MVC ajax 上传图片问题

Question

Html.BeginForm("AddImg","admin",FormMethod.Post,new {  @enctype="multipart/form-data"}用以上MVC非AJAX能获取其中的<input type="file" id="f1" name="f1" />
换成
Ajax.BeginForm("AddImg","", new AjaxOptions { UpdateTargetId = "myimg" }, new { @enctype = "multipart/form-data" })之前就没办法获取<input type="file" id="f1" name="f1" />
了，不知道是不是哪里写错了，请高手指点！

Answer 1

你查看页面生成的html源代码，对比看下

Answer 2

统一1楼
推测
HttpMethod，需设置下

Answer 3

Ajax.BeginForm本来就是读取不了file,安全性问题,如同你在WEBFORM UpdatePanel中一样,无法使用file你可以试试jquery.form.js

Answer 4

js代码处理    var options = {
        dataType: 'json',
        beforeSubmit: _this.showRequest,  //提交前处理
        error: _this.showError,           //错误处理
        success: _this.showResponse       //提交成功的处理
    };
    $("#myForm").ajaxForm(options);cs代码处理public ContentResult DoSaveImg()
{
   ....Request.Files //保存处理
   return Content("成功", "text/html");
}

Answer 5

js代码处理，    var options = {
        dataType: 'json',
        beforeSubmit: _this.showRequest,  //提交前的处理
        error: _this.showError,           //出错的处理
        success: _this.showResponse       //提交成功后的处理
    };
    $("#myForm").ajaxForm(options);cs代码处理，public ContentResult DoSaveHotelCartea()
{
   .....Request.Files  //保存图片处理
   return Content("成功", "text/html");
}。

Answer 6

纯ajax没有办法执行文件上传你要上传文件必须有一个隐藏的frame 通过这个子frame上传 然后向子写入js代码来通知页面前台的代码：<div id="UpLoad_Show"></div><script type="text/javascript">
    function UpLoadPictureShow(id, ifVertically) {
        var value = $("#pictures").val();
        var img;
        if (ifVertically == "Vertically") {
            img = "<img alt='' src='/File/DownLoad/" + id + "' width='90px' height='120px' />&nbsp;";
        }
        else {
            img = "<img alt='' src='/File/DownLoad/" + id + "' width='120px' height='90px' />&nbsp;";
        }
        $("#UpLoad_Show").append(img);
        if (value == 0) {
            value = id;
        }
        else {
            value += "," + id;
        }
        $("#pictures").val(value);
    }
</script><div>
    <form action="/File/UpLoadPicture" method="post" enctype="multipart/form-data" target="UpLoad_Do">
        <input name="File1" type="file" />
        <input type="submit" value="上传" />
    </form>
    <iframe id="UpLoad_Do" src="../Child/UpLoad.htm" style="display:none"></iframe>
</div>
后台的代码：public void UpLoadPicture()
        {
            HttpPostedFileBase i = Request.Files[0];            //限定文件大小
            if (i.ContentLength > 0 && i.ContentLength <= WebSetting.fileSize)
            {
                Regex reg = new Regex(@".\w+$");
                string fileName = reg.Replace(i.FileName, "");                FileForSet t = new FileForSet();
                t.fileName = fileName;
                t.mime = i.ContentType;
                t.useFor = "picture";                int fileId = FileManager.Create(t, (Author)Session["userInfo"]);                //把上传的图片转为符合要求的缩略图
                System.Drawing.Bitmap img = new System.Drawing.Bitmap(i.InputStream);                #region  等比缩放                int theHeight = WebSetting.imgHeight;
                int theWight = WebSetting.imgWight;
                int newHeight;
                int newWight;                bool Vertically = (img.Height >= img.Width) ? true : false;                if (Vertically)
                {
                    theHeight = WebSetting.imgWight;
                    theWight = WebSetting.imgHeight;
                }                if (img.Height > img.Width * theHeight / theWight)
                {
                    newHeight = (img.Height >= theHeight) ? theHeight : img.Height;
                    newWight = img.Width * newHeight / img.Height;
                }
                else
                {
                    newWight = (img.Width >= theWight) ? theWight : img.Width;
                    newHeight = img.Height * newWight / img.Width;
                }                #endregion                System.Drawing.Image temp = img.GetThumbnailImage(newWight, newHeight, null, new IntPtr());
                string path = Server.MapPath("~/UpLoadFiles/File_" + fileId);
                FileManager.SavePath(fileId, path, (Author)Session["userInfo"]);
                temp.Save(path);                //通告页面上传已经完成
                if (Vertically)
                {
                    Response.Write("<script type='text/javascript'>window.parent.UpLoadPictureShow('" + fileId + "','Vertically');</script>");
                }
                else
                {
                    Response.Write("<script type='text/javascript'>window.parent.UpLoadPictureShow('" + fileId + "','NoVertically');</script>");
                }
            }
        }