从类对象列表创建ListView将返回相同的对象而不是所有C＃UWP

I am attempting to list the List's items but I get repeatedly displayed the first row of the List. The List should contain three different product rows. Instead, ListView shows the same, first row three times.

我试图列出List的项目,但我反复显示List的第一行。列表应包含三个不同的产品行。相反,ListView显示相同的第一行三次。

I create list like this:

我创建这样的列表:

        List<ProductsNumber> ProductsNumberList = new List<ProductsNumber>();
        ProductsNumber _ProductsNumber = new ProductsNumber();
        for (int i= 0; i <= otherlist.Count - 1; i++)

        {
            _ProductsNumber.ProdId = otherlist[i].ProdName.ToString();
            _ProductsNumber.ProductsNumber = (DB_ProductList.Where(Product => Product.ProdId == otherlist[i].ProdName)).Count();
            ProductsNumberList.Add(_ProductsNumber);
        }

        //listView
        listBox.ItemsSource = ProductsNumberList;//Binding data to LISTBOX

And here is the class used to populate List:

这是用于填充List的类:

 public class ProductsNumber
    {
        public string ProdId { get; set; }
        public int ProductsNumber { get; set; }
    }

If you are interested:

如果你感兴趣:

otherlist

works just fine when I list it in listview.

当我在listview中列出它时工作得很好。

DB_ProductList is defined like this:

DB_ProductList的定义如下:

ReadAllProductsList dbproduct = new ReadAllProductsList();
        DB_ProductList = dbdproduct.GetAllProducts();
        List<Product> ProductList = new List<Product>();
        ProductList = DB_ProductList.ToList();

and it works well too. Anyway, I get correct ProductNumber in ListView. It's the ProdId that gives me problems. I get indeed correct number of iterations in ListView, but they all are the same. ListView should list all Products, and not repeat the same one.

而且效果也很好。无论如何,我在ListView中得到正确的ProductNumber。这是ProdId给我带来的问题。我在ListView中获得了正确的迭代次数,但它们都是相同的。 ListView应列出所有产品,而不是重复相同的产品。

Any clue?

I am guessing that when populating List the same record is inserted three times. But why?

我猜测在填充List时,会插入三次相同的记录。但为什么?

2 个解决方案

#1

Oh, I solved the mystery. Simply, moved the

哦,我解开了这个谜。简单地说,感动了

ProductsNumber _ProductsNumber = new ProductsNumber();

line inside the for loop and it works fine now. Silly me.

for循环中的行,现在工作正常。傻我。

#2

Can you try write "ProductsNumber _ProductsNumber = new ProductsNumber();" into the loop?

你能尝试写“ProductsNumber _ProductsNumber = new ProductsNumber();”进入循环?

#1