How To Loop Rows (other Than Current Row) In Subgrid Using JS In Dynamics 365

I am able to read a Subgrid cell value triggered by OnChange using web resource.

Following which, I would need to loop through the remaining rows (except current row) in the subgrid and read each cell value for each row.

May I know how can it be done?

Current code snippet:

function SetNA(context) {

    debugger;

    //id of the subgrid
    var id = formContext.data.entity.getId();

    // get the attribute which fired the onchange.
    var changedFirstNameAttr = context.getEventSource();

    // get the container for the attribute.
    var attrParent = changedFirstNameAttr.getParent();

    // var FirstName Field Attribute
    var changedFirstNameField = attrParent.attributes.get("firstName");

    // get the value of the changed first name value
    var changedFirstNameValue = changedFirstNameAttr.getValue();

    alert(changedFirstNameValue);

    if (changedFirstNameValue != null)
    {
        //loop through other rows in the subgrid, and read each cell value
    }
}

You should be able to use getRows method to pull and iterate through all the editable grid rows and achieve what you want.

var gridRows = gridContext.getGrid().getRows();

//loop through each row to get values of each column
gridRows.forEach(function (row, i) {
    var gridColumns = row.getData().getEntity().getAttributes();
    //loop through each column in row
    gridColumns.forEach(function (column, j) {
        var atrName = column.getName();
        var atrValue = column.getValue();
        });
    });

Read more