Vb.net 如何拆分字符串以获取字符串中的最后一个单词或两个单词，但不知道字符数或结束单词数？

要比标题更具体。。。下面是一个要使用的字符串示例：“You have received Doe from John Doe”根据字符串的名或名和姓，我需要只获取John或John Doe的名字。下面是我在字符串中显示John Doe的代码，但它只得到John，而不是John Doe的全名。我正在使用Visual Basic 2010。有人能帮忙吗

Dim myString As String = "You have received 25 dollars from John Doe"

Dim fields() As String = myString.Split(" ")

Dim numberDollars As String = fields(3).Substring(0)

Dim nameDonated As String = fields(6).Substring(0)

' outputs John donated 25 dollars
TextBox1.Text = nameDonated & " donated " & numberDollars & " dollars."

---

因为它总是采用相同的格式，“您从y收到了x美元”，所以可以基于该格式拆分字符串

Dim myString As String = "You have received 25 dollars from John Doe"
' split into {"You have received 25 dollars", "John Doe"}
Dim mySplitString1 As String() = myString.Split(New String() {" from "}, 0)
' and take the second item which has the name
Dim donorName As String = mySplitString1(1)
' then split the first item into {"You", "have", "received", "25", "dollars"}
Dim mySplitString2 As String() = mySplitString1(0).Split(" ")
' and take the fourth item which has the amount
Dim dollarAmount As Single = Single.Parse(mySplitString2(3))

TextBox1.Text = String.Format("{0} donated {1:0} dollars", donorName, dollarAmount)

有时候最简单的答案就是最好的。使用原始代码，将名称分配更改为

Dim nameDonated As String = fields(6) & If(fields.Length = 8, " " & fields(7), "")

---

你明白为什么用“john”代替全名吗？是的，字段6进入第六个空格并从那里开始。。。子字符串0是下一个单词的结尾。我需要的代码，以知道是否有2个字或1个字，这取决于该人输入的只是名字或名字和姓氏。我想我可以做一个nameDonated1和nameDonated2，然后模糊另一个语句，把它们放在一起。。。但我希望有一种比这更好的方法，在网络中没有任何东西可以区分动词、名词、冠词和其他任何东西。此外，你的

子字符串

没有做任何你想做的事情。。。我试着去掉了。子字符串，但它仍然有效。感谢您解释我的子字符串没有做任何事情。它总是以“您从y收到了x美元”的形式出现吗？

Dim name捐赠为String=fields（6）&If（fields.Length=8，“&fields（7），”）

works tooDim name捐赠为String=fields（6）&If（fields.Length=8，“&fields（7），”）工作起来就像做梦一样。非常感谢Verdolino对我的帮助。：）