aspnet图片上传-简单实用(VS2008 FileUpload控件 ASPNET20)按时间

using System.Collections;

using System.Configuration;

using System.Data;

using System.IO;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

namespace FileUpload

{

    public partial class _Default : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

        }

        protected void btnFileUpload_Click(object sender, EventArgs e)

        {

            UploadPicFile(ImgFileUpload);

        }

        internal readonly string AllowExt = "jpe|jpeg|jpg|png|tif|tiff|bmp|gif|wbmp|swf|psd";

///

/// 文件名扩展名

/// 如果扩展名有效,返回true,否则返回false.

        bool CheckValidExt(string sExt)

        {

            bool flag = false;

            string[] aExt = AllowExt.Split('|');

            foreach (string filetype in aExt)

            {

                if (filetype.ToLower() == sExt.Replace(".", ""))

                {

                    flag = true;

                    break;

                }

            }

            return flag;

        }

        private void UploadPicFile(System.Web.UI.WebControls.FileUpload Fupload)

        {

            //文件上传函数

            try

            {

                if (Fupload.HasFile)

                {

                    //判断文件格式

                    string sExt = Fupload.FileName.Substring(Fupload.FileName.LastIndexOf(".")).ToLower();

                    if (!CheckValidExt(sExt))

                    {

                        lblMsg.Text = "(原图片文件格式不正确！支持的格式有[ " + AllowExt + " ])";

                        return;

                    }

                    //判断文件大小

                    int intFileLength = Fupload.PostedFile.ContentLength;

if (intFileLength > 1000 * 1000)

                    {

                        this.lblMsg.Text = "文件大于1M，不能上传！";

                        return;

                    }

                    Random ran = new Random();