left, mid and right in vb.net

[ReidarT]

How do I use left, mid and right in vb.net?
regards
reidarT

 

[Simon Jefferies]

Hello,

If you declare a string and you can simply use the functions as follows:-

Dim s As String
s = Left(s, length)
s = Mid(s, start, length)
s = Right(s, length)

Substring function is provided instead of using of the above.

E.g.

Dim s As String
s = s.SubString(start)
s = s.Substring(start, length)

Where start = the index of the character to start from,
and length = the number of characters to take.

Hope this helps,
Simon Jefferies
mailto:simon[nospam]@cooltoolsonline.co.uk
-- remove [nospam] to email me --

 

[Herfried K. Wagner [MVP]]

How do I use left, mid and right in vb.net?

I qualify these methods with the module that contains them:

'Strings.Left', 'Strings.Right', 'Strings.Mid'.

 

[Shiva]

Left:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafctLeft.asp
Right:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafctright.asp
Mid:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafctmid.asp

How do I use left, mid and right in vb.net?
regards
reidarT

 

[ReidarT]

if I use the mid-function, it works, but if I use left-function it does not
work
Here is the code:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim s As String
s = TextBox1.Text
s = Mid(s, 3, 4)
Label1.Text = s
End Sub
reidarT

 

[Simon Jefferies]

Hello,

In what way does it not work?

You seem to be retrieving the middle part of a string from a textbox entry,
where as using the Left function is to return the leftmost characters only.
You may get an error if you try to retrieve letters from a string when there
aren't enough in it?

Regards
Simon Jefferies
mailto:simon[nospam]@cooltoolsonline.co.uk
-- remove [nospam] to email me --

 

[One Handed Man \( OHM - Terry Burns \)]

I enjoy watching these threads, the irritation is muted but obvious
nevertheless ;-)

--

OHM ( Terry Burns )
. . . One-Handed-Man . . .
If U Need My Email ,Ask Me

Time flies when you don't know what you're doing

Hello,

In what way does it not work?

You seem to be retrieving the middle part of a string from a textbox entry,
where as using the Left function is to return the leftmost characters only.
You may get an error if you try to retrieve letters from a string when there
aren't enough in it?

Regards
Simon Jefferies
mailto:simon[nospam]@cooltoolsonline.co.uk
-- remove [nospam] to email me --

if I use the mid-function, it works, but if I use left-function it does
not
work
Here is the code:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim s As String
s = TextBox1.Text
s = Mid(s, 3, 4)
Label1.Text = s
End Sub
reidarT

 

[Guest]

It may be that Left is a property of forms and controls and if this is used
in a Form class, it probably won't work. Try importing Microsoft Visual
Basic like

Imports vb = Microsoft.VisualBasic
You can then use VB.Left(xxx,3) or whatever.