从文本框中的一行输入到另一行的单词

Question

I have 5 text boxes marked with NX1, NX2, NX3 .... NX5.

I have a Textbox marked with Textbox2 that contains lines like:

2 4 6 8 11
1 2 3 4 12
3 4 7 9 13
4 5 7 9 14

Is there a possibility to enter the first word / number from TextBox2 Lines (0) in NX1? ie First Word (number 2 in NX1), (Second Word) number 4 in NX2, number 6 in NX3 and number 8 in NX4. and so on.

---

I tried this:

 Dim mytext As String
        Dim counter As Integer
        mytext = TextBox1.Text
        For counter = 1 To Len(TextBox1.Text)
            If Mid$(mytext, counter, 1) = " " Then
                GoTo NextPart
            End If
        Next counter
NextPart:
        MsgBox("'" + Mid$(mytext, 1, counter - 1) + "'")
        MsgBox("'" + Mid$(mytext, 2, counter - 1) + "'")

Answer 1

Get the TextBox.Lines(0) . That's the first line of text. If the text parts are separated by a white space, just Split() the text (white space is the default separator).
If it's not, specify the separator: Split("[SomeChar]"c) .

You'll get 5 strings in a String() array. Assing String(0) to NX1 etc.

Dim FirstLine As String = TextBox2.Lines(0)
Dim AllParts As String() = FirstLine.Split()
NX1.Text = AllParts(0)
NX2.Text = AllParts(1)
'(...)

Repeat the same procedure if you need the other text lines.

You could also use LINQ to perform the string assignments:

AllParts.Select(Function(s, i) Me.Controls("NX" & (i + 1)).Text = s).ToList()

Or, assemble everything in one expression:

TextBox2.Lines(0).Split().Select(Function(s, i) Me.Controls("NX" & (i + 1)).Text = s).ToList()

A description of this method:

[TextBox].Lines(0)    => Returns the first line of text in a TextBoxBase control
Split()               => Splits the text content using the default separator. 
                         Returns an array of String
Select((string, int)) => Selects each string returned by the Split() method and updates
                         the index of each iteration.
                         Performs an action: sets a control`s Text property.
ToList()              => Materializes the Enumerable collection returned by Select()
                         If omitted, in this case, the iteration is performed just once 

Me.Controls("NX" & (i + 1)).Text = s :
Returns a Form 's Control which name is "NX" + a number and assigns a string to its Text property.

Answer 2

You can use String.Split() to split the string.

Dim columns = TextBox2.Lines(0).Split()
For i = 0 To columns.Length - 1
    Controls.Item("NX" & (i + 1)).Text = columns(i)
Next

The Lines property of the TextBox returns a string array containing the lines of the entered text.

String.Split() with no parameters splits a string at white spaces and returns a string array containing the parts (the columns of the first lines in this case).

The Controls property of the form returns a controls collection. The indexed Item property of the controls collection accepts either an Integer index or a control name as String .