for f in *.c; do echo "That $f is the best C code I have ever seen"; done

如果没有c文件,很乐意打印

That *.c is the best C code I have ever seen

这是不可取的.如果没有c文件,是否有一种优雅的方法来修复/表达我想完全跳过循环的事实？

shopt -s nullglob
for f in *.c; do …

请注意,这是一个特定于bash的构造,它在普通sh下不起作用.

日Thnx

If you’re trying to get a object/viewmodel that contains a Byte[]/base64,
i searched in hours for a solution but then i added extra parameter to my viewmodel

public class ProductAddVM
{
    public int Id { get; set; }
    public Categories Category { get; set; }
    public decimal Vat { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
    public IFormFile Image { get; set; }
    public Byte[] ByteImage { get; set; }
    public string Description { get; set; }
    public bool? Available { get; set; }
}

参数Image用于存储可能正如您所述在EDIT中上传的新图像.
而参数ByteImage是从数据库中获取旧图像.

The where you’re done editing you can convert the IFormFile to byte[] and save it in DataBase
I tried to use Mapper but it went wrong,this code is working 100% but i’m gonna make it look better

internal ProductAddVM GetProduct(int id)
    {
        var model = new Product();
        model = Product.FirstOrDefault(p => p.Id == id);
        var viewmodel = new ProductAddVM();
        viewmodel.Id = model.Id;
        viewmodel.Name = model.Name;
        viewmodel.Available = model.Available;
        viewmodel.Description = model.Description;
        viewmodel.Price = model.Price;
        viewmodel.Category = (Categories)model.Category;
        viewmodel.Vat = model.Vat;
        viewmodel.ByteImage = model.Image;
        return viewmodel;
    }


    internal void EditProduct(int id,ProductAddVM viewmodel,int userId)
    {
        var tempProduct = Product.FirstOrDefault(p => p.Id == id);
        tempProduct.Name = viewmodel.Name;
        tempProduct.Available = viewmodel.Available;
        tempProduct.Description = viewmodel.Description;
        tempProduct.Price = viewmodel.Price;
        tempProduct.Category =(int)viewmodel.Category;
        tempProduct.Vat = CalculateVat(viewmodel.Price,(int)viewmodel.Category);
        if (viewmodel.Image != null)
        {
            using (var memoryStream = new MemoryStream())
            {
                viewmodel.Image.copyToAsync(memoryStream);
                tempProduct.Image = memoryStream.ToArray();
            }
        }
        tempProduct.UserId = userId;
        tempProduct.User = User.FirstOrDefault(u => u.Id == userId);

        SaveChanges();
    }