vb.net 如何从vb.net中包含数组的函数中获取元素的索引
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How to get the index of element from contains function of array in vb.net
提问by Sahil Manchanda
i have a list of large number of string elements in array and i am using contains function to check if it contains that element. it is working fine. Now i want to get to know the index/position of element. suppose the array is
我在数组中有大量字符串元素的列表，我正在使用 contains 函数来检查它是否包含该元素。它工作正常。现在我想知道元素的索引/位置。假设数组是
dim s as string() = {"first", "second","third"}
and the string
和字符串
dim l as string = "third"
method
方法
dim b as boolean = s.Contains(l, StringComparer.CurrentCultureIgnoreCase)
flag
旗帜
if (b) Then
messagebox.show("It exists")
end if
above array is just an example. original array consists of 7690 entries and each entry is written in utf-8 and indexOf function is not giving any result
上面的数组只是一个例子。原始数组由 7690 个条目组成，每个条目都用 utf-8 编写，indexOf 函数没有给出任何结果
采纳答案by Eminem
First of all, you should consider using a List(Of T)when writing in VB.Net.
首先，在 VB.Net 中编写时，您应该考虑使用List(Of T)。
The List class provides an List(Of T).IndexOf Method (T).
List 类提供了一个List(Of T).IndexOf Method (T)。
You can do something like this :
你可以这样做：
Dim index As Integer = YourList.IndexOf(l)
回答by ChicagoMike
I believe you're looking for the IndexOf function.
我相信您正在寻找IndexOf 函数。
UPDATE: I came up with the following quick example that encoded a string similar to your example string into UTF-8 and it still works:
更新：我想出了以下快速示例，该示例将类似于您的示例字符串的字符串编码为 UTF-8，但它仍然有效：
Dim s As String() = {"first", "second", "third", "four", "five", "six"}
For Each tempString As String In s
Dim bytes As Byte() = Encoding.Default.GetBytes(tempString)
tempString = Encoding.UTF8.GetString(bytes)
Next
Dim l As String = "six"
Debug.Print(Array.IndexOf(s, l))
