asp.net中操作ftp的方法
2011-09-02 10:16
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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.aspx.cs:
FtpClass.cs:
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:
首先,dll 点击 这里
下载,别忘记给项目添加引用
test.aspx:
<%@ Page language="c#" Codebehind="Test.aspx.cs" AutoEventWireup="false" Inherits="FtpTest.Test" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> <HEAD> <title>Test</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body> <form id="Form1" method="post" runat="server"> <input type="file" id="file1" runat="server"> <asp:TextBox id="tb_Dir" runat="server" Width="80px">\</asp:TextBox> <asp:Button id="btn_upload" runat="server" Text="Upload"></asp:Button> <asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False" CellPadding="3" DataKeyField="AutoID"> <ItemStyle Font-Size="9pt" Font-Names="Verdana"></ItemStyle> <HeaderStyle Font-Size="9pt" Font-Names="Verdana" Font-Bold="True"></HeaderStyle> <Columns> <asp:BoundColumn DataField="FileName" HeaderText="FileName"></asp:BoundColumn> <asp:BoundColumn DataField="FilePath" HeaderText="FilePath"></asp:BoundColumn> <asp:BoundColumn DataField="FileDownloadName" HeaderText="FileDownloadName"></asp:BoundColumn> <asp:BoundColumn DataField="FileSize" HeaderText="FileSize(K)"></asp:BoundColumn> <asp:BoundColumn DataField="UploadTime" HeaderText="UploadTime"></asp:BoundColumn> <asp:ButtonColumn Text="DOWNLOAD" HeaderText="Download" CommandName="Download"></asp:ButtonColumn> <asp:ButtonColumn Text="DEL" HeaderText="Del" CommandName="Del"></asp:ButtonColumn> </Columns> </asp:DataGrid> </form> </body> </HTML>
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 { /// <summary> /// Test 的摘要说明。 /// </summary> 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); } /// <summary> /// 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。 /// </summary> 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[arrs.Length-1]; 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[2].Text,e.Item.Cells[1].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[e.Item.ItemIndex]; 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[2].Text,e.Item.Cells[1].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[i-1].ToString():arrs[i-1].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[10240]; 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("<script>alert('file does not exist!');</script>"); } 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'[dbo].[FTP]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[FTP] GO CREATE TABLE [dbo].[FTP] ( [AutoID] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL , [FileName] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL , [FilePath] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL , [FileDownloadName] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL , [FileSize] [int] NULL , [UploadTime] [datetime] NULL ) ON [PRIMARY] GO
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