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);
    }
  }
}
posted @ 2012-10-11 15:02 Dzs 阅读(...) 评论(...) 编辑 收藏