List(of String)或Array或ArrayList

Question

希望对大多数具有一定经验的程序员来说是个简单的问题.

什么是允许我这样做的数据类型？

Dim lstOfStrings as *IDK*

Dim String0 As String = "some value"
Dim String1 As String = "some value"
Dim String2 As String = "some value"
Dim String3 As String = "some value"
Dim String4 As String = "some value"
Dim String5 As String = "some value"


lstOfStrings.add(String0, String1, String2, String3)

我会像这样访问这些

Dim s1 = lstOfStrings(0)
Dim s2 = lstOfStrings(1) 
Dim s3 = lstOfStrings(2) 
Dim s4 = lstOfStrings(3)

如果我使用List(of String)我只能在列表中添加一个东西(一次),并且在我的函数中我希望能够存储多个值(一次).

解:

Private Function Foo() As List(Of String)


    Dim temp1 As String
    Dim temp2 As String 
    Dim temp3 As String 

    Dim temp4 As String 
    Dim temp5 As String 
    Dim temp6 As String 

    Dim inputs() As String = {temp1, temp2, temp3, temp4, temp5, temp6}

    Dim lstWriteBits As List(Of String) = New List(Of String)(inputs)


    Return lstWriteBits
End Function

Answer 1

List(Of String)会处理这个问题,主要是 - 虽然您需要使用AddRange添加项目集合,或者Add一次添加一个项目:

lstOfString.Add(String1)
lstOfString.Add(String2)
lstOfString.Add(String3)
lstOfString.Add(String4)

如果您要添加已知值,正如您所示,一个好的选择是使用如下内容:

Dim inputs() As String = { "some value", _
                              "some value2", _
                              "some value3", _
                              "some value4" }

Dim lstOfString as List(Of String) = new List(Of String)(inputs)

' ...
Dim s3 = lstOfStrings(3)

这仍然允许您根据需要稍后添加项目,但也可以快速获取初始值.

编辑:

在您的代码中,您需要修复声明.更改:

Dim lstWriteBits() As List(Of String) 

至:

Dim lstWriteBits As List(Of String) 

目前,您正在声明一个List(Of String)对象数组.

Answer 2

你可以这样做,

  Dim lstOfStrings As New List(Of String) From {"Value1", "Value2", "Value3"}

集合初始化器