How to display validation summary below the input controls? - asp.net-core

Question

I have the following form:
<form asp-controller="Manage" asp-action="RemoveDetails" method="post" class="form-horizontal">
#if (Model.RequirePassword)
{
<div id="password-container">
<div class="col-md-6">
<div class="form-group">
<label asp-for="Password"></label>
<input asp-for="Password" class="form-control" id="password" autocomplete="current-password" aria-required="true" />
<small>
<span asp-validation-for="Password" class="text-danger"></span>
</small>
</div>
</div>
</div>
}
<div class="col-6">
<hr class="mt-2 mb-3">
<button type="submit" class="btn btn-style-1 btn-danger">Confirm</button>
</div>
<div class="row">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
</div>
</form>
If I leave the password empty, a validation message (the model uses DataAnnonations) is displayed right below the control. This is fine.
If I enter the wrong password, the Post action validates it and adds an error to the ModelState. This error is displayed below the form.
Is it possible to display such model errors below the relevant controls?

Answer 1

Try this code in Controller: ModelState.AddModelError("Password", "validation summary error."); The error message won't display in <div asp-validation-summary="ModelOnly"></div>, but it can display error message in #Html.ValidationSummary(false, "", new { #class = "text-danger" }).
<form asp-controller="Home" asp-action="RemoveDetails" method="post" class="form-horizontal">
<div id="password-container">
<div class="col-md-6">
<div class="form-group">
<label asp-for="Password"></label>
<input asp-for="Password" class="form-control" id="password" autocomplete="current-password" aria-required="true" />
<small>
#*<span asp-validation-for="Password" class="text-danger"></span>*#
#Html.ValidationSummary(false, "", new { #class = "text-danger" })
</small>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label asp-for="Description"></label>
<input asp-for="Description" class="form-control" id="description" autocomplete="current-password" aria-required="true" />
<small>
<span asp-validation-for="Description" class="text-danger"></span>
</small>
</div>
</div>
</div>
<div class="col-6">
<hr class="mt-2 mb-3">
<button type="submit" class="btn btn-style-1 btn-danger">Confirm</button>
</div>
<div class="row">
<div asp-validation-summary="ModelOnly"></div>
</div>
</form>
[HttpPost]
public IActionResult RemoveDetails(RemoveDetail rdl)
{
if(ModelState.IsValid)
{
var pwd = rdl.Password;
//do something here and find the password is wrong
//code below won't display error message in <div asp-validation-summary="ModelOnly" class="text-danger">
//but can display error message in #Html.ValidationSummary(false, "", new { #class = "text-danger" })
ModelState.AddModelError("Password", "validation summary error.");
return View(rdl);
}
return View(rdl);
}