Left function

[Guest]

I am attempting to collect the user's IP address from a Web App. I then need
to verify the address is not an 'internal' user. I need to compare the left 3
characters of the IP address with a constant. I know I have done this with
the left function in VB. I can't seem to locate a similar function in C#. Can
someone assist?

if (Session["UserIP"].ToString() == "22.")

 

[Guest]

Look at String.StartsWith().

 

[Stoitcho Goutsev \(100\)]

You can do in different ways:
you can :
1. Use string.Substring; to get the idex of first dot you can use
string.IndexOf

2. You can split the string on dots - string.Split('.') and get an array of
IP parts.

3. You can use string.StartsWith("22.") if the "22." is the only option.