C#下载远程文件到本地

using System;

namespace DownRemoteFile

{

    class DownFile

    {

        #region 成员变量



        private string savePath;

        private bool newName;



        #endregion



        #region 属性



        public string SavePath

        {

            set 

            { 

                savePath=value.Replace("/", "\");

                if (savePath.LastIndexOf("\") != savePath.Length - 1)

                    savePath += "\";

            }

            get

            {

                return savePath;

            }

        }



        public bool NewName

        {

            set { newName = value; }

            get { return newName; }

        }



        #endregion



        #region 构造函数



        public DownFile() 

        {

            newName = false;

            savePath = "c:\";

        }



        #endregion



        #region 私有方法



        /// 

        /// 随机返回文件名

        /// 

        /// 

        private string getFileName()

        {

            System.Random objDom = new Random();

            int intNum = objDom.Next(1000, 9999);

            objDom = null;

            string strNum = System.DateTime.Now.ToString("yyyyMMddhhmmss");

            return strNum + intNum.ToString();

        }



        /// 

        /// 根据文件得到文件扩展名

        /// 

        /// 文件名

        /// 

        private string getExtension(string fileName)

        { 

            int start=fileName.IndexOf(".")+1;

            string Ext = fileName.Substring(start, fileName.Length - start);

            return Ext;

        }



        #endregion



        #region 公共方法



        /// 

        /// 保存远程文件

        /// 

        /// 远程文件路径

        /// 

        public string SaveFile(string filePath)

        {

            string fPath, fName, sPath;

            fPath = filePath.Replace("\", "/");

            int start = fPath.LastIndexOf("/") + 1;

            fName = fPath.Substring(start, fPath.Length - start);

            if (newName)

            {

                sPath = savePath + getFileName() + "." + getExtension(fName);

            }

            else

            {

                sPath = savePath + fName;

            }

            

            System.Net.WebClient myWebClient = new System.Net.WebClient();

            try

            {

                myWebClient.DownloadFile(fPath, sPath);

            }

            catch (Exception ee)

            {

                throw ee;

            }

            finally

            {

                myWebClient.Dispose();

            }

            return fName;

        }



        #endregion



    }

}