Question

我有MVC主计长和我的Razak先生的意见。 NET Core C# web application.

It handles PayPal payments but I am thinking could I use this Controller with a View to upload and manipulate images using System.Drawing? (System.Drawing does not work in Razor Core website)

我在MVC中树立了许多榜样来操纵图像。似乎没有人为我的新的核心工作。 NET C# website。

为了更深入地了解我的问题,我把我正在以下网站上工作的守则列入我的网站,其中显示了我对篡改形象的需要。密码上载了档案/无问题。它仍然没有被证实,而是试图在卸载之前操纵档案。

我想,如果我有MVC主计长,并在Rzakor的申请内有观点,它将允许该系统的所有选择。引资。我花了相当长的时间,在我有利的问题解决者——SO问题上,用了现有的答案。

namespace DaBamba.Pages.YourDances
{
    public class UploadFileModel : PageModel
    {
        private readonly Microsoft.AspNetCore.Hosting.IWebHostEnvironment _environment;
        public UploadFileModel(Microsoft.AspNetCore.Hosting.IWebHostEnvironment environment)
        {
            _environment = environment;
        }
        [BindProperty]
        public IFormFile Upload { get; set; }
        public async Task OnPostAsync()
        {

            var file = "C:\inetpub\wwwroot\DaBamba\wwwroot\images\DanceImages\" + Upload.FileName;

            using var fileStream = new FileStream(file, FileMode.Create);
          
            //RESIZE IMAGE HERE

            await Upload.CopyToAsync(fileStream);
        }
    }
}

Answer 1

I have MVC Controller and Views added to my Razor .NET Core C# web application.

It handles PayPal payments but I am thinking could I use this Controller with a View to upload and manipulate images using System.Drawing? (System.Drawing does not work in Razor Core website)

Yeah,如评论所述,在ASP.NET中,你是正确的。核心或微粒页应用,可直接使用系统。由于平台的兼容性限制,因此难以做到。此外,由于系统限制和安全考虑,没有建议进行图像处理。


相反,你可以尝试很少其他办法,以实现图像操纵。

例如,您可使用<代码>System.Drawing.Common。 NuGet式包裹或可使用图像Sharp图书馆进行图像处理。 NET 核心应用。

Let s have a look how you can implement that:

You can, install System.Drawing.Common library.

在安装成功后,你可以使用图象、比图和图象等课程进行基本图像操作。

例如:

using (var image = Image.FromStream(Upload.OpenReadStream()))
{
    using (var resizedImage = new Bitmap(image, new Size(newWidth, newHeight)))
    using (var stream = new MemoryStream())
    {
        resizedImage.Save(stream, ImageFormat.Jpeg);
        await stream.CopyToAsync(fileStream);
    }
}

或者,你甚至可以尝试<代码>Imagesharp Library。在这种情况下,你可以做如下工作:

In case of ImageSharp, first of all, you should open the uploaded image using the ImageSharp library, After that, you can resize the image using its width and height attribute. Finally, you can save the resized image to the file stream.

让我们在实践中审视我们如何能够做到:

            var file = Path.Combine(_environment.WebRootPath, "images", "DanceImages", Upload.FileName);

            using (var fileStream = new FileStream(file, FileMode.Create))
            {
               
                using (var image = Image.Load(Upload.OpenReadStream()))
                {
                   
                    var width = 300;
                    var height = 200;
                    image.Mutate(x => x.Resize(new ResizeOptions
                    {
                        Size = new Size(width, height),
                        Mode = ResizeMode.Max
                    }));

                    
                    image.Save(fileStream, new JpegEncoder());
                }
            }

<>说明: 你可以尝试其他办法,以达到你的要求。此外,您可以。

友情链接