vb.net 如何从字符串中取出第一个字符

Question

提问by Gopal

Using VB.Net & SQL Server 2005

使用 VB.Net 和 SQL Server 2005

Dim S as string
s = "Rajan"
s = "Sajan"

I want to take a first character from the string (s)

我想从字符串中取出第一个字符（s）

Expected Output

预期产出

R
S

Need VB.Net Code Help

需要 VB.Net 代码帮助

Answer 1

Try this..

尝试这个..

Dim S As String
S = "RAJAN"
Dim answer As Char
answer = S.Substring(0, 1)

Answer 2

Try this:

尝试这个：

Dim s = "RAJAN"
Dim firstChar = s(0)

You can even do this:

你甚至可以这样做：

Dim firstChar = "RAJAN"(0)

Answer 3

Use chars:

使用字符：

Dim firstChar As char;
firstChar = s.Chars(0);

Answer 4

"ABCDEFG".Firstreturns "A"

"ABCDEFG".First回报 "A"

Dim s as string

s = "Rajan"
s.First
'R

s = "Sajan"
s.First
'S