App_Code/Common/Images.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.IO;
using SystemChars;
/// <summary>
/// Images 的摘要说明
/// </summary>
/// 
namespace NT.Common
{
    public class Images
    {
        public Images()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        #region 判断上传的图片的格式
        /// <summary> 
        /// 判断上传的图片的格式 返回值为1是成功， 0为失败
        /// </summary>
        /// <param name="FileUpload1">FileUpload控件</param>
        /// <param name="address">图片保存的路径，例："image/"</param>
        /// <returns>图片名</returns>
        public string GetImgType(FileUpload FileUpload1,string address)
        {
            string name = Chars.GetNewFileName(FileUpload1.FileName);
            string imageUrl = address + name;
            string imageType = FileUpload1.FileName.Split('.')[1];
           // string imageName = FileUpload1.FileName.Split('.')[0];
            if (imageType.ToLower() == "jpg" || imageType.ToLower() == "gif" || imageType.ToLower() == "png")
            {
                FileUpload1.SaveAs(System.Web.HttpContext.Current.Server.MapPath(imageUrl));
                return name;
            }
            else
            {
                return name = "";
            }
        }
        #endregion

        #region 生成缩略图1
        /// <summary>
        /// 生成缩略图（上传后再使用此生成的缩略图）
        /// </summary>
        /// <param name="sProductImg">图片名（已存在）</param>
        /// <param name="sWidth">宽度</param>
        /// <param name="sHeight">高度</param>
        /// <param name="DrawMsg">可以为空</param>
        /// <param name="adderss">路径，放图片的图径~/productphoto/</param>