NET MVC 上传文件

1.html

@using (html.beginform("uploadfile", "student", formmethod.post, new { enctype = "multipart/form-data" }))
{
    <div style="margin:13px;padding:13px;">
        <label style="float:left;">导入文件：</label>
        <input type="file" style="float:left;" name="myfile" />
    </div>
    <input type="submit" value="提交" />
}

或

<form name="myfrom" id="myform" method="post" action="~/student/uploadfile">
    <div style="margin:13px;padding:13px;">
        <label style="float:left;">导入文件：</label>
        <input type="file" style="float:left;" name="myfile" />
    </div>
    <input type="submit" value="提交" />
</form>

2.script：手动submit

<script>
    var message = "@tempdata["message"]";
    window.onload = function () {
        if (message != null && message != '' && message != "") {
            alert(message);
        }        
    }

    //  手动触发表单submit
    var onsubmit = function () {
        document.getelementbyid("myform").submit();
    }
</script>

3.uploadfileaction：import是导入视图

        /// <summary>
        /// 页面添加一个“导入数据”读取将“文件导入.xlsx”里面的学生信息，保存至“学生.xml”文件中
        /// </summary>
        /// <returns>上传文件结果信息</returns>
        [httppost]
        public actionresult uploadfile()
        {
            httppostedfilebase file = request.files["myfile"];
            if (file != null)
            {
                try
                {
                    //  file.filename//文件名
                    //  file.inputstream//文件流
                    tempdata["message"] = "导入成功！";
                    return view("import");
                }
                catch (exception ex)
                {
                    //return content(string.format("上传文件出现异常：{0}", ex.message));
                    tempdata["message"] = string.format("上传文件出现异常：{0}", ex.message);
                    return view("import");
                }

            }
            else
            {
                return view("import");
            }
        }