Use edit method to mark/unmark all records

In continuation to my previous post (Edit method - I), I'll now use edit methods to mark all and unmark all the records of a form. It is a very common requirement to have such ability on forms.
In this post we'll use the edit method created in previous post (Edit method - I) and continue to create new buttons on customer details form to mark all and unmark all records.

To achieve this,we'll be doing the following:
1. Create new buttons on customer details form to mark all and unmark all records.
2. Create new functions on customer details form to mark all and unmark all records.

Let's start:

1. Create 2 new buttons on the customer table form, and change their text property to "Mark All" and "Unmark All" respectively. The CustTable form design should look as shown below:

2. Now we create a new function on this form to mark all the records. Let's name this function as PAMarkAll. We traversed through all the records one by one using a while loop and called the edit method for each record to mark it. The code should look like:

In the above code, we have declared a variable of type custTable which will help us to traverse through all the records shown on the form.
Next we initialize it with the first record using
          custTable_ds.getFirst() function.
Then we start the while loop.
Please note the way we have called the edit method. The first parameter of the edit method signifies that the value is changed, the second parameter is the custTable variable which we are using to iterate the records on the form, the third parameter is to signify that value returned  from the edit method needs to be turned on.
After marking the currently selected record we will get the next record using
        custTable_ds.getNext() method.
The above loop will be executed till the next record is found.
At last we used element.redraw() method to redraw the form.

3. In the similar way we create a new function to unmark all the records, the only change is that we need to pass false as the third parameter in the edit method call. The function to unmark all the records should look as below:

4. The functions that we created above should be called when we click the mark all and unmark all buttons. To do this we override the clicked method of both the buttons. The clicked methods should look like:

Now that we are done with the modifications required to mark all/unmark all the records, let's open the customer master form and then play with mark all and unmark all buttons. On clicking mark all button we'll notice that all the records are marked.

On clicking Unmark all button we notice that all the records are unmarked.

So in the post we saw a good example where we can use edit methods in real time situations. In my coming posts, I'll show how we can use combination of edit and display method to achieve some good features to enhance user experience on Dynamics Ax forms.