collection vba excel PDF Cours,Exercices ,Examens
Microsoft Excel VBA and Macros (Office 2021 and Microsoft 365)
CHAPTER 6 Creating and manipulating names in VBA 97 CHAPTER 7 Event programming 111 CHAPTER 8 Arrays 125 CHAPTER 9 Creating classes and collections 133 CHAPTER 10 Userforms: An introduction 153 CHAPTER 11 Data mining with Advanced Filter 175 CHAPTER 12 Using VBA to create pivot tables 211 CHAPTER 13 Excel power 257 |
VBA pour Excel
fonctionnalités avancées d’Excel Cette expérience complète et va-riée lui permet de proposer un livre très pragmatique sur VBA Excel VBA pour Excel - Créez des applications professionnelles ISBN : 978-2-409-01792-6 ISSN 1765-7334 27 € Les chapitres du livre Avant-propos• Procédures • Variables • Constantes • |
What is a collection in VBA?
Collections are a very useful part of VBA. There are much easier to use than Arrays and are very useful when you are doing a lot of adding and removing items. They have only four properties: Add, Remove, Count and Item. This makes them very easy to master. Collections are a way of storing a group of items together.
How do I address a specific worksheet in a VBA collection?
You can also address a specific worksheet in the collection using the index value (it’s position in the collection), or the actual name of the worksheet: As worksheets are added or deleted so the Sheets collection grows or shrinks in size. Note that with VBA collections the index number begins with 1 not with 0.
How to sort a VBA collection?
There is no built-in sort for the VBA collection. However we can use this QuickSort Using a Collection as a parameter or return value is very easy to do. We will look at them in turn. It is simple to pass a collection to a function or sub. It is passed like any parameter as the following code example shows:
How does VBA resize a collection?
When you add or remove an item to a collection VBA does all the resizing for you. You don’t have to specify the size or allocate new spaces. VBA does it under the hood. All you have to do is add an item or remove it. Collections are much easier to use than arrays especially if you are new to programming.
Introduction
Collections are a very important part of VBA. If you have used the language for any length of time then you will have used Collections. The most common ones are the Workbooks, Worksheets, Range and Cells collections. The following code shows some examples of using the VBA Workbookscollection: Collections are similar to arrays so it is important to
Collections Webinar
If you are a member of the website, click on the image below to view the webinar. (Note: Website members have access to the full webinar archive.) excelmacromastery.com
What Is A Collection?
Collections and arrays are both used to group variables. They both store a set of similar items e.g. a list of student marks or country names. Using a collection or array allows you to quickly and easily manipulate a large number of items. In my post on arrays,I explained in simple terms what arrays are and why they are so useful. I will briefly re
Collections vs arrays?
We have looked at what collections and arrays have in common. So what is the difference and why use one over the other? The main difference is that with an array you normally set the size once. This means that you know the size before you start adding elements. Let me explain this with an example. excelmacromastery.com
How to Create A Collection
You can declare and create in one line as the following code does As you can see you don’t need to specify the size. Once your collection has been created you can easily add items to it. You can also declare and then create the collection if and when you need it. excelmacromastery.com
Removing All Items from A Collection
The Collection does not have a RemoveAllfunction. However to remove all items from a collection you can simply set it to a new collection: VBA will delete the collection because we are no longer referencing it. When we remove all items we generally want to use the collection again so we are effectively killing two birds with one stone by using this
Adding Items to A Collection
It is simple to add items to a collection. You use the add property followed by the value you wish to add You can have any basic type in a collection such as a Double When you add items in this manner they are added to the next available index. In the fruit example, Apple is added to position 1 and Pear to position 2. excelmacromastery.com
Accessing Items of A Collection
To Access the items of a collection you simply use the index. As we saw the index is the position of the item in the collection based on the order they were added. The order can also be set using the Before or Afterparameter. You can also use the ItemProperty to access an item in the collection. It is the default method of the collection so the fol
Adding Different Types
You can also add different types of items to a collection. This is seldom needed. In VBA the Sheetscollections contains sheets of type Worksheet and of type Chart. (To create a Chart sheet simple right click on any Chart, select Move and select the radio button for New sheet). The following code displays the type and name of all the sheets in the c
Adding Items Using A Key
You can also add items using a key as the next example shows: I included the parameter names to make the above example clear. However you don’t need to do this. Just remember the key is the second parameter and must be a unique string. The following code shows a second example of using keys: Using keys is has three advantages: 1. If the order chang
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Introduction
Collections are a very important part of VBA. If you have used the language for any length of time then you will have used Collections. The most common ones are the Workbooks, Worksheets, Range and Cells collections. The following code shows some examples of using the VBA Workbookscollection: Collections are similar to arrays so it is important to ...
Collections Webinar
If you are a member of the website, click on the image below to view the webinar. (Note: Website members have access to the full webinar archive.)
Collections vs arrays?
We have looked at what collections and arrays have in common. So what is the difference and why use one over the other? The main difference is that with an array you normally set the size once. This means that you know the size before you start adding elements. Let me explain this with an example.
How to Create A Collection
You can declare and create in one line as the following code does As you can see you don’t need to specify the size. Once your collection has been created you can easily add items to it. You can also declare and then create the collection if and when you need it.
Removing All Items from A Collection
The Collection does not have a RemoveAllfunction. However to remove all items from a collection you can simply set it to a new collection: VBA will delete the collection because we are no longer referencing it. When we remove all items we generally want to use the collection again so we are effectively killing two birds with one stone by using this...
Adding Items to A Collection
It is simple to add items to a collection. You use the add property followed by the value you wish to add You can have any basic type in a collection such as a Double When you add items in this manner they are added to the next available index. In the fruit example, Apple is added to position 1 and Pear to position 2.
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