封装的上传文件的方法

//上传按钮

    protected void Button1_Click(object sender, EventArgs e)

    {

        string strFileExt;

        string strFileNewName;

        string strUrl;

        string strFileDownloadPath;

        int iFileSize;

        if (FileUpload1.HasFile)//判断是否选择了上传文件

        {

            strFileExt = Path.GetExtension(FileUpload1.FileName);//获得文件的扩展名

            if (strFileExt.ToLower() == “.rar”)

            {

                //为了避免上传文件重名,需要将上传的文件重命名

                strFileNewName = DateTime.Now.ToString(“yyyyMMddhhmmss”) + strFileExt;

                strUrl = Request.Url.ToString();

                strFileDownloadPath = strUrl.Substring(0, strUrl.LastIndexOf(‘/’)) + ‘/’ + strFileNewName;

                iFileSize = FileUpload1.PostedFile.ContentLength;

                FileUpload1.SaveAs(Server.MapPath(@”~\Upload\” + FileUpload1.FileName));//保存上传文件

                Response.Write(string.Format(“文件上传成功!<br>下载地址:{0}<br>文件大小:{1}字节<br>”,strFileDownloadPath,iFileSize));

            }

            else

            {

                Response.Write(“<script language=’javascript’>alert(‘系统只接受rar文件’);</script>”);

            }

        }

        else

        {

            Response.Write(“<script language=’javascript’>alert(‘请选择要上传的文件’);</script>”);

        }//封装的上传文件的方法

#region 上传文件的方法

    /// <summary>

    /// 上传文件方法

    /// </summary>

    /// <param>上传控件ID</param>

    /// <param>允许上传的扩展文件名类型,如：string[] allowExtensions = { “.doc”, “.xls”, “.ppt”, “.jpg”, “.gif” };</param>

    /// <param>允许上传的最大大小，以M为单位</param>

    /// <param>保存文件的目录，注意是绝对路径,如：Server.MapPath(“~/upload/”);</param>

    /// <param>保存的文件名，如果是”"则以原文件名保存</param>

    private void Upload(FileUpload myFileUpload, string[] allowExtensions, int maxLength, string savePath, string saveName)

    {

        // 文件格式是否允许上传

        bool fileAllow = false;

        //检查是否有文件案

        if (myFileUpload.HasFile)

        {

            // 检查文件大小, ContentLength获取的是字节，转成M的时候要除以2次1024

            if (myFileUpload.PostedFile.ContentLength / 1024 / 1024 >= maxLength)

            {

                throw new Exception(“只能上传小于2M的文件！”);

            }

            //取得上传文件之扩展文件名，并转换成小写字母

            string fileExtension = System.IO.Path.GetExtension(myFileUpload.FileName).ToLower();

            string tmp = “”;   // 存储允许上传的文件后缀名

            //检查扩展文件名是否符合限定类型

            for (int i = 0; i < allowExtensions.Length; i++)

            {

                tmp += i == allowExtensions.Length – 1 ? allowExtensions[i] : allowExtensions[i] + “,”;

                if (fileExtension == allowExtensions[i])

                {

                    fileAllow = true;

                }

            }

            if (fileAllow)

            {

                try

                {

                    string path = savePath + (saveName == “” ? myFileUpload.FileName : saveName);

                    //存储文件到文件夹

                    myFileUpload.SaveAs(path);

                }

                catch (Exception ex)

                {

                    throw new Exception(ex.Message);

                }

            }

            else

            {

                throw new Exception(“文件格式不符，可以上传的文件格式为：” + tmp);

            }

        }

        else

        {

            throw new Exception(“请选择要上传的文件！”);

        }

    }

    #endregion