• 0

String Test in VB.NET


Question

I am suppose to create an application that displays the first letter, last letter, and middle letter of a word or phrase. This is my code so far:

'Jane Lewis

'String Test

'Displays the first letter, last letter, and middle letter of a word or phrase

Public Class frmStringTest

Private Sub btnDisplayData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayData.Click

Dim word As String

Dim firstLetter As String

Dim secondLetter As String

Dim lastLetter As String

Dim numLetters As Integer

?

word = Me.txtPhrase.Text

word = word.ToLower

numLetters = word.Length

End Sub

End Class

 

What else do I need?

We are working on Strings this week, and I am not understanding Strings very well, and they are confusing to me. I ask my teacher for an one on one explanation, but my Programming teacher didn't make it any clearer.If you give me the for this problem, can you explain why you do this and that, please. Thank you.

 

Link to comment
https://www.neowin.net/forum/topic/1203365-string-test-in-vbnet/
Share on other sites

15 answers to this question

Recommended Posts

  • 0

http://msdn.microsoft.com/en-us/library/system.string(v=vs.110).aspx?cs-save-lang=1&cs-lang=vb#code-snippet-1

 

Take a look at the "Properties" section for something that might help. It sounds like you want the character at the first position in the String as well as the last position and somewhere halfway...

  • 0
  On 04/03/2014 at 18:31, Jane Lewis said:

I am suppose to create an application that displays the first letter, last letter, and middle letter of a word or phrase. This is my code so far:

'Jane Lewis

'String Test

'Displays the first letter, last letter, and middle letter of a word or phrase

Public Class frmStringTest

Private Sub btnDisplayData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayData.Click

Dim word As String

Dim firstLetter As String

Dim secondLetter As String

Dim lastLetter As String

Dim numLetters As Integer

?

word = Me.txtPhrase.Text

word = word.ToLower

numLetters = word.Length

End Sub

End Class

 

What else do I need?

We are working on Strings this week, and I am not understanding Strings very well, and they are confusing to me. I ask my teacher for an one on one explanation, but my Programming teacher didn't make it any clearer.If you give me the for this problem, can you explain why you do this and that, please. Thank you.

If you look at a string as a list of chars, you just need the first character which starts at 0 then the last, given to you by word.Length, and then the middle which would be word.Length divided by 2.  

 

http://msdn.microsoft.com/en-us/library/hxthx5h6(v=vs.110).aspx

  • 0
  On 04/03/2014 at 18:31, Jane Lewis said:

I am suppose to create an application that displays the first letter, last letter, and middle letter of a word or phrase. This is my code so far:

'Jane Lewis

'String Test
'Displays the first letter, last letter, and middle letter of a word or phrase
Public Class frmStringTest
Private Sub btnDisplayData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayData.Click
Dim word As String
Dim firstLetter As String
Dim secondLetter As String
Dim lastLetter As String
Dim numLetters As Integer
?
word = Me.txtPhrase.Text
word = word.ToLower
numLetters = word.Length
End Sub
End Class

What else do I need?

We are working on Strings this week, and I am not understanding Strings very well, and they are confusing to me. I ask my teacher for an one on one explanation, but my Programming teacher didn't make it any clearer.If you give me the for this problem, can you explain why you do this and that, please. Thank you.

 

You should read up on strings.

Now there are several approaches to this.. I would recommend this way:

Public Class Form1

    Dim myString As String
    Dim stringLen As Integer
    Dim firstChar As String
    Dim lastChar As String
    Dim middleLetter As String
    Dim saveMYVars As Boolean
    Dim anothervar As Double
    Dim learntocode As String

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        myString = "Firey is the best coder ever"

        'step 1, get the string length
        Dim counter As Integer
        For counter = 0 To myString.Length
            stringLen = stringLen + 1
        Next counter

        'step 2, find the first letter
        firstChar = myString.Substring(0, 1)

        'step 3 last letter
        lastChar = myString.Substring(stringLen - 2, 1)

        'step 4, ensure we have the right letters
        firstChar = myString(0)
        lastChar = myString(stringLen - 2)

        'Step 5 get the middle letter.
        For counter = 1 To myString.Length / 2
            middleLetter = myString.Substring(counter - 1, 1)
        Next counter

        'Step 6, verify it's the middle letter
        middleLetter = myString(stringLen / 2)

        'Step 7, save the variables off so the computer doesn't forget
        saveMYVars = True 'this is critical in any VB Program

        'step 8, show it
        If (saveMYVars) Then
            MessageBox.Show("Firster")
            MessageBox.Show(myString(0))
            MessageBox.Show("Middleer")
            MessageBox.Show(myString.Substring(counter - 1, 1))
            MessageBox.Show("Laster")
            MessageBox.Show(lastChar)
        End If
    End Sub
End Class

The code above is tested and working.

  • 0
  On 04/03/2014 at 18:56, firey said:

You should read up on strings.

Now there are several approaches to this.. I would recommend this way:

Public Class Form1

    Dim myString As String
    Dim stringLen As Integer
    Dim firstChar As String
    Dim lastChar As String
    Dim middleLetter As String
    Dim saveMYVars As Boolean
    Dim anothervar As Double
    Dim learntocode As String

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        myString = "Firey is the best coder ever"

        'step 1, get the string length
        Dim counter As Integer
        For counter = 0 To myString.Length
            stringLen = stringLen + 1
        Next counter

        'step 2, find the first letter
        firstChar = myString.Substring(0, 1)

        'step 3 last letter
        lastChar = myString.Substring(stringLen - 2, 1)

        'step 4, ensure we have the right letters
        firstChar = myString(0)
        lastChar = myString(stringLen - 2)

        'Step 5 get the middle letter.
        For counter = 1 To myString.Length / 2
            middleLetter = myString.Substring(counter - 1, 1)
        Next counter

        'Step 6, verify it's the middle letter
        middleLetter = myString(stringLen / 2)

        'Step 7, save the variables off so the computer doesn't forget
        saveMYVars = True 'this is critical in any VB Program

        'step 8, show it
        If (saveMYVars) Then
            MessageBox.Show("Firster")
            MessageBox.Show(myString(0))
            MessageBox.Show("Middleer")
            MessageBox.Show(myString.Substring(counter - 1, 1))
            MessageBox.Show("Laster")
            MessageBox.Show(lastChar)
        End If
    End Sub
End Class

The code above is tested and working.

May I ask why you set counter = 0

And I am a visual learner I have to see it done, and then I will get it.

  • 0

To be completely honest with you, my code is crazy convoluted (to get you thinking about what is happening).  You can do your entire project in 4 lines with only 1 variable. 

Think of strings as an array of chars.  You access arrays using indexes.

Index 0 = first
Index (length - 1) = last
Index (length / 2 - 1) = middle.

Imagine your string is an array (I show examples of it in my code).  Use what I wrote above (substituting length for that actual string length) to achieve what you want.

If I was to write the code in C# it would be something simple ie)

string myString = "myString";
MessageBox.Show("Firster: " + myString[0].toString() + " Middle Letter: " + myString[(myString.Length / 2) - 1].ToString() + " Last Letter: " + myString[myString.Length - 1],"Parts of a string"); 

  • 0
  On 04/03/2014 at 19:11, snaphat (Myles Landwehr) said:

You guy shouldn't be giving outright solutions. This is a homework assignment...

I agree, hence my code is so convoluted no teacher would ever accept it.  It is also 4 different ways of solving it with random ###### that does nothing.

  • 0
  On 04/03/2014 at 19:08, firey said:

To be completely honest with you, my code is crazy convoluted (to get you thinking about what is happening).  You can do your entire project in 4 lines with only 1 variable. 

Think of strings as an array of chars.  You access arrays using indexes.

Index 0 = first

Index (length - 1) = last

Index (length / 2 - 1) = middle.

Imagine your string is an array (I show examples of it in my code).  Use what I wrote above (substituting length for that actual string length) to achieve what you want.

If I was to write the code in C# it would be something simple ie)

string myString = "myString";

MessageBox.Show("Firster: " + myString[0].toString() + " Middle Letter: " + myString[(myString.Length / 2) - 1].ToString() + " Last Letter: " + myString[myString.Length - 1],"Parts of a string"); 

I think I got a better understanding of Strings now, thank you. You should be a teacher yourself.

  • 0
  On 04/03/2014 at 19:15, firey said:

I agree, hence my code is so convoluted no teacher would ever accept it.  It is also 4 different ways of solving it with random #### that does nothing.

 

  On 04/03/2014 at 19:08, firey said:

To be completely honest with you, my code is crazy convoluted (to get you thinking about what is happening).  You can do your entire project in 4 lines with only 1 variable. 

Think of strings as an array of chars.  You access arrays using indexes.

Index 0 = first

Index (length - 1) = last

Index (length / 2 - 1) = middle.

Imagine your string is an array (I show examples of it in my code).  Use what I wrote above (substituting length for that actual string length) to achieve what you want.

If I was to write the code in C# it would be something simple ie)

string myString = "myString";

MessageBox.Show("Firster: " + myString[0].toString() + " Middle Letter: " + myString[(myString.Length / 2) - 1].ToString() + " Last Letter: " + myString[myString.Length - 1],"Parts of a string"); 

This is the final code I have:

Public Class frmStringTest

Private Sub btnDisplayData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayData.Click

Dim myString As String = Me.txtPhrase.Text 'declares the phrase enter by the user as a string

Dim stringLen As Integer 'declares as a string

Dim firstletter As String 'declares as a string

Dim lastletter As String 'declares as a string

Dim middleLetter As String 'declares as a string

Dim counter As Integer 'decalres counter as an Integer

For counter = 0 To myString.Length 'The counter starts at O to how many characters/letters are in the word/phrase

stringLen = stringLen + 1 'Goes up by 1

Next counter

'finding the first letter

firstletter = myString.Substring(0, 1)

Me.lblFirstAnswer.Text = firstletter 'Letter/character for the first letter will display here

'Finding the last letter

lastletter = myString.Substring(stringLen - 2, 1)

Me.lblLastAnswer.Text = lastletter 'Letter/character for the last letter will display here

'Ensures that I have the right letters

firstletter = myString(0)

lastletter = myString(stringLen - 2)

'Finding the middle letter.

For counter = 1 To myString.Length / 2

middleLetter = myString.Substring(counter - 1, 1)

Next counter

'Step 6, verify it's the middle letter

middleLetter = myString(stringLen / 2 - 1)

Me.lblMiddleAnswer.Text = middleLetter

End Sub

End Class

  • 0

Hello,

  On 04/03/2014 at 19:02, Jane Lewis said:

May I ask why you set counter = 0

And I am a visual learner I have to see it done, and then I will get it.

We already gave you that once. You should know some basic VB .NET functions a month later.

  On 04/03/2014 at 19:11, snaphat (Myles Landwehr) said:

You guy shouldn't be giving outright solutions. This is a homework assignment...

Once, IMO, OK. Twice, no. But then I guess firey (nothing against you firey :) ) is allowed to give 90% of the solution instead of 100% :huh:

Anyways, looking at this: http://msdn.microsoft.com/en-us/library/hxthx5h6%28v=vs.110%29.aspx should be MORE than enough to help you out.

  • 0
  On 11/03/2014 at 16:20, riahc3 said:

Hello,

We already gave you that once. You should know some basic VB .NET functions a month later.

Once, IMO, OK. Twice, no. But then I guess firey (nothing against you firey :) ) is allowed to give 90% of the solution instead of 100% :huh:

Anyways, looking at this: http://msdn.microsoft.com/en-us/library/hxthx5h6%28v=vs.110%29.aspx should be MORE than enough to help you out.

I didn't realize this was the second post.  However yea I am not going to give a 100% answer.  People do need to learn for themselves and I agree fully.   At the same time though, simply redirecting people to another resource doesn't do much especially when you don't know wtf you are looking at.

So I figured I'd give some ridiculous answer, and she could go through with a deubgger and test each line and see what happens.

  • 0

Hello,

  On 11/03/2014 at 16:25, firey said:

At the same time though, simply redirecting people to another resource doesn't do much especially when you don't know wtf you are looking at.

A month later the person should already know a basic function in VB .NET

I understand at first functions can surprise you but a month later......Basic things like Substring are not really hard.

http://lmgtfy.com/?q=how+to+use+substring+function+in+vb+.net

Just looking at Google pretty much lays it down.

  • 0
  On 11/03/2014 at 16:29, riahc3 said:

Hello,

A month later the person should already know a basic function in VB .NET

I understand at first functions can surprise you but a month later......Basic things like Substring are not really hard.

http://lmgtfy.com/?q=how+to+use+substring+function+in+vb+.net

Just looking at Google pretty much lays it down.

As I say, I didn't realize that this was already asked a month ago by the same person.  You are right, basic things aren't hard and for the most part are easy to grasp.  

  • 0

Hello,

  On 11/03/2014 at 16:32, firey said:

As I say, I didn't realize that this was already asked a month ago by the same person.  You are right, basic things aren't hard and for the most part are easy to grasp.

The only reason I came into this thread is because I was in that thread so its normal you didnt notice :)

Also, he "left" the previous thread; No solved, no thanks, nothing.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Men are real idiots justifying using any nuclear arms.  
    • OBS Studio 31.1.0 RC1 by Razvan Serea OBS Studio is software designed for capturing, compositing, encoding, recording, and streaming video content, efficiently. It is the re-write of the widely used Open Broadcaster Software, to allow even more features and multi-platform support. OBS Studio supports multiple sources, including media files, games, web pages, application windows, webcams, your desktop, microphone and more. OBS Studio Features: High performance real time video/audio capturing and mixing, with unlimited scenes you can switch between seamlessly via custom transitions. Live streaming to Twitch, YouTube, Periscope, Mixer, GoodGame, DailyMotion, Hitbox, VK and any other RTMP server Filters for video sources such as image masking, color correction, chroma/color keying, and more. x264, H.264 and AAC for your live streams and video recordings Intel Quick Sync Video (QSV) and NVIDIA NVENC support Intuitive audio mixer with per-source filters such as noise gate, noise suppression, and gain. Take full control with VST plugin support. GPU-based game capture for high performance game streaming Unlimited number of scenes and sources Number of different and customizable transitions for when you switch between scenes Hotkeys for almost any action such as start or stop your stream or recording, push-to-talk, fast mute of any audio source, show or hide any video source, switch between scenes,and much more Live preview of any changes on your scenes and sources using Studio Mode before pushing them to your stream where your viewers will see those changes DirectShow capture device support (webcams, capture cards, etc) Powerful and easy to use configuration options. Add new Sources, duplicate existing ones, and adjust their properties effortlessly. Streamlined Settings panel for quickly configuring your broadcasts and recordings. Switch between different profiles with ease. Light and dark themes available to fit your environment. …and many other features. For free. At all. OBS Studio 31.1.0 RC1 changelog: Fixed an issue where a Browser Source or Browser Dock would crash OBS Studio on macOS 13 or older [jcm93/PatTheMav/RytoEX] Fixed an issue where browser error pages could not scroll [WizardCM] Fixed an issue on macOS where menu items would launch unintended actions when OBS was set to certain languages [gxalpha] Fixed an issue in Beta 1-2 where the group icon in the Sources list was not positioned correctly in the System theme [shiina424] Fixed an issue in Beta 2 where the preview zoom button tooltip translations were incorrect [shiina424] Download: OBS Studio 31.1.0 RC1 | Portable | ARM64 | ~200.0 MB (Open Source) View: OBS Studio Homepage | Other Operating Systems | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • Nice little improvement One improvement I would like to see. Being able to use a voice commands in Firefox "Firefox, 2FA (enter a 2FA code)". "Firefox, Close all tabs right" "Firefox, Pin tab" "Firefox, Bookmarks (name of Bookmark to open a Bookmark)" "Firefox, Settings, X" among others.
    • Microsoft Defender XDR gets TITAN-powered Security Copilot recommendations by Paul Hill Guided Response, a Copilot-powered capability in Microsoft Defender XDR that guides analysts through step-by-step investigation and response flows, is getting a big upgrade with the introduction of TITAN recommendations. With TITAN, Microsoft wants to give security analysts real-time, threat-intel-driven recommendations so they can better prepare against attacks, before they even happen. TITAN is an adaptive threat intelligence graph that uses data from first and third-party telemetry and employs guilt-by-association techniques to warn analysts about unknown IP addresses that could pose a threat, due to their association with known malicious addresses. The primary benefit of TITAN is that security analysts get faster warnings about potential threats before they even have a chance to cause a problem. TITAN is an enhancement of Security Copilot Guided Response, rather than a replacement to it. With this extra tool, security analysts will be able to better keep up with evolving threats. Understanding TITAN's AI-powered threat intelligence The Redmond giant said that TITAN “represents a new wave of innovation” built upon its threat intelligence capabilities that introduces a real-time, adaptive threat intelligence graph. It takes telemetry from first and third-party sources such as Microsoft Defender for Threat Intelligence, Microsoft Defender for Experts, and customer feedback. The graph uses guilt-by-association techniques to mark unknown devices as threats, if they’re associated with known malicious entities. This gives security analysts a window of opportunity to take action and prevent harm. To identify potential threats, Microsoft uses a semi-supervised label propagation technique that assigns reputation scores to nodes based on the score of their neighbors. These reputation scores allow Microsoft’s unified security operation platform to implement containment and remediation actions via attack disruption. Practical impact and future outlook The new TITAN suggestion now appears within Guided Response as triage and containment recommendations. When a suspicious IP is detected, a Guided Response recommendation is automatically generated. These can help security analysts deal with various threats including IP addresses, IP ranges, and email senders. Microsoft said in early testing its TITAN recommendations have shown good results. TITAN boosted Guided Response triage accuracy by 8%, it reduced the time needed to investigate and respond to incidents, and its explainable recommendations gave analysts more confidence in the actions they take. As threats become more sophisticated, Microsoft’s TITAN will help to tackle threats before they even become an issue.
    • China wants the tech... if they were to invade, TSMC would destroy it's fabs and other critical information first. Plus, you can bet they have backups stored NOT in Taiwan.
  • Recent Achievements

    • Enthusiast
      Motoman26 went up a rank
      Enthusiast
    • Mentor
      M. Murcek went up a rank
      Mentor
    • Explorer
      treker_ed went up a rank
      Explorer
    • Apprentice
      CHUNWEI went up a rank
      Apprentice
    • Veteran
      1337ish went up a rank
      Veteran
  • Popular Contributors

    1. 1
      +primortal
      677
    2. 2
      ATLien_0
      267
    3. 3
      Michael Scrip
      177
    4. 4
      +FloatingFatMan
      176
    5. 5
      Steven P.
      139
  • Tell a friend

    Love Neowin? Tell a friend!