如何获取textbox1上的第8个数字？ [英] How to get the 8th number on textbox1 ?

问题描述

如何在textbox1上获得第8个号码？我需要写的是这样的。

How do i get the 8th number on textbox1? What i need to write is something like this.

If 8th number on textbox1 = 0 then
   msgbox("OK")
else
   msgbox("INVALID")
end if

请帮忙。谢谢。

Please help. Thank you.

推荐答案

这并不困难：

This is not exactly difficult:

Dim numbers as String
numbers = textbox1.Text
if numbers.length = 8 And numbers(7) = '0' Then
    msgbox("OK")
// etc.

作为 Richard MacCutchan [ ^ ]提到，它很漂亮很简单。



VB.NET使用 String.Substring Method（System） [ ^ ]获取字符串的一部分。



试试！



有关字符串操作的更多信息，请参阅：字符串操作摘要（Visual Basic） [ ^ ]

As Richard MacCutchan[^] mentioned, it's pretty easy.

VB.NET uses String.Substring Method (System)[^] to get part of string.

Try!

For further information about string manipulation, please see: String Manipulation Summary (Visual Basic)[^]

感谢您提示。解决了它。这就是我做的。



Dim x As String

x = TextBox1.Text

txttype.Text = Mid

Thank you for the tips guys. Solved it. This is what i did.

Dim x As String
x = TextBox1.Text
txttype.Text = Mid

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