开源1句代码搞定图片批量上传，无需什么代码功底无语言界限

Posted 2020-07-14 码道安邦

开源地址：https://github.com/dunitian/LoTUploader

WebUploader基础上的封装改善，一句代码全部实现（样式美化，实例JS优化（配置优化，样式调整，名称+大小显示，错误处理等），后端代码。。。。。）

 效果：（完整demo：https://github.com/dunitian/LoTUploader/tree/V1.0.1/Demo）

一句代码：$.lotuploader(\'lot-uploader\', \'/Home/Upload\'); //必填参数：ID，Server地址 （完整案例看Demo部分）

第一步：引入样式

<link href="Scripts/lotUploader/lotuploader1.0.1.min.css" rel="stylesheet" />

第二步：自己定义一个DIV（id名任意）

<div id="lot-uploader"></div>

第三步：引入脚本

<script src="http://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
<script src="Scripts/lotUploader/lotuploader1.0.1.min.js"></script>

代码部分：

<script type="text/javascript">

$.lotuploader({
　　lotDocId: \'lot-uploader\', //ID
　　lotUrl: \'/Home/Upload\', //服务器Post地址
});

</script>

单文件处理：

$.lotuploader({
        lotDocId: \'lot-uploader\',
        lotUrl: \'服务器Post地址\',
        oneFile: true,
        fileSize: 1024 * 1024 * 5,
        btnStr: \'点我就上传默认展图\',
        lotSuccessFunc: function (file,data) {
            //方法主体
        },
        lotErrorFunc: function (msg) {
            $(\'#lot-uploader\').append(\'<div class="lot-temp" style="color:red">\' + msg + \'</div> \');
            setTimeout(function () {
                $(\'.lot-temp\').remove();
            }, 2000);
        }
    });

后端实例代码：

/// <summary>
        /// 图片上传
        /// </summary>
        /// <returns></returns>
        public JsonResult Upload(HttpPostedFileBase file)
        {
            if (file == null) { return Json(new { status = false, msg = "图片提交失败" }); }
            if (file.ContentLength > 10485760) { return Json(new { status = false, msg = "文件10M以内" }); }
            string filterStr = ".gif,.jpg,.jpeg,.bmp,.png";
            string fileExt = Path.GetExtension(file.FileName).ToLower();
            if (!filterStr.Contains(fileExt)) { return Json(new { status = false, msg = "图片格式不对" }); }
            //防止黑客恶意绕过，从根本上判断下文件后缀
            if (!file.InputStream.CheckingExt())
            {
                //todo：一次危险记录
                return Json(new { status = false, msg = "图片格式不对" });
            }
            //todo: md5判断一下文件是否已经上传过,如果已经上传直接返回 return Json(new { status = true, msg = sqlPath });

            string path = string.Format("{0}/{1}", "/lotFiles", DateTime.Now.ToString("yyyy-MM-dd"));
            string fileName = string.Format("{0}{1}", Guid.NewGuid().ToString("N"), fileExt);
            string sqlPath = string.Format("{0}/{1}", path, fileName);
            string dirPath = Request.MapPath(path);

            if (!Directory.Exists(dirPath)) { Directory.CreateDirectory(dirPath); }
            try
            {
                //todo：缩略图
                file.SaveAs(Path.Combine(dirPath, fileName));
                //todo: 未来写存数据库的Code
            }
            catch { return Json(new { status = false, msg = "图片保存失败" }); }
            return Json(new { status = true, msg = sqlPath });
        }

/// <summary>
    /// 判断扩展名是否是指定类型---默认是判断图片格式，符合返回true（没有释放stream，请手动：file.InputStream.Dispose();）
    /// eg：图片+压缩+文档："7173", "255216", "6677", "13780", "8297", "55122", "8075", "208207"
    /// eg：img，"7173", "255216", "6677", "13780" //gif  //jpg  //bmp //png
    /// eg：file,"8297", "55122", "8075", "208207" //rar //7z //zip + 文档系列
    /// </summary>
    /// <param name="stream">文件流</param>
    /// <param name="fileTypes">文件扩展名</param>
    /// <returns></returns>
    public static bool CheckingExt(this Stream stream, params string[] fileTypes)
    {
        if (fileTypes == null || fileTypes.Length == 0) { fileTypes = new string[] { "7173", "255216", "6677", "13780" }; }
        bool result = false;
        string fileclass = "";

        #region 读取头两个字节
        var reader = new BinaryReader(stream);
        byte[] buff = new byte[2];
        try
        {
            reader.Read(buff, 0, 2);//读取每个文件的头两个字节
            fileclass = buff[0].ToString() + buff[1].ToString();
        }
        catch (System.Exception ex) { stream.Dispose(); reader.Dispose(); return false; }
        #endregion

        #region 校验
        for (int i = 0; i < fileTypes.Length; i++)
        {
            if (fileclass == fileTypes[i])
            {
                result = true;
                break;
            }
        }
        #endregion
        return result;
    }

 

注意点：

如果你项目并不使用font-awesome，那请吧.upload-state-done:after样式修改一下，这样成功后就很明了

案例没有采用纯Net语法，只是把服务端处理用Net处理了下。index.html部分通用

CDN地址：

https://cdn.rawgit.com/dunitian/LoTUploader/master/Dist/progress.png

https://cdn.rawgit.com/dunitian/LoTUploader/master/Dist/lotuploader.swf

https://cdn.rawgit.com/dunitian/LoTUploader/master/Dist/lotuploader.min.css

https://cdn.rawgit.com/dunitian/LoTUploader/master/Dist/lotuploader1.0.2.min.js