数据不显示在textarea中

Question

我通过以下代码绑定了mvc中的DATA：

@model DocumentManagementSystem.Models.DocumentFileName
@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <table style="margin-top:50px;">
        <tr>
            <td>
                <input type="file" name="file" />
            </td>
            <td>
                <input type="submit" name="Submit" id="Submit" value="Upload" />
            </td>
        </tr>
    </table>
    @Html.TextAreaFor(f => f.Data, new { ViewBag.DocumentData })
}

DATA绑定来自Viewbag。我将此值赋给textarea。它显示在源中使用F12，但它没有显示在UI部分中。我附上了截图：

我突出显示了在同一textarea中没有看到的值。

下面是我的控制器代码，通过它我将数据发布到Viewbag：

        [HttpPost]
        public ActionResult Upload()
        {
            if (Request.Files.Count > 0)
            {
                var file = Request.Files[0];
                object filename = Path.Combine(Server.MapPath("~/Document/"), file.FileName);
                Microsoft.Office.Interop.Word.ApplicationClass AC = new Microsoft.Office.Interop.Word.ApplicationClass();
                Microsoft.Office.Interop.Word.Document doc = new Microsoft.Office.Interop.Word.Document();
                object readOnly = false;
                object isVisible = true;
                object missing = System.Reflection.Missing.Value;
                var retString = "";
                try
                {
                    doc = AC.Documents.Open(ref filename, ref missing, ref readOnly, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible);
                    retString = doc.Content.Text;
                }
                catch (Exception ex)
                {
                    retString = ex.ToString();
                }
                ViewBag.DocumentData = new MvcHtmlString(System.Web.HttpUtility.HtmlDecode(retString.ToString()));
            }
            else
            {
                ViewBag.result = "Document Not Support";
            }
            return View("Index");

        }

Answer 1

据我所知，你不能用textarea这样做，因为它与Model.Data的值绑定。

在使用textareafor之前，你能否宣布你的Model.Data = ViewBag.DocumentData？

编辑：例如：

@model DocumentManagementSystem.Models.DocumentFileName
@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
    Model.Data = ViewBag.DocumentData;
}

@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, new { enctype = "multipart/form-data" }))
{ 

    @Html.TextAreaFor(f => f.Data)
}