38 lines
1.3 KiB
Markdown
38 lines
1.3 KiB
Markdown
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---
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title: Any
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localeTitle: 任何
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---
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# 任何
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如果至少有一个元素与谓词匹配，则返回true。 当使用空谓词（只有.Any（），而没有任何东西）时，如果集合不为空，它将返回true。
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### 签名
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```csharp
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public static bool Any<TSource>(this IEnumerable<TSource> source);
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public static bool Any<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate);
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```
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## 例
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```csharp
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var fruits = new List<Fruit>() {
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new Fruit() { Id = 1, Name = "Orange", Color = "Orange", Quantity: 3 },
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new Fruit() { Id = 2, Name = "Strawberry", Color = "Red", Quantity: 12 },
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new Fruit() { Id = 3, Name = "Grape", Color = "Purple", Quantity: 25 },
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new Fruit() { Id = 4, Name = "Pineapple", Color = "Yellow", Quantity: 1 },
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new Fruit() { Id = 5, Name = "Apple", Color = "Red", Quantity: 5 },
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new Fruit() { Id = 6, Name = "Mango", Color = "Yellow", Quantity: 2 }
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};
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// Check if any Fruits have a quantity greater than 20
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var anyFruitGreaterThanTwenty = fruits.Any(f => f.Quantity > 20); // true
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// Any Fruit with color Green
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var anyGreen = fruits.Any(f => f.Color == "Green"); // false
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var hasFruits = fruits.Any(); // true
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var hasYellowFruit = fruits.Any(f => f.Color == "Yellow"); // true
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```
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