Question

是否可以读取上传的文本文件，例如.txt并在文本框中显示内容？我想对上传的文件进行文件转换。我已经设法上传并验证了我想要的文件，只需点击一下按钮即可阅读内容并将其显示在准备转换的文本框中。我该怎么做呢？上传课程

public class UploadedFile
{
    public long Size { get; set; }
    public string Path { get; set; }
    public string Name { get; set; }
   // public int Length { get; set; }
    public string extension { get; set; }
}

public class HomeController : Controller
{
    [HttpGet]
    public ActionResult Index()
    {
        ViewBag.Message = "Modify this template to jump-start your ASP.NET MVC application.";

        return View();
    }
    [HttpPost]
    public ActionResult Index(HttpPostedFileBase file)
    {
        var supportedTypes = new[] { "txt", "rtf", "html", "xaml", "xslx" ,"pdf", "doc", "docx", "csv" };

        var fileExt = System.IO.Path.GetExtension(file.FileName).Substring(1);

        if (!supportedTypes.Contains(fileExt))
        {
            ModelState.AddModelError("file", "Invalid type. Only the following types (txt, rtf, html, xslx, pdf, xaml, doc, docx, csv) are supported.");
            return View();
        }
        if (file.ContentLength > 200000)
        {
            ModelState.AddModelError("file", "The size of the file should not exceed 200 KB");
            return View();
        }
        if (file.ContentLength > 0)
        {


            var fileName = Path.GetFileName(file.FileName);
            var path = Path.Combine(Server.MapPath("~/uploads"), fileName);
            file.SaveAs(path);
        }

        return RedirectToAction("Index");
    }

    public ActionResult About()
    {
       var uploadedFiles = new List<UploadedFile>();
        var files = Directory.GetFiles(Server.MapPath("~/uploads"));
        foreach(var file in files)
        {
            var fileInfo = new FileInfo(file);
            var uploadedFile = new UploadedFile() {Name = Path.GetFileName(file)};
            uploadedFile.Size = fileInfo.Length;
            uploadedFile.extension = Path.GetExtension(file);

            uploadedFile.Path = ("~/uploads/") + Path.GetFileName(file);

            uploadedFiles.Add(uploadedFile);
        }
        return View(uploadedFiles);
    }
}

到目前为止，上传的文件都列在一个表格中。如果单击按钮并且内容放在表格下方的文本区域内，我想阅读并显示内容。所以我可以进行转换。

enter image description here 我怎么做到这一点？感谢

`<script>$('btnreadfile').click(function () {
    document.location = '@Url.Action("ReadTextFile","Home")'; });</script>
      <input id="btnreadfile" name="btnReadFile" type="submit" value="Read File"/>

    `My button Code

Answer 1

工作代码。经过全面测试

在你 _Layout.cshtml

中

<head>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
</head>

About.cshtml

中的

表格标记

<table style="background-color: lightgreen; border: solid 2px black;">
    <tr>
        <td>
            <b>Name</b>
        </td>
        <td>
            <b>Size</b>
        </td>
        <td>
            <b>Preview</b>
        </td>
        <td>
            <b>Read File</b>
        </td>
    </tr>
    @foreach (var file in Model)
    {    
        <tr>
            <td>
                @file.Name
            </td>
            <td>
                @(file.Size / 1000) KB
            </td>
            <td>
                @(file.extension)
            </td>
            <td>
                <input id="btnreadfile" name="@file.Name" class='btnClick' type="button" value="Read File"/>
                <textarea rows="4" cols="50">
</textarea>
            </td>
        </tr>   
    }
</table>

About.cshtml 一直在底部添加此脚本

<script>
    $.ajax({
        url: "/Home/ReadTextFile", 
        type: "GET",
        data: { fileName: $(this).attr("name") },
        DataType: "text",
        success: function (str) {
            alert(str);
            $("textarea").val(str); // this line has to be replaced with more dynamic jQuery selector that can select this button next textarea
            //$(this).next("textarea").val(str);
        },
        error: function (err) {
            alert(err);
        }
    });
});
</script>

控制器中的

添加参考using System.Runtime.InteropServices.ComTypes;
添加 JsonResult 方法

public JsonResult ReadTextFile(string fileName)
        {
            string retString = string.Empty;
            string path = Path.Combine(Server.MapPath("~/uploads") , fileName );
            if (System.IO.File.Exists(path))
            {
                if (Path.GetExtension(path) == "doc" || Path.GetExtension(path) == ".docx")
                {
                    Microsoft.Office.Interop.Word.Application word = new Microsoft.Office.Interop.Word.Application();
                    object miss = System.Reflection.Missing.Value;
                    object readOnly = true;
                    object wordPath = path;
                    Microsoft.Office.Interop.Word.Document docs = word.Documents.Open(
                        ref wordPath, 
                        ref miss, 
                        ref readOnly, 
                        ref miss, ref miss, ref miss, 
                        ref miss, ref miss, ref miss, 
                        ref miss, ref miss, ref miss, 
                        ref miss, ref miss, ref miss, ref miss);
                    for (int i = 0; i < docs.Paragraphs.Count; i++)
                    {
                        retString += " \r\n " + docs.Paragraphs[i + 1].Range.Text.ToString();
                    }
                }
                else if (Path.GetExtension(path) == "txt")
                {
                    using (StreamReader sr = new StreamReader(path))
                    {
                        retString = sr.ReadToEnd();
                    }
                }
            }
            return Json(retString, JsonRequestBehavior.AllowGet);
        }

注意：我考虑过只读取扩展名为.doc, .docx and .txt的文件，其他任何扩展都应该进一步处理

在MVC中读取和显示上载的文本文件

1 个答案: