VB.NET 中带有字符串数组的 IndexOf

IndexOf with String array in VB.NET

提问by Eugene

How would I find the index of an item in the string array in the following code:

我将如何在以下代码中找到字符串数组中项目的索引：

Dim arrayofitems() as String
Dim itemindex as UInteger
itemindex = arrayofitems.IndexOf("item test")
Dim itemname as String = arrayofitems(itemindex)

I'd like to know how I would find the index of an item in a string array. (All of the items are lowercase, so case shouldn't matter.)

我想知道如何在字符串数组中找到项目的索引。（所有项目都是小写，所以大小写无关紧要。）

回答by Hans Olsson

It's a static (Shared) method on the Arrayclass that accepts the actual array as the first parameter, as:

它是类Shared上的一个静态 ( ) 方法，Array它接受实际数组作为第一个参数，如下所示：

Dim arrayofitems() As String
Dim itemindex As Int32 = Array.IndexOf(arrayofitems, "item test")
Dim itemname As String = arrayofitems(itemindex)

MSDN page

MSDN页面

回答by Ito

Array.FindIndex(arr, (Function(c As String) c=strTokenKey)

Array.FindIndex(arr, (Function(c As String) c.StartsWith(strTokenKey)))

回答by Oded

IndexOfwill return the index in the array of the item passed in, as appears in the third line of your example. It is a static (shared) method on the Arrayclass, with several overloads- so you need to select the correct one.

IndexOf将返回传入项的数组中的索引，如示例的第三行所示。它是类上的一个静态（共享）方法Array，具有多个重载- 因此您需要选择正确的一个。

If the array is populated and has the string "item test" as one of its items then the following line will return the index:

如果数组已填充并且将字符串“item test”作为其项目之一，则以下行将返回索引：

itemindex = Array.IndexOf(arrayofitems, "item test")

回答by epotter

For kicks, you could use LINQ.

对于踢球，您可以使用LINQ。

Dim items = From s In arrayofitems _
        Where s = "two" _
        Select s Take 1

You would then access the item like this:

然后，您将像这样访问该项目：

items.First