I tried a file uploading method from StackOverflow and successfully uploaded the image with the IHostEnvironment
setup. But I can't figure out the Editmodel
. I want to delete the existing photo and add a new one in the edit form.
Here is Model:
[Key]
public int PostID { get; set; }
[Required]
[StringLength(160)]
public string Title { get; set; }
public string FeatureImage { get; set; }
Here is the Create.cshtml.cs:
public class CreateModel : PageModel
{
private readonly RazorApp.Data.ApplicationDbContext _context;
private readonly IHostEnvironment hostingEnvironment;
public CreateModel(RazorApp.Data.ApplicationDbContext context, IHostEnvironment environment)
{
this.hostingEnvironment = environment;
_context = context;
}
[BindProperty]
public Post Post { get; set; }
[BindProperty]
public IFormFile Image { get; set; }
public async Task<IActionResult> OnPostAsync()
{
if (this.Image != null)
{
var fileName = GetUniqueName(this.Image.FileName);
var uploads = Path.Combine(hostingEnvironment.ContentRootPath, "wwwroot/uploads");
var filePath = Path.Combine(uploads, fileName);
this.Image.CopyTo(new FileStream(filePath, FileMode.Create));
this.Post.FeatureImage = fileName; // Set the file name
}
var emptyPost = new Post();
if (await TryUpdateModelAsync<Post>(
emptyPost,
"post",
p => p.Title, p => p.FeatureImage))
{
_context.Post.Add(Post);
await _context.SaveChangesAsync();
return RedirectToPage("./Index");
}
return Page();
}
private string GetUniqueName(string fileName)
{
fileName = Path.GetFileName(fileName);
return Path.GetFileNameWithoutExtension(fileName)
+ "_" + Guid.NewGuid().ToString().Substring(0, 4)
+ Path.GetExtension(fileName);
}
}
As I said, uploading the image working fine. But I can't figure out for the edit.cshtml.cs. How can I delete the existing photo and add the new image?
Here is a working sample, you could refer to:
Edit.cshtml
<div class="col-md-4">
<form method="post" enctype="multipart/form-data">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<input type="hidden" asp-for="Post.PostID" />
<div class="form-group">
<label asp-for="Post.Title" class="control-label"></label>
<input asp-for="Post.Title" class="form-control" />
<span asp-validation-for="Post.Title" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Post.FeatureImage" class="control-label"></label>
<input asp-for="Post.FeatureImage" class="form-control" />
<span asp-validation-for="Post.FeatureImage" class="text-danger"></span>
</div>
<div class="form-group">
<label class="control-label">New Image</label>
<input asp-for="Image" class="form-control" />
</div>
<div class="form-group">
<input type="submit" value="Save" class="btn btn-primary" />
</div>
</form>
</div>
Edit.cshtml.cs
public class EditModel : PageModel
{
private readonly ChangeUploadedImage.Data.MyDbContext _context;
private readonly IHostingEnvironment hostingEnvironment;
public EditModel(MyDbContext context, IHostingEnvironment environment)
{
_context = context;
hostingEnvironment = environment;
}
[BindProperty]
public Post Post { get; set; }
[BindProperty]
public IFormFile Image { get; set; }
public async Task<IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return Page();
}
if (this.Image != null)
{
var path = Path.Combine(hostingEnvironment.ContentRootPath, "wwwroot/uploads", Post.FeatureImage);
if (System.IO.File.Exists(path))
{
System.IO.File.Delete(path);
}
var fileName = GetUniqueName(this.Image.FileName);
var uploads = Path.Combine(hostingEnvironment.ContentRootPath, "wwwroot/uploads");
var filePath = Path.Combine(uploads, fileName);
this.Image.CopyTo(new FileStream(filePath, FileMode.Create));
this.Post.FeatureImage = fileName;
}
_context.Attach(Post).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!PostExists(Post.PostID))
{
return NotFound();
}
else
{
throw;
}
}
return RedirectToPage("./Index");
}
private string GetUniqueName(string fileName)
{
fileName = Path.GetFileName(fileName);
return Path.GetFileNameWithoutExtension(fileName)
+ "_" + Guid.NewGuid().ToString().Substring(0, 4)
+ Path.GetExtension(fileName);
}
}
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