string() 类型的值不能转换为字符串 [英] Value of type string() cannot be converted to string

问题描述

我一直收到这个错误，我尽我所能，但它仍然说String()的值类型不能转换为字符串."

I keep getting this error, I tried all I could but it still says "Value type of String() cannot be converted to string."

代码如下:

Private Sub Label1_Click(sender As Object, e As EventArgs) Handles Label1.Click

End Sub
Sub New()
    InitializeComponent()

    RAN = New Random
    WB = New WebClient


End Sub

Private Const IDNum As String = "https://example.com/Data.php"

Private WB As WebClient
Private RAN As Random

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    Dim Account As String() = WB.DownloadString(IDNum).Split(Environment.NewLine)
    AccSplit(Account(RAN.Next(1, Account.Length)))

End Sub


Private Sub AccSplit(ByVal Account As String)

    TextBox2.Text = Account.Split()
End Sub

推荐答案

当你在这里调用 Split 时:

When you call Split here:

TextBox2.Text = Account.Split()

您正在返回一个 String 数组.不带参数调用 Split 将在空白字符上拆分 String.例如，这个:

You are getting a String array back. Calling Split with no arguments will split the String on whitespace characters. For instance, this:

Dim arr = "Hello World".Split()

相当于:

Dim arr = {"Hello", "World"}

TextBox 的 Text 属性是 String 类型，所以你不能分配一个 String 数组到它.那没有意义.如果你想煎鸡蛋，你把鸡蛋盒放在锅里吗?正确的行动方针取决于您实际想要达到的目标.如果您只希望 String 显示在 TextBox 中，请执行以下操作:

The Text property of a TextBox is type String, so you can't assign a String array to it. That doesn't make sense. If you want to fry an egg, do you put am egg carton in the pan? The correct course of action depends on what you're actually trying to achieve. If you just want that String displayed in the TextBox then do this:

TextBox2.Text = Account

你也可以这样做:

TextBox2.Lines = Account.Split()

显示带有 TexTbox 中不同行元素的数组，假设您已将其 Multiline 属性设置为 True.

to display the array with the elements on separate lines in the TexTbox, which assumes that you have set its Multiline property to True.

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