Displaying Invalid user name or password using MVC Validation - asp.net-mvc

Question

I am using MVC validation to check if use name and password exit in database or not. ModelState.IsValid is true always even when I did not find any matching user.
if (objModel != null)
{
if (ModelState.IsValid && Membership.ValidateUser(objUsersModel.UserName, objUsersModel.Password))
{
Profile.Initialize(objUsersModel.UserName.Trim(), true);
FormsAuthentication.SetAuthCookie(objUsersModel.UserName, false);
return RedirectToAction("Index", "Home");
}
}
How can I set this to false and set the values for error message in mvc view. Here is my MVC view .
<form role="form">
<div class="form-group">
<label for="exampleInputEmail1">User Name </label>
<i class="fa fa-user"></i>
#Html.TextBoxFor(m => m.UserName, new { maxlength = 50, #class = "form-control" })
#Html.ValidationMessageFor(u => u.UserName)
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<i class="fa fa-lock"></i>
#Html.PasswordFor(m => m.Password, new { maxlength = 50, #class = "form-control" })
#Html.ValidationMessageFor(u => u.Password)
</div>
<div class="form-actions">
<label class="checkbox"> <input type="checkbox" class="uniform" value=""> Remember me</label>
<button type="submit" class="btn btn-danger">Submit</button>
</div>
</form>

Answer 1

You need to add a ModelState error and return the view if the user name and password are not valid
if (!ModelState.IsValid)
{
return View(yourModel);
}
if (!Membership.ValidateUser(objUsersModel.UserName, objUsersModel.Password)
{
ModelState.AddModelError(string.Empty, "The user name or password is incorrect");
return View(yourModel);
}
....
return RedirectToAction("Index", "Home");
and in the view, include
#Html.ValidationSummary(true)
to display the message