asp数组如何进行查找

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作者
猴君
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在ASP(Active Server Pages)中,可以使用多种方法来查找数组中的元素。以下是一些常用的方法:

  1. 使用for循环遍历数组

    Dim arr(5) arr(0) = "Apple" arr(1) = "Banana" arr(2) = "Cherry" arr(3) = "Date" arr(4) = "Elderberry" arr(5) = "Fig"  Dim i, foundItem foundItem = "" For i = 0 To UBound(arr)     If arr(i) = "Cherry" Then         foundItem = arr(i)         Exit For     End If Next  Response.Write("Found item: " & foundItem) 
  2. 使用Array.IndexOf方法(仅适用于.NET Framework 3.5及更高版本)

    <%@ Import Namespace="System.Linq" %>  Dim arr(5) arr(0) = "Apple" arr(1) = "Banana" arr(2) = "Cherry" arr(3) = "Date" arr(4) = "Elderberry" arr(5) = "Fig"  Dim foundItem = arr.IndexOf("Cherry")  If foundItem >= 0 Then     Response.Write("Found item: " & arr(foundItem)) Else     Response.Write("Item not found") End If 
  3. 使用Array.Find方法(仅适用于.NET Framework 3.5及更高版本)

    <%@ Import Namespace="System.Linq" %>  Dim arr(5) arr(0) = "Apple" arr(1) = "Banana" arr(2) = "Cherry" arr(3) = "Date" arr(4) = "Elderberry" arr(5) = "Fig"  Dim foundItem = arr.Find(Function(x) x = "Cherry")  If foundItem IsNot Nothing Then     Response.Write("Found item: " & foundItem) Else     Response.Write("Item not found") End If 
  4. 使用for…each循环和Array.Contains方法(仅适用于.NET Framework 3.5及更高版本)

    <%@ Import Namespace="System.Linq" %>  Dim arr(5) arr(0) = "Apple" arr(1) = "Banana" arr(2) = "Cherry" arr(3) = "Date" arr(4) = "Elderberry" arr(5) = "Fig"  Dim foundItem = "" For Each item In arr     If item = "Cherry" Then         foundItem = item         Exit For     End If Next  If foundItem <> "" Then     Response.Write("Found item: " & foundItem) Else     Response.Write("Item not found") End If 

请注意,以上示例中的方法主要适用于.NET Framework 3.5及更高版本。如果您使用的是更早版本的.NET Framework,可能需要使用不同的方法或库来实现数组查找功能。

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