图片上传代码

public class UpLoadFile:System.Web.UI.Page

    {    

        public UpLoadFile()    

        {    

            //        // TODO: 在此处添加构造函数逻辑        //    

        }  

        /// <summary>    

        /// 文件上传    

        /// </summary>    

        /// <param name="UpFile">上传控件</param>    

        /// <param name="SourceImg">源图片名子</param>    

        /// <param name="SourcePage">那个页面的操作</param>    

        /// <returns>返回上传的文件名,可以为空</returns>    

        public static string UpLoadFileImg(HttpPostedFile UpFile, string SourceImg, System.Web.UI.Page SourcePage)    

        {        

            //锁定页面        

            SourcePage.Application.Lock();        

            string Img = UpFile.FileName.Trim();//获取文件名        

            string WebPath = SourcePage.Server.MapPath("UpLoadFile/UsersPhoto/");//上传到指定路径        

            string Exten = Path.GetExtension(UpFile.FileName).ToUpper();//获取文件的扩展名       

            int FileLength = UpFile.ContentLength;//文件大小        

            string FileType = UpFile.ContentType.ToUpper();//获取文件的类型        

            if (Img != "")        

            {            

                //上传文件第一级文件扩展名和类型验证            

                if (Exten != ".GIF" && Exten != ".JPG" && FileType != "" && FileType != "")            

                {                

                    Img = "No";                

                    WebScript.JavaScript.OnlyAlertMsg(SourcePage, "上传文件格式只能是(.jpg||.gif)格式!");

                }            

                else if (FileLength / 1024 / 1024 > 1)  

                    //上传文件不能大于1M            

                {                

                    Img = "No";                

                    WebScript.JavaScript.OnlyAlertMsg(SourcePage, "上传图片不能超过1M");            

                }            

                else            

                {                

                    Img = DateTime.Now.ToString().Replace(" ", "").Replace(":", "").Replace("-", "") + Exten;

                    //以当前时间来命名                

                    //上传文件               

                    UpFile.SaveAs(WebPath + Img);                

                    //最后一部高级验证,图片上传后的操作,判断是否真的是图片                

                    StreamReader sr = new StreamReader(WebPath + Img, Encoding.Default);                

                    string strContent = sr.ReadToEnd();                

                    sr.Close();                

                    string str = "request|script|.getfolder|.createfolder|.deletefolder|.createdirectory|.deletedirectory|.saveas|wscript.shell|script.encode|server.|.createobject|execute|activexobject|language=";                

                    foreach (string s in str.Split('|'))                    

                        if (strContent.IndexOf(s) != -1)                    

                        {                        

                            File.Delete(WebPath + Img);                        

                            Img = "No";                        

                            WebScript.JavaScript.OnlyAlertMsg(SourcePage, "这张图片格式非法,请换一张,谢谢!");

                            break;                    

                        }                

                    //删除源文件               

                    if (Img != "No" && File.Exists(WebPath + SourceImg))                   

                        File.Delete(WebPath + SourceImg);//如果文件已经存在就删除           

                }       

            }        

            else  Img = SourceImg;        

            //取消锁定页面        

            SourcePage.Application.UnLock();

            return Img;    

        }

    }

 

 
   
//锁定读取  

using System.IO;
using System.Text;



public string fileoper(string filepath)

{

  using(streamreader sr=File.OpenText(filepath))

  {

     string s="";

     while((s=sr.readline())!=null)

    {

       Response.Write(s);

    }

  }

}

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