asp.net中操作ftp的方法
有的时候我们上传东西不想传到web目录而是ftp服务器，这样可以不占用服务器宝贵空间，以前发过一个tips中提到利用ftpsupport.dll操作ftp的方法，可能当时没有说清楚，网友要求给个清楚的例子，就随便写了个文件可以上传，下载，删除ftp上的文件：首先，dll 点击 这里 下载，别忘记给项目添加引用
test.aspx:
Test
\
test.aspx.cs:
using System;
using System.Collections;
using System.Configuration;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace FtpTest
{
///
/// Test 的摘要说明。
///
public class Test : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btn_upload;
protected System.Web.UI.HtmlControls.HtmlInputFile file1;
protected System.Web.UI.WebControls.TextBox tb_Dir;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
SetBind();
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///
private void InitializeComponent()
{
this.btn_upload.Click += new System.EventHandler(this.btn_upload_Click);
this.DataGrid1.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_ItemCommand);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void SetBind()
{
SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["strconn"]);
SqlDataAdapter da=new SqlDataAdapter("select * from FTP order by FilePath",conn);
DataSet ds=new DataSet();
da.Fill(ds);
this.DataGrid1.DataSource=ds;
this.DataGrid1.DataBind();
}
private void btn_upload_Click(object sender, System.EventArgs e)
{
FtpClass ftp=new FtpClass();
string filedownloadname=ftp.FtpUpload(this.file1.PostedFile,this.tb_Dir.Text);
string [] arrs=file1.PostedFile.FileName.Split('\\');
string filename=arrs;
SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["strconn"]);
SqlCommand comm=new SqlCommand("insert into FTP (FileName,FileDownloadName,FilePath,FileSize,UploadTime) values (@filename,@filedownloadname,@filepath,@filesize,@uploadtime)",conn);
SqlParameter parm1=new SqlParameter("@filename",SqlDbType.NVarChar,50);
parm1.Value=filename;
SqlParameter parm2=new SqlParameter("@filedownloadname",SqlDbType.NVarChar,50);
parm2.Value=filedownloadname;
SqlParameter parm3=new SqlParameter("@filepath",SqlDbType.NVarChar,50);
parm3.Value=this.tb_Dir.Text;
SqlParameter parm4=new SqlParameter("@filesize",SqlDbType.Int);
parm4.Value=this.file1.PostedFile.ContentLength/1024;
SqlParameter parm5=new SqlParameter("@uploadtime",SqlDbType.DateTime);
parm5.Value=DateTime.Now.ToString();
comm.Parameters.Add(parm1);
comm.Parameters.Add(parm2);
comm.Parameters.Add(parm3);
comm.Parameters.Add(parm4);
comm.Parameters.Add(parm5);
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
SetBind();
}
private void DataGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
if(e.CommandName=="Del")
{
FtpClass ftp=new FtpClass();
ftp.FileDel(e.Item.Cells.Text,e.Item.Cells.Text);
SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["strconn"]);
SqlCommand comm=new SqlCommand("delete from FTP where AutoID=@autoid",conn);
SqlParameter parm1=new SqlParameter("@autoid",SqlDbType.NVarChar,50);
parm1.Value=this.DataGrid1.DataKeys;
comm.Parameters.Add(parm1);
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
SetBind();
}
if(e.CommandName=="Download")
{
FtpClass ftp=new FtpClass();
ftp.FtpDownload(HttpContext.Current,e.Item.Cells.Text,e.Item.Cells.Text);
}
}
}
}
FtpClass.cs:
using System;
using System.Configuration;
using System.IO;
using FtpSupport;
using Microsoft.Win32;
using System.Web;
namespace FtpTest
{
public class FtpClass
{
private string FtpIP=ConfigurationSettings.AppSettings["FtpIP"];
private string FtpUserName=ConfigurationSettings.AppSettings["FtpUserName"];
private string FtpPassord=ConfigurationSettings.AppSettings["FtpPassWord"];
private FtpConnection ftp;
private FtpConnection FtpConn()
{
ftp=new FtpConnection();
ftp.Connect(this.FtpIP,this.FtpUserName,this.FtpPassord);
return ftp;
}
private string GetFileExtName(string filename,bool withdot)
{
string [] arrs=filename.Split('.');
int i=arrs.Length;
return withdot?"."+arrs.ToString():arrs.ToString();
}
private string GetFileContentType(string filedownloadname)
{
string DEFAULT_CONTENT_TYPE = "application/unknown";
RegistryKey regkey,fileextkey;
string FileContentType;
try
{
regkey=Registry.ClassesRoot;
fileextkey=regkey.OpenSubKey(this.GetFileExtName(filedownloadname,false));
FileContentType=fileextkey.GetValue("Content Type",DEFAULT_CONTENT_TYPE).ToString();
}
catch
{
FileContentType=DEFAULT_CONTENT_TYPE;
}
return FileContentType;
}
public string FtpUpload(HttpPostedFile file,string dir)
{
string FileDownloadName=DateTime.Now.ToString("yyyyMMddhhmmss")+this.GetFileExtName(file.FileName,true);
FtpConnection ftp=this.FtpConn();
if(ftp.DirectoryExist(dir))
ftp.SetCurrentDirectory(dir);
else
{
ftp.CreateDirectory(dir);
ftp.SetCurrentDirectory(dir);
}
ftp.PutStream(file.InputStream,FileDownloadName);
ftp.Close();
return FileDownloadName;
}
public void FileDel(string filedownloadname,string dir)
{
FtpConnection ftp=this.FtpConn();
if(ftp.DirectoryExist(dir))
{
ftp.SetCurrentDirectory(dir);
if(ftp.FileExist(filedownloadname))
{
ftp.DeleteFile(filedownloadname);
}
}
ftp.Close();
}
public void FtpDownload(HttpContext context,string filedownloadname,string dir)
{
context.Response.Clear();
context.Response.AddHeader("Content-Disposition", "attachment; filename="+filedownloadname);
context.Response.ContentType=this.GetFileContentType(filedownloadname);
FtpConnection ftp=this.FtpConn();
ftp.SetCurrentDirectory(dir);
if(ftp.FileExist(filedownloadname))
{
FtpStream ftpfs=ftp.OpenFile(filedownloadname,GenericRights.Read);
byte [] buffer=new byte;
int n=ftpfs.Read(buffer,0,buffer.Length);
while(n>0)
{
context.Response.BinaryWrite(buffer);
n=ftpfs.Read(buffer,0,buffer.Length);
}
Response.End();
ftpfs.Close();
}
else
{
context.Response.Write("alert('file does not exist!');");
}
ftp.Close();
}
}
}
这个dll在获取ftp文件列表方便存在些问题，等我修改下会放出一个改进版本，所以暂时用数据库保存ftp文件列表先将就下：
数据库：
if exists (select * from dbo.sysobjects where id = object_id(N'.') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table .
GO
CREATE TABLE . (
(50) COLLATE Chinese_PRC_CI_AS NOT NULL ,
(50) COLLATE Chinese_PRC_CI_AS NULL ,
(50) COLLATE Chinese_PRC_CI_AS NULL ,
(50) COLLATE Chinese_PRC_CI_AS NULL ,
NULL ,
NULL
) ON
GO
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