Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.
Solved
Create a dynamic array in Access VBA and perform actions on it
Posted on 2010-09-09
I would like help performing the following actions in VBA:
1. Create a dynamic array with two columns. Let’s say column A and column B
2. Add a row to the array from the current values of two variables: ProjectID and CStr(frm.Hwnd) to columns A and B respectively.
3. Search the array and retrieve the value of column B based lookup of column A
4. Delete a row in the array that has a specific value in column A
Thank you for any help on this,
Tim
1. Create a dynamic array with two columns. Let’s say column A and column B
2. Add a row to the array from the current values of two variables: ProjectID and CStr(frm.Hwnd) to columns A and B respectively.
3. Search the array and retrieve the value of column B based lookup of column A
4. Delete a row in the array that has a specific value in column A
Thank you for any help on this,
Tim
[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
- +1
5 Comments
Active today
A Dynamic Array is one that is re-dimmed as needed:
Dim arr() as String
'/set multiple columns
Redim Preserve arr(ubound(arr)+1, 1)
arr(0, ubound(arr)) = Me.ProjectID
arr(1, ubound(arr)) = frm.Hwnd
To retrieve this:
Msgbox arr(0, <your array index>)
If you need to locate that value, use a Loop:
Dim i As Integer
For i = 0 to ubound(arr,2)
Msgbox arr(0, i) & " : " & arr(1, i)
Next i
This might help:
http://patorjk.com/programming/tutorials/vbarrays.htm
Dim arr() as String
'/set multiple columns
Redim Preserve arr(ubound(arr)+1, 1)
arr(0, ubound(arr)) = Me.ProjectID
arr(1, ubound(arr)) = frm.Hwnd
To retrieve this:
Msgbox arr(0, <your array index>)
If you need to locate that value, use a Loop:
Dim i As Integer
For i = 0 to ubound(arr,2)
Msgbox arr(0, i) & " : " & arr(1, i)
Next i
This might help:
http://patorjk.com/programming/tutorials/vbarrays.htm
From your description - you are not just storing but searching & deleting.
A collection might be a better choice for your problem.
Maybe you should tell us a bit more about what you're trying to do...
A collection might be a better choice for your problem.
Maybe you should tell us a bit more about what you're trying to do...
I am using Allen Browne's method of opening multiple instances of a form (frmProjects). The problem is if I click a link to open an instance of frmProject, and a form with that ProjectID is already open, it will open another instance and I have two forms open referencing the same ProjectID. I would like to keep a log of ProjectID and the corrusponding frm.Hwnd so I can check if a instance is already open and if so set focus to that open form instead of opening a new one.
If I store the data in a table it would have two fields: ProjectID and Hwnd. Then, before I open a new instance, I will dlookup("Hwnd","tableName"
I would have to append to this table when I open a new instance and delete a record when I close an instance.
It seems to me it would be better to use an array for this instead of a table. I haven't thought about how to use a collection
If I store the data in a table it would have two fields: ProjectID and Hwnd. Then, before I open a new instance, I will dlookup("Hwnd","tableName"
I would have to append to this table when I open a new instance and delete a record when I close an instance.
It seems to me it would be better to use an array for this instead of a table. I haven't thought about how to use a collection
Active today
Sometimes it is useful to write data to a temp table, so it can examined in the interface.
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
It’s the first day of March, the weather is starting to warm up and the excitement of the upcoming St. Patrick’s Day holiday can be felt throughout the world.
In Part II of this series, I will discuss how to identify all open instances of Excel and enumerate the workbooks, spreadsheets, and named ranges within each of those instances.
In Microsoft Access, learn how to use Dlookup and other domain aggregate functions and one method of specifying a string value within a string.
Specify the first argument, which is the expression to be returned:
Specify the second argument, which …
This lesson discusses how to use a Mainform + Subforms in Microsoft Access to find and enter data for payments on orders. The sample data comes from a custom shop that builds and sells movable storage structures that are delivered to your property. …
Suggested Courses
Course of the Month8 days, left to enroll
610 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.