[RESOLVED] Count string

hi,

Can anyone show how to count a string

for example:

dim a as string
a = "abcdefghij"

how can i count the string above
the answer should be 10.:confused:

The String object is a class that has methods and properties. One of the properties of the String class is Length, which returns the length of the string.

When you type "a." you should get a list of methods and properties that are publicly available from that object. A lot of the time, you can find things like this yourself by just looking through the names of the properties and methods.

thanks for the answer..

but how can i eliminate the space between the string?

dim a = "abc def ghij"

the answer should be 10 also..

i using trim function but it doesn't work

any idea?

If you want to get rid of a space you can Replace a space with a blank string.

Here's some code. It uses a textbox, label and button on a form.

Code:

---

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim str As String
        Dim NumberOfCharacters, IndexOfSpace As Integer
        str = TextBox1.Text
        str = str.Trim  ' First remove leading and following spaces from string.
        Do Until str.IndexOf(" ") = -1 ' If " " isn't in the string then str.IndexOf(" ") will give a value of -1
            IndexOfSpace = str.IndexOf(" ") ' Loop until there are no spaces in string
            str = str.Remove(IndexOfSpace, 1)
        Loop
        NumberOfCharacters = str.Length
        Label1.Text = "There are " & NumberOfCharacters & " characters in " & str & "."
    End Sub
End Class

---

' You may want to ignore other characters also:
Public Class Form1
' Ignore spaces, newlines, and tabs
Dim IgnoreChar As String = _
ControlChars.Tab & ControlChars.Cr & ControlChars.Lf & " "

Dim TestString As String = _
"ab c" & ControlChars.Tab & "d" & ControlChars.NewLine & "e"

Dim count As Integer = 0



Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
count = 0
Dim CharacterToInspect As Char
For StringPosition As Integer = 1 To TestString.Length
CharacterToInspect = GetChar(TestString, StringPosition)
If Not IgnoreChar.Contains(CharacterToInspect) Then
count += 1
End If
Next

MsgBox(count) ' Answer = 5

End Sub
End Class

thnks guy :thumb:

Quote:

---

Originally Posted by EntityX

Here's some code. It uses a textbox, label and button on a form.

Code:

---

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim str As String
        Dim NumberOfCharacters, IndexOfSpace As Integer
        str = TextBox1.Text
        str = str.Trim  ' First remove leading and following spaces from string.
        Do Until str.IndexOf(" ") = -1 ' If " " isn't in the string then str.IndexOf(" ") will give a value of -1
            IndexOfSpace = str.IndexOf(" ") ' Loop until there are no spaces in string
            str = str.Remove(IndexOfSpace, 1)
        Loop
        NumberOfCharacters = str.Length
        Label1.Text = "There are " & NumberOfCharacters & " characters in " & str & "."
    End Sub
End Class

---

---

It's a lot easier to just replace the space with a blank string:

Code:

---

TextBox1.Text = TextBox1.Text.Replace(" ","")

---

You are absolutely right Negaivo. That one line of code does what Trim and the Do Loop does. I wasn't aware of Replace. Is that something new to Visual Basic 2008 or perhpas 2005?