vb.net在textbox中二维数组的读取和写入

在学习中遇到从列表框读取多维数组的问题，例如在textbox中有一个二维数组如下

那么如何将其写入数组array1（，）中呢。在这个问题中主要遇到的问题是将文本框中vb.net教程数组按行（vbcrlf）和空格（“ ”）分别split一次，在textbox的属性中有lines可以轻松的读取改行的信息。故创建如下ui及代码进行实验。

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        TextBox2.Text = TextBox1.Lines(1)
        TextBox3.Text = TextBox1.Lines.Count
        Dim array1() As String
        Dim array2(,) As String
        Dim i, k, m As Integer
        array1 = Split(Trim(TextBox1.Lines(0)), " ")
        i = TextBox1.Lines.GetUpperBound(0)
        For k = 0 To i
            array1 = Split(Trim(TextBox1.Lines(k)), " ")
            m = array1.GetUpperBound(0)
            ReDim Preserve array2(i, m)
            For j As Integer = 0 To m
                array2(k, j) = array1(j)
            Next

        Next
        Dim z, x As Integer
        For z = 0 To array2.GetUpperBound(0)
            For x = 0 To array2.GetUpperBound(1)
                TextBox4.Text += array2(z, x) & " "
            Next
            TextBox4.Text += vbCrLf
        Next
    End Sub
End Class