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mvc4 上传图片出错

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悬赏园豆:50 [已关闭问题] 关闭于 2015-10-07 18:10
@using (Html.BeginForm("Avatar", "Wap", FormMethod.Post, new { enctype = "multipart/form-data" }))
        {
            <div class="tit">修改头像</div>
            <div class="images_slider_container">
                <div class="images_slider">
                    <ul class="slides">
                        <li class="clone">
                            <img src="@Model" alt="" title="" border="0">
                        </li>
                    </ul>
                </div>
            </div>
            <div class="ui-wrap">
                <input type="file" id="image" name="image" value="选择图片">
            </div>
            <input type="submit" value="点击上传形象" class="btn" />
        }
/// <summary>
        /// 上传图片并生成缩略图
        /// </summary>
        /// <param name="upImage">HttpPostedFileBase控件</param>
        /// <param name="sThumbExtension">缩略图的thumb</param>
        /// <param name="intThumbWidth">生成缩略图的宽度</param>
        /// <param name="intThumbHeight">生成缩略图的高度</param>
        /// <returns>缩略图名称</returns>
        public string UpLoadImage(HttpPostedFileBase upImage, int intThumbWidth, int intThumbHeight)
        {
            string sThumbFile = "";
            string sFilename = "";
            string sThumbExtension="s";
            string sSavePath = "/attached/image/";
            string ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
            string timeString = DateTime.Now.ToString("HHmmss_ffff", DateTimeFormatInfo.InvariantInfo);
            if (upImage.FileName != null)
            {
                WeiPay.LogUtil.WriteLog("!!!!!!!!!!!!!!!!!!!文件名" + upImage.FileName);
                int nFileLen = upImage.ContentLength;
                if (nFileLen == 0)
                    return "没有选择上传图片";
                if(nFileLen > 1000 * 1000)
                    return "文件大于1M,不能上传!";
                //获取upImage选择文件的扩展名
                string extendName = System.IO.Path.GetExtension(upImage.FileName).ToLower();
                WeiPay.LogUtil.WriteLog("!!!!!!!!!!!!!!!!!!!选择文件的扩展名" + extendName);
                //判断是否为图片格式
                if (extendName != ".jpg" && extendName != ".jpge" && extendName != ".gif" && extendName != ".bmp" && extendName != ".png")
                    return "图片格式不正确";
                WeiPay.LogUtil.WriteLog("!!!!!!!!!!!!!!!!!!!图片格式不正确");

                byte[] myData = new Byte[nFileLen];
                upImage.InputStream.Read(myData, 0, nFileLen);
                //sFilename = System.IO.Path.GetFileName(upImage.FileName);
                //int file_append = 0;
                //检查当前文件夹下是否有同名图片,有则在文件名+1
                //while (System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename)))
                //{
                //    file_append++;
                //    sFilename = System.IO.Path.GetFileNameWithoutExtension(upImage.FileName)
                //        + file_append.ToString() + extendName;
                //}
                sSavePath += ymd + "/";
                if (!Directory.Exists(System.Web.HttpContext.Current.Server.MapPath(sSavePath)))
                {
                    Directory.CreateDirectory(System.Web.HttpContext.Current.Server.MapPath(sSavePath));
                }
                sFilename = timeString + extendName;
                System.IO.FileStream newFile
                    = new System.IO.FileStream(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename),
                    System.IO.FileMode.Create, System.IO.FileAccess.Write);
                newFile.Write(myData, 0, myData.Length);
                newFile.Close();

                WeiPay.LogUtil.WriteLog("!!!!!!!!!!!!!!!!!!!以上为上传原图");
                //以上为上传原图
                try
                {
                    //原图加载
                    using (System.Drawing.Image sourceImage = System.Drawing.Image.FromFile(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename)))
                    {
                        //原图宽度和高度
                        int width = sourceImage.Width;
                        int height = sourceImage.Height;
                        int smallWidth;
                        int smallHeight;
                        //获取第一张绘制图的大小,(比较 原图的宽/缩略图的宽  和 原图的高/缩略图的高)
                        if (((decimal)width) / height <= ((decimal)intThumbWidth) / intThumbHeight)
                        {
                            smallWidth = intThumbWidth;
                            smallHeight = intThumbWidth * height / width;
                        }
                        else
                        {
                            smallWidth = intThumbHeight * width / height;
                            smallHeight = intThumbHeight;
                        }
                        //判断缩略图在当前文件夹下是否同名称文件存在
                        //file_append = 0;
                        //sThumbFile = sThumbExtension + System.IO.Path.GetFileNameWithoutExtension(upImage.FileName) + extendName;
                        //while (System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sThumbFile)))
                        //{
                        //    file_append++;
                        //    sThumbFile = sThumbExtension + System.IO.Path.GetFileNameWithoutExtension(upImage.FileName) +
                        //        file_append.ToString() + extendName;
                        //}
                        sThumbFile = timeString + sThumbExtension + extendName;
                        //缩略图保存的绝对路径
                        string smallImagePath = System.Web.HttpContext.Current.Server.MapPath(sSavePath) + sThumbFile;
                        //新建一个图板,以最小等比例压缩大小绘制原图
                        using (System.Drawing.Image bitmap = new System.Drawing.Bitmap(smallWidth, smallHeight))
                        {
                            //绘制中间图
                            using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))
                            {
                                //高清,平滑
                                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                                g.Clear(Color.Black);
                                g.DrawImage(
                                sourceImage,
                                new System.Drawing.Rectangle(0, 0, smallWidth, smallHeight),
                                new System.Drawing.Rectangle(0, 0, width, height),
                                System.Drawing.GraphicsUnit.Pixel
                                );
                            }
                            //新建一个图板,以缩略图大小绘制中间图
                            using (System.Drawing.Image bitmap1 = new System.Drawing.Bitmap(intThumbWidth, intThumbHeight))
                            {
                                //绘制缩略图
                                using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap1))
                                {
                                    //高清,平滑
                                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                                    g.Clear(Color.Black);
                                    int lwidth = (smallWidth - intThumbWidth) / 2;
                                    int bheight = (smallHeight - intThumbHeight) / 2;
                                    g.DrawImage(bitmap, new Rectangle(0, 0, intThumbWidth, intThumbHeight), lwidth, bheight, intThumbWidth, intThumbHeight, GraphicsUnit.Pixel);
                                    g.Dispose();
                                    bitmap1.Save(smallImagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
                                }
                            }
                        }
                    }
                }
                catch
                {
                    //出错则删除
                    System.IO.File.Delete(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename));
                    return "图片格式不正确";
                }
                //返回缩略图名称
                return sSavePath + sThumbFile;
            }
            return "没有选择图片";
        }
/// <summary>
        /// 修改头像
        /// </summary>
        /// <returns></returns>
        [Authorize]
        public ActionResult Avatar()
        {
            var mb = memberservice.GetMemberInfo(WebSecurity.CurrentUserName);
            return View(model: mb.member_avatar);
        }

        [HttpPost]
        public ActionResult Avatar(HttpPostedFileBase image)
        {
            string strimg = wapService.UpLoadImage(image, 112, 120);
            if (strimg.IndexOf("attached") != -1)
            {
                return Content("<script>alert('" + strimg + "');</script>");
            }
            else
            {
                memberservice.setAvatar(WebSecurity.CurrentUserName, strimg);
                return Content("<script>alert('您已成功修改您的会员头像!');</script>");
            }
        }    

 

本地测试在上传图片时有时候正常,但有的图片在点击上传是不会直接执行后台代码

Socials的主页 Socials | 初学一级 | 园豆:106
提问于:2015-10-06 16:58
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所有回答(2)
0

我看你1M就不能上传了,图片这样设计不合理把

稳稳的河 | 园豆:4183 (老鸟四级) | 2015-10-06 17:55

提交后代码都没有反应,有什么合理不合理的?

支持(0) 反对(0) Socials | 园豆:106 (初学一级) | 2015-10-07 14:13

@Socials: 为什么代码没有反应?你先去看看你的表单提交后的请求是什么,参数是什么,粗看没什么问题,你的enctype也是正确的

支持(0) 反对(0) 稳稳的河 | 园豆:4183 (老鸟四级) | 2015-10-07 14:34

@稳稳的河: 就是应为enctype的问题,如果我去掉enctype就有反应,但是如果加上enctype就没有反应,但是不加enctype的话HttpPostedFileBase控件就是错误的

支持(0) 反对(0) Socials | 园豆:106 (初学一级) | 2015-10-07 16:57
0

没有上传过。。。来学习一下

如此低调的男人 | 园豆:840 (小虾三级) | 2015-10-06 20:48
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