C# 文件操作(上传 下载 删除 文件列表...)

using System.IO;

1.文件上传----------如下要点：HTML部分：<form id="form1" runat="server" method="post" enctype="multipart/form-data"><input id="FileUpLoad" type="file" runat="server"/><br />后台CS部分 按钮事件 //string strFileFullName = System.IO.Path.GetFileName(this.FileUpLoad.PostedFile.FileName);//this.FileUpLoad.PostedFile.SaveAs(Server.MapPath("./xmlzip/") + strFileFullName);

2.文件下载----------ListBox的SelectedIndexChanged事件 设定相关下载连接    protected void lst_DownLoadFileList_SelectedIndexChanged(object sender, EventArgs e)    {        try        {            string strJS = "window.open('xmlzip/";            strJS += this.lst_DownLoadFileList.SelectedItem.Text.Trim();            strJS += "'); return false; ";            this.imgbtn_DownLoadFile.Attributes.Add("onclick", strJS);        }        catch (Exception ex)        {            ex.ToString();        }    }或者也可以通过 改变Label的Text值 来实现点击后实现文件下载的超级连接this.Label1.Text = "<a href=/"xmlzip/a.rar/">a.rar</a>"

3.文件删除---------string strFilePath = Server.MapPath("../CountryFlowMgr/xmlzip/"+this.lst_DownLoadFileList.SelectedItem.Text.Trim());if (File.Exists(strFilePath)){   File.Delete(strFilePath);   if (File.Exists(strFilePath))   { Response.Write("ok");   }   else   {        Response.Write("ok");   }}

4.得到文件夹下的文件列表-----------#region 得到当前可用的文件列表    /// <summary>    /// 得到当前可用的文件列表    /// </summary>    /// <param name="IsAlert">是否需要弹出提示信息</param>    private void fn_getCurrFileList(bool IsAlert)    {        try        {            //查找xmlzip文件夹下 属于其本身UnitCoding的相关zip文件            string strXmlZipDirectory = Server.MapPath("../xmlzip/");            if (Directory.Exists(strXmlZipDirectory))            {                //DirectoryInfo di = new DirectoryInfo(Environment.CurrentDirectory);                DirectoryInfo di = new DirectoryInfo(strXmlZipDirectory);                                FileInfo[] FI = di.GetFiles("*.zip");//只查.zip文件                if (FI.Length > 0)                {                    lst_DownLoadFileList.Items.Clear();                    foreach (FileInfo tmpFI in FI)                    {                        ListItem tmpItem = new ListItem();                        tmpItem.Text = tmpFI.Name;                        lst_DownLoadFileList.Items.Add(tmpItem);                    }                    lst_DownLoadFileList.SelectedIndex = 0;                }                else                {                    if (IsAlert)                    {                        Response.write("查无可以下载的文件!");                    }                }            }        }        catch (Exception ex)        {            ex.ToString();        }    }    #endregion