Problem in Strings in ASP.NET(vb)

[davidson1]

Hai friends...
In our Organization... we have regno...like 06AKK012 06AK012 06A012

Now my question...whenever user enter regno.. I want to Extract..till last alphabetic charcter of regno...
for example..

06AKK012 => 06AKK
06AK012 => 06AK
06A012 => 06A

is there any option.....
give me coding what we write.... in webform.aspx.vb....
Thank u...
Davidson..

[Plater]

Well if you treated the string as a char[] (which it is in a way) and start sliding to the left, using .IsLetter().
As soon as it says yes, set a boolean value. When it finds a "non letter" after the boolean has been set (so you know it has made it through the alphabetic characters). you can exit out of the loop and return the index that you were on in the char[].

[davidson1]

Thank u plater..

can u give me coding...in asp.net(vb language)

what we write in webform.aspx.vb

Davidson.......

[r035198x]

Thank u plater..

can u give me coding...in asp.net(vb language)

what we write in webform.aspx.vb

Davidson.......

You could go clever and use the Split function with a regex.

[davidson1]

Thank u r035...

if u give sample coding....it will be understandable....

please...

[kunal pawar]

U can convert string to character array and then check character is letter.
like this
Dim c() As Char
Dim i,flg,pos as Int16
flg=1
c = str.ToCharArray
for i=0 to c.length
if flg=2 and c(i).Isnumaric() then
pos = i
exit for
end if
if c(i).IsLetter() then
flg=2
end if

next
substring the string upto pos

[Plater]

if you have a string, you can refer to it just like an array, no need to call .ToCharArray() for it.

[r035198x]

How about

Imports System.Text.RegularExpressions
Module Module1
    Sub Main()
        Dim regNo As String
        regNo = "06AK012"
        Dim r As Regex
        r = New Regex("\D")
        Dim s As String() = Nothing
        s = r.Split(regNo)
        Dim t As String
        t = regNo.Substring(regNo.IndexOf(s(s.Length - 1)))
        Dim v As String
        v = regNo.Substring(0, regNo.IndexOf(t))
        MsgBox(v)
    End Sub
End Module

Washes mouth for writing VB