Improve company productivity with a Business Account.Sign Up

x
?
Solved

Iterate a structure to get the names and values of its members

Posted on 2014-01-23
4
Medium Priority
?
316 Views
Last Modified: 2014-01-23
I want to iterate a structure in order to build a string out of the name and value of its members. The following code seems to be what I need but the .GetValue method expects an object parameter that I don't understand:

Dim sb As New System.Text.StringBuilder
Dim t As Type = GetType(myStructure)
For Each f As System.Reflection.FieldInfo In t.GetFields
        sb.AppendLine(f.Name & " = " & f.GetValue(??) & ", ")
Next f

Open in new window

0
Comment
Question by:TimHudspith
4 Comments
 
LVL 40

Accepted Solution

by:
Jacques Bourgeois (James Burger) earned 1600 total points
ID: 39804552
In order to get a value, you need to have an object. The parameter you are wondering about is simply the instance that contains the values.

Supposing that your structure has 2 simple fields x and y, the following code would retrieve the values in object o:

Dim sb As New System.Text.StringBuilder
Dim o As MyStructure
		o.x = 10
		o.y = 20
Dim t As Type = GetType(MyStructure)

For Each f As System.Reflection.FieldInfo In t.GetFields
	sb.AppendLine(f.Name & " = " & f.GetValue(o).ToString & ", ")
Next f

Open in new window

0
 
LVL 64

Assisted Solution

by:Fernando Soto
Fernando Soto earned 200 total points
ID: 39804711
Hi TimHudspith;

This should give you what you need.

Imports System.Reflection

Dim sb As New System.Text.StringBuilder
' Where myStructureTypeName is the Type name of the structure and NOT an instance variable name
Dim t As Type = GetType(myStructureTypeName)

For Each f As FieldInfo In t.GetFields((BindingFlags.Public Or BindingFlags.Instance))
        ' Where myStructureInstanceName is the instance variable of that structure.
        sb.AppendLine(f.Name & " = " & f.GetValue(myStructureInstanceName) & ", ")
Next f

Open in new window

0
 
LVL 28

Assisted Solution

by:Ark
Ark earned 200 total points
ID: 39805503
Just a small addition - for shared members you can use Nothing instead of actual instance
0
 

Author Comment

by:TimHudspith
ID: 39805646
Got it. Thanks all.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

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…
An ASP.NET Web Form User Control is not newly introduced in ASP.NET. In fact, it was an old technology yet still playing a role to generate web content, especially when we want to use it to have a better and easy way to control part of the web conte…
Hi, this video explains a free download that you can incorporate into your Access databases, or use stand-alone for contact management. Contacts -- Names, Addresses, Phone Numbers, eMail Addresses, Websites, Lists, Projects, Notes, Attachments…
Watch the video to know the process of migration of Exchange or Office 365 mailboxes in absence of MS Outlook. It is an eminent tool which can easily migrate Public, Archive user mailboxes from one another Exchange server and Office 365. Kernel Migr…

605 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