(-1);</script>");

return;

}

else

{

DirectoryInfo foldinfo = new DirectoryInfo(path);

FileSystemInfo[] dirs = foldinfo.GetFileSystemInfos();

if (dirs.Length < 1)

{

Response.Write("<script>alert('文件夹中没数据!');history.go(-1);</script>");

return;

}

list.Visible = true;

list.DataSource = dirs;

list.DataBind();

}

五、创建文件

string name = "aa.aspx";

string path = Server.MapPath("") + "\\" + name;

if (File.Exists(path))

{

Response.Write("<script>alert('文件" + name + "已存在!');history.go(-1);</script>");

return;

}

else

{

FileStream fs = File.Create(path);

fs.Close();

Response.Write("文件" + name + "添加成功!");

}

六、拷贝文件

string name1 = "aa\\1.html";

string name2 = "bb\\1.html";

string path1 = Server.MapPath("") + "\\" + name1;

string path2 = Server.MapPath("") + "\\" + name2;

if (!File.Exists(path1))

{

Response.Write("<script>alert('文件" + name1 + "不存在!');history.go(-1);</script>");

return;

}

if (File.Exists(path2))

{

Response.Write("<script>alert('文件" + name2 + "已存在!');history.go(-1);</script>");

return;

}

try

{

File.Copy(path1, path2);

Response.Write("拷贝成功!");

}

catch

{

Response.Write("拷贝失败!");

}

七、移动文件

string name1 = "aa\\1.html";

string name2 = "bb\\1.html";

string path1 = Server.MapPath("") + "\\" + name1;

string path2 = Server.MapPath("") + "\\" + name2;

if (!File.Exists(path1))

{

Response.Write("<script>alert('文件" + name1 + "不存在!');history.go(-1);</script>");

return;

}

if (File.Exists(path2))

{

Response.Write("<script>alert('文件" + name2 + "已存在!');history.go(-1);</script>");

return;

}

try

{

File.Move(path1, path2);

Response.Write("移动成功!");

}

catch

{

Response.Write("移动失败!");

}

八、文件删除

string name = "bb\\1.html";

string path = Server.MapPath("") + "\\" + name;

if (!File.Exists(path))

{

Response.Write("<script>alert('文件" + name + "不存在!');history.go(-1);</script>");

return;

}

try

{

File.Delete(path);

Response.Write("删除成功!");

}

catch

{

Response.Write("删除失败!");

}

九、获取文件的详细信息

string name = "aa\\11.txt";

string path = Server.MapPath("") + "\\" + name;

if (!File.Exists(path))

{

Response.Write("<script>alert('文件" + name + "不存在!');history.go(-1);</script>");

return;

}

else

{

FileInfo file = new FileInfo(path);

string filexinxi1, filexinxi2, filexinxi3, filexinxi4, filexinxi5;

//文件路径

filexinxi1 = file.FullName;

//文件大小,字节

filexinxi2 = file.Length+"字节";

//文件属性

filexinxi3 = file.Attributes.ToString();

//文件创建时间

filexinxi4 = file.CreationTime.ToShortDateString();

//文件上次访问时间

filexinxi5 = file.LastAccessTime.ToShortDateString();

Response.Write("文件路径:"+filexinxi1+"<br>");

Response.Write("文件大小:" + filexinxi2 + "<br>");

Response.Write("文件属性:" + filexinxi3 + "<br>");

Response.Write("文件创建时间:" + filexinxi4 + "<br>");

Response.Write("文件上次访问时间:" + filexinxi5 + "<br>");

}

十、读取文件内容

string name = "aa\\11.html";

string path = Server.MapPath("") + "\\" + name;

FileInfo fi = new FileInfo(path);

//获取文件名

string filename = fi.Name;

//获取文件扩展名

string extension = fi.Extension;

//判断该文件是否为txt格式

if (extension != ".html")

{

Response.Write("<script>alert('请选择html格式文件!');history.go(-1);</script>");

return;

}

StreamReader sr = new StreamReader(path, System.Text.Encoding.Default);

Response.Write("文件中的内容如下:<br>");

Response.Write(sr.ReadToEnd());

sr.Close();

十一、文件的写入

string name = "aa\\11.html";

string content1="<html><title>大家好</title></html>";

string path = Server.MapPath("") + "\\" + name;

FileInfo fi = new FileInfo(path);

//获取文件名

string filename = fi.Name;

//获取文件扩展名

string extension = fi.Extension;

//判断该文件是否为txt格式

if (extension != ".html")

{

Response.Write("<script>alert('请选择html格式文件!');history.go(-1);</script>");

return;

}

StreamWriter sr = new StreamWriter(path, true, System.Text.Encoding.GetEncoding("gb2312"));

sr.WriteLine(content1);

sr.Close();

Response.Write("文件写入成功!");