How to save and retrieve the values of textbox when model return list

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C#

Razor

ASP.NET-Core

I have a view which return a model in list .

My view is as follows

<div class="container" style="padding: 0; height: 100%; width: 100%; margin: 0">
                    
    @foreach (handbook.Data.EmpDoc files in Model)
    {
        @if (files.Filevalues == "0")
        {
        }
        else 
        {
        }
    }

    <table class="table table-bordered table-striped">
        <thead>
            <tr style="text-align: center">                                
                <th>File Name</th>                                
                <th>Download</th>
            </tr>
        </thead>
        <tbody>
            <tr style="text-align: center">                                        
                <td></td>
                <td>@files.Filename</td>                                        
                <td class="text-nowrap">@Html.ActionLink("Download",     "DownloadFile", new { fileName = files.Filename, id = files.EmployeeId })</td>
            </tr>
            <tr style="text-align: center">
                <td></td>
                <td>@files.Filename</td>
                <td class="text-nowrap">@Html.ActionLink("Download", "DownloadFile", new { fileName = files.Filename, id = files.EmployeeId })</td>
            </tr>
        </tbody>
    </table>
</div>

I this view i need to add a text box below the table and save and retrieve its comments

but since the controller return list and to retrieve the files i a using foreach loop the text box is repeating for 5 times instead of 1.

If i add the text box alone in a separate div the asp-for is not recognized since i cant passit in for each loop.

What I have tried:

my controller is as follows

public async Task<iactionresult> DocumentValidate(int? id)
{
    if (id == null || _context.EmpDocs == null)
    {
        return NotFound();
    }

    var getinfo = await _context.EmployeeBasicInformations.FindAsync(id);
    ViewBag.empid = getinfo.EmployeeId;
            
    var foldername = getinfo.EmployeeEmail;

    var docinfo = await _context.EmpDocs.FindAsync(id);
    ViewBag.remarks = docinfo.HrRemarks;

    EmpDoc lol = new EmpDoc();

    string dirPath = Configuration["FolderPath:Document_Path"];

    string path = Path.Combine(dirPath, foldername);

    string[] folderpath = Directory.GetFiles(path);

    EmpDoc docsss = new EmpDoc();

    List<empdoc> files = new List<empdoc>();

    foreach (string folderpaths in folderpath)
    {
        files.Add(new EmpDoc
        {
            Filename = Path.GetFileName(folderpaths),
            EmployeeId = getinfo.EmployeeId,
            Filevalues = Path.GetFileNameWithoutExtension(folderpaths)
        });
    }

    return View(files);
}

any model is as follows

public partial class EmpDoc
{
    [Key]
    public int EmployeeId { get; set; }

    public string? HrRemarks { get; set; }
    [NotMapped]
    public IFormFile File { get; set; }

    [NotMapped]
    public string Filename { get; set; }


    [NotMapped]
    public string Filevalues { get; set; }
}

How to save and retrieve it. Please advice