通用列表不会出现

发布于 2024-12-07 21:39:32 字数 908 浏览 0 评论 0原文

此示例使用 where 查找所有缺货的产品。

public void Linq2()
{
    List<Product> products = GetProductList();

    var soldOutProducts =
        from p in products
        where p.UnitsInStock == 0
        select p;

    Console.WriteLine("Sold out products:");
    foreach (var product in soldOutProducts)
    {
        Console.WriteLine("{0} is sold out!", product.ProductName);
    }
}

结果：

售完产品：

安东厨师的秋葵浓汤已售完！
爱丽丝羊肉卖完了！
图林格州腊肠已售完！
戈贡佐拉泰利诺 (Gorgonzola Telino) 已售罄！
珀斯馅饼卖完了！

上面的例子是我从MSDN Samples得到的，这是Simple2，问题当我输入 List 时，Products 未显示在 Intellisense 中。当我手动输入时，出现以下错误：

仅限赋值、调用、递增、递减和新建对象表达式可以用作语句

我能做些什么来解决这个问题？

原文

This sample uses where to find all products that are out of stock.

public void Linq2()
{
    List<Product> products = GetProductList();

    var soldOutProducts =
        from p in products
        where p.UnitsInStock == 0
        select p;

    Console.WriteLine("Sold out products:");
    foreach (var product in soldOutProducts)
    {
        Console.WriteLine("{0} is sold out!", product.ProductName);
    }
}

Result:

Sold out products:

Chef Anton's Gumbo Mix is sold out!
Alice Mutton is sold out!
Thüringer Rostbratwurst is sold out!
Gorgonzola Telino is sold out!
Perth Pasties is sold out!

The above example i got from MSDN Samples, this is Simple2, the problem is when I enter List<Products>, Products is not showing in Intellisense. When I enter it manually, I get the following error:

Only assignment, call, increment, decrement and new object expression
can be used as a statement

What can I do to solve this?

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成熟的代价 2024-12-14 21:39:32

好的，

您的问题是您复制了链接的源。但此源代码既不包含 Product 也不包含 GetProductList() 的定义

请查看示例此处 - 它拥有您需要的一切：

List<string> fruits =
    new List<string> { "apple", "passionfruit", "banana", "mango", 
                    "orange", "blueberry", "grape", "strawberry" };

IEnumerable<string> query = fruits.Where(fruit => fruit.Length < 6);

foreach (string fruit in query)
{
    Console.WriteLine(fruit);
}

Ok,

your problem is that you copied the linked source. But this source does not contain the definitions for neither Product nor GetProductList()

Please take a look at the example here - it has everything you need:

List<string> fruits =
    new List<string> { "apple", "passionfruit", "banana", "mango", 
                    "orange", "blueberry", "grape", "strawberry" };

IEnumerable<string> query = fruits.Where(fruit => fruit.Length < 6);

foreach (string fruit in query)
{
    Console.WriteLine(fruit);
}

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