Update image from www/Upload/DP/image.png asp.net core 2 - asp.net-core-2.0

Question

I have a code for image upload and that working as expected, in my way image is DP display picture of user.
Create.cshtml
<div class="form-group">
<label asp-for="DP" class="control-label">Profile Image</label>
<input type="file" name="DP" asp-for="DP" class="form-control" />
<span asp-validation-for="DP" class="text-danger"></span>
</div>
Controller Action
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(Profile profile, IFormFile DP)
{
if (ModelState.IsValid)
{
var id = _userManager.GetUserName(HttpContext.User);
var fileName = Path.Combine(_environment.WebRootPath +"/Upload/DP/", Path.GetFileName(id+".png"));
DP.CopyTo(new FileStream(fileName,FileMode.Create));
//profile.DP = fileName;
ViewBag.fileName = fileName;
var create = new Profile {
userName = profile.userName,
uId = profile.uId,
rId = profile.rId,
Mobile = profile.Mobile,
Job = profile.Job,
City = profile.City,
Address = profile.Address,
dof = profile.dof,
DP = profile.DP = Path.GetFileName(id+".png"),
CreatedOn = profile.CreatedOn,
Status = profile.Status
};
_context.Add(profile);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
ViewData["rId"] = new SelectList(_context.Set<CharityRole>(), "rId", "Name", profile.rId);
return View(profile);
}
Question: How I can delete existing image and add a new one with same name bcz its display on user profile like:
<img src="#Url.Content("~/Upload/DP/"+ _userManager.GetUserName(User)+".png")">

Answer 1

There are two issues in your post.
You need to use Using for FileStream, otherwise, the filestream will be not disposed.
using (var fileStream = new FileStream(fileName, FileMode.Create))
{
await DP.CopyToAsync(fileStream);
}
You need to pass create instead of profile to _context.Add.
Here is the complete demo code:
public async Task<IActionResult> Create(Profile profile, IFormFile DP)
{
if (ModelState.IsValid)
{
var id = _userManager.GetUserName(HttpContext.User);
var fileName = Path.Combine(_environment.WebRootPath + "/Upload/DP/", Path.GetFileName(id + ".png"));
using (var fileStream = new FileStream(fileName, FileMode.Create))
{
await DP.CopyToAsync(fileStream);
}
var create = new Profile
{
UserName = profile.UserName,
DP = Path.GetFileName(id + ".png")
};
_context.Add(create);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
return View(profile);
}