谁有图片上传代码/加注释给份

Question

用来研究
   源码谢谢先

Answer 1

SaveAs 就可以了？还想要什么?

Answer 2

/// <summary>
        /// 上传多个图片
        /// by minjiang 07-08-01
        /// </summary>
        /// <param name="sSavePath">原图路径</param>
        /// <param name="sSaveSmallPath">小图路径</param>
        /// <param name="preFileName"></param>
        /// <param name="iMaxSize">大小</param>
        /// <param name="iWidth">宽</param>
        /// <param name="iHeight">高</param>
        /// <param name="intSucess">统计有多少个图片已经成功上传</param>
        /// <param name="arrFileNames">保存原图名称数组</param>
        /// <param name="arrSmallFileNames">保存小图名称数组</param>
        /// <returns></returns>        public string[] upPicture(string sSavePath, string sSaveSmallPath, string preFileName, int iMaxSize, int iWidth, int iHeight,int intSucess, out ArrayList arrFileNames, out ArrayList arrSmallFileNames)
        {
            arrFileNames = new ArrayList();
            arrSmallFileNames = new ArrayList();
            HttpFileCollection files = HttpContext.Current.Request.Files;
            string strfileoldpath; //上传原图片的保存路径
            string strfileoldname;//图片保存后名称
            string strfilesmallpath; //小图片的保存路径
            string strfilesmallname;//小图片保存后名称            string fileName, fileExtension;
            string[] arrayImageUrl = new string[4] { "", "", "", "" };
            int iSucess = 0;//统计有多少个图片已经成功上传
            try
            {
                for (int iFile = 0; iFile < files.Count; iFile++)
                {
                    ///'检查文件扩展名字   
                    HttpPostedFile postedFile = files[iFile];
                    //没有文件上传
                    if (postedFile.FileName == "")
                    {
                        arrayImageUrl[2] = "errorNoFile";
                        continue;                    }
                    fileName = System.IO.Path.GetFileName(postedFile.FileName);
                    if (fileName == "")
                    {
                        arrayImageUrl[2] = "errorNoFile";
                        continue;                    }                    fileExtension = System.IO.Path.GetExtension(fileName);
                    //判断上传文件类型
                    string filetype = postedFile.ContentType;
                    //判断是否图片
                    if ((filetype.IndexOf("image") == -1) || (fileExtension.Trim().ToLower() != ".jpeg") && (fileExtension.Trim().ToLower() != ".jpg") && (fileExtension.Trim().ToLower() != ".gif"))
                    {
                        arrayImageUrl[2] = "errorT";
                        continue;
                    }                    //判断是否图片大小超过上限
                    int MaxFile = 0;
                    MaxFile = postedFile.ContentLength;
                    if (MaxFile > (iMaxSize * 1024))
                    {
                        arrayImageUrl[2] = "errorb";
                        continue;
                    }                    //检查保存文件的目录是否存在,否则创建
                    strfileoldpath = CheckProductPictureML(sSavePath);
                    strfilesmallpath = CheckProductPictureML(sSaveSmallPath);                    //为文件命名,然后保存
                    Random ra = new Random();                    strfileoldname = preFileName + "_" + ra.Next(100000, 999999).ToString() + fileExtension;
                    strfilesmallname = "s_" + strfileoldname;                    strfileoldpath += "\\" + strfileoldname;
                    strfilesmallpath += "\\" + strfilesmallname;
                    //保存原始图像
                    postedFile.SaveAs(strfileoldpath);                    //把上传的图片另存一个小图
                    if (this.DealImage(strfileoldpath, strfilesmallpath, fileExtension, iWidth, iHeight))
                    {
                        arrayImageUrl[0] = sSavePath + "/" + strfileoldname;
                        arrayImageUrl[1] = sSaveSmallPath + "/" + strfilesmallname;
                        arrFileNames.Add(arrayImageUrl[0].ToString());
                        arrSmallFileNames.Add(arrayImageUrl[1].ToString());
                        iSucess += 1;                    }
                    else
                    {
                        arrayImageUrl[2] = "error";
                        continue;
                    }
                }
                //统计已经成功上传的图片数，如果大于等于1则说明上传成功
                if (iSucess >= intSucess)
                { arrayImageUrl[2] = ""; }
                else
                { arrayImageUrl[2] = "error"; }
            }
            catch
            {
                arrayImageUrl[2] = "error";
                return arrayImageUrl;
            }
            return arrayImageUrl;
        }

Answer 3

/// <summary>
/// 检查图片的保存路径是否存在
/// </summary>
/// <returns></returns>
public  string CheckProductPictureML(string sSavePath)
{
string strml=this.Server.MapPath(sSavePath);
if(Directory.Exists(strml)==false)
{
Directory.CreateDirectory(strml);
} #region maybe Use /***************************************************************** //年
strml+="\\"+DateTime.Now.Year.ToString();
if(Directory.Exists(strml)==false)
{
Directory.CreateDirectory(strml);
}
//月
strml+="\\"+DateTime.Now.Month.ToString();
if(Directory.Exists(strml)==false)
{
Directory.CreateDirectory(strml);
}
//日
strml+="\\"+DateTime.Now.Day.ToString();
if(Directory.Exists(strml)==false)
{
Directory.CreateDirectory(strml);
}
*****************************************************************/
#endregion return strml; 
}

Answer 4

///<summary>
        ///图片处理（另存一个小图片，并设定图片的最大宽度，最大高度，进行等比缩放）
        /// by fycooer 
        /// 2007-01-20
        ///</summary>
        ///<return></return>
        private bool DealImage(string Imagepath, string Imagesmallpath, string Extension,int iWidth,int iHeight)
        {
            int iWidthTemp=iWidth;
            int iHeightTemp=iHeight;
            //by minjiang 07-08-24
            double dHeight=(double )iHeight ;
            double dWidth=(double )iWidth ;
            try
            {
                System.Drawing.Image myimage = System.Drawing.Image.FromFile(Imagepath);                //int iHeight;
                //int iWidth = 180;
                //如果上传的图片的宽大于设置的宽或者图片的高大于设置的高
                if (myimage.Width > iWidth || myimage.Height > iHeight)
                {
                    if (((double)myimage.Width) / (double)iWidth > ((double)myimage.Height) / (double)iHeight)
                    {
                        // iHeight = Convert.ToInt16(((double)(iWidth / myimage.Width) * myimage.Height));
                        //by minjiang 07-08-08 修改                        dHeight = (double)iWidth / (double)myimage.Width;
                        dHeight = dHeight * myimage.Height;
                        iHeight = Convert.ToInt32(dHeight);
                    }
                    else
                    {
                        //iWidth = Convert.ToInt16(((double)iHeight / myimage.Height * myimage.Width));
                        //iWidth = myimage.Width;
                        //iHeight = myimage.Height;
                        //by minjiang 07-08-08 修改                        dWidth = (double)iHeight / (double)myimage.Height;
                        dWidth = dWidth * myimage.Width;
                        iWidth = Convert.ToInt32(dWidth);
                    }
                    if (iWidth > iWidthTemp)
                    {
                        iWidth = iWidthTemp;
                    }
                    if (iHeight > iHeightTemp)
                    {
                        iHeight = iHeightTemp;                    }
                }
                else
                {
                    //如果图片的宽或者是高都没有大于设定的值，则不进行任何缩放
                    //by minjiang 07-08-24 解决图片的缩略图片大小问题
                    iWidth = myimage .Width ;
                    iHeight = myimage .Height ;
                
                }
                
                    
                System.Drawing.Bitmap smallimage = new Bitmap(myimage, iWidth, iHeight);
                switch (Extension)
                {
                    case ".gif":
                        smallimage.Save(Imagesmallpath, System.Drawing.Imaging.ImageFormat.Gif);
                        break;
                    default:
                        smallimage.Save(Imagesmallpath, System.Drawing.Imaging.ImageFormat.Jpeg);
                        break;
                }
                smallimage.Dispose();
                myimage.Dispose();
                return true;
            }
            catch
            {
                return false;
            }
        }

Answer 5

//定义一个变量，取全部文件名
   string fileFullname=this.File1.PostedFile.FileName;
   //取出当前日期
   string dataName= DateTime.Now.ToString("yyyyMMddhhmmss"); 
   //取文件扩展名
   string fileName=fileFullname.Substring(fileFullname.LastIndexOf("\\")+1);
   //截取上传文件的扩展名既"."后面的字母所以+1
   string type=fileFullname.Substring(fileFullname.LastIndexOf(".")+1);
   //类型控制，想上传什么类型，可以在这里类似添加
   if(type=="jpg"||type=="gif"||type=="bmp")
   {
    this.File1.PostedFile.SaveAs(Server.MapPath("pic")+"\\"+dataName+fileName);
    Response.Write("<script language='javascript'>alert('上传成功!');</script>");
    //image1输出上传图片，可以在这里控制图片大小
    this.Image1.ImageUrl="pic"+"\\"+dataName+fileName;
   }
   else
   {
      Response.Write("<script language='javascript'>alert('你选的文件类型不符!');</script>");
   }

Answer 6

see:http://www.aspxboy.com/private/218/default.aspx