Solved

How to edit structure items on a system.collections.generic list (of )

Posted on 2008-06-17
4
417 Views
Last Modified: 2012-06-27
Hi
I have a quite complex problem where I have an already populated list of a structure and I need to edit the individual items.

Here's an example of code that does not work for me:

Imports System.Collections.Generic
Public Class Form1
    Private Structure myStringStructure
        Dim mystr As String
    End Structure
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim hj As New List(Of myStringStructure)
        hj.Add(New myStringStructure)
        hj(0).mystr = "hmm"

    End Sub
End Class

It tells me that: "Expression is a value and therefore cannot be target of an assignment."
So how do I edit the mystr of the lists entry 0.  ?

Thanks in advance
0
Comment
Question by:liversen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 21

Expert Comment

by:mastoo
ID: 21803240
Imports System.Collections.Generic
Public Class Form1
    Private Structure myStringStructure
        Dim mystr As String
    End Structure
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim hj As New List(Of myStringStructure)
       Dim oNewOne As myStringStructure = new myStringStructure
       oNewOne.myst = "hmmm"
        hj.Add(oNewOne)
    End Sub
End Class
0
 
LVL 24

Accepted Solution

by:
Jeff Certain earned 500 total points
ID: 21806083
Alternately, use a class instead of a structure:

Public Class myStringStructure
      Public mystr As String
End Class

This was you can edit it after you add it.
0
 
LVL 1

Author Closing Comment

by:liversen
ID: 31467963
That was exactly what I was looking for. I could have spent a lot of time trying to solve it and then it appears that the solution is so simple. I guess I just got on to structure instead of class because I'm used to VB 6.
Thanks for the solution
0
 
LVL 24

Expert Comment

by:Jeff Certain
ID: 21806989
Glad to help!
0

Featured Post

Enroll in June's Course of the Month

June’s Course of the Month is now available! Experts Exchange’s Premium Members, Team Accounts, and Qualified Experts have access to a complimentary course each month as part of their membership—an extra way to sharpen your skills and increase training.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

1.0 - Introduction Converting Visual Basic 6.0 (VB6) to Visual Basic 2008+ (VB.NET). If ever there was a subject full of murkiness and bad decisions, it is this one!   The first problem seems to be that people considering this task of converting…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question