The base element of the grid is a row. So, one of the most common tasks is iteration through grid setting|getting row specific data. There are two ways to iterate rows in the grid:

• Iterating rows
  • Classic iterator;
  • Built-in iterator;
• Iterating cells
  • Classic cell iterator;
  • Built-in cell iterator.

In should be noted that there is no fundamental difference between two cell iteration approaches.

This way of iteration has the following characteristics:

• Used parameter - row index (not ID), zero based position of a row in the grid;
• The order of iteration equals the order of elements in the grid;
• In case of paging mode - only current page is iterated;
• In case of tree grid - only currently visible rows are iterated;
• In case of applied filtering - only rows that accept filtering rules will be included in iteration;
• In case of smart rendering mode - not usable.

    <script>
        for (var i=0; i<grid.getRowsNum(); i++){
                  // here i - index of the row in the grid
             do_something_with_row(index);
        }
    </script>
 

This way of iteration has the following characteristics:

• Used parameter - row ID;
• Order of iteration is not equal to the current rows order in the grid (basically, it is equal to the adding order of rows to the grid, but it can be inconsistent);
• In case of paging or smart rendering mode - all rows parsed at the current moment will be affected;
• In case of applied filtering - all rows in the grid (including filtered out ones) will be included in iteration.

    <script>
        grid.forEachRow(function(id){ // function that gets id of the row as an incoming argument
                // here id - id of the row
             do_something_with_row(id);
        })
    </script>
 

Classic cell iterator is the following:

    <script>
        for (var i=0; i<grid.getColumnCount(); i++){
                // i - index of the column
            alert(grid.cells(id,i).getValue());
        }
    </script>
 

Built-in cell iterator has the following structure:

    <script>
        grid.forEachCell(id,function(c){
            alert(c.getValue());
        });
    </script>
 

Method forEachCell() takes the following parameters:

• rowId - id of the row where the cell must be iterated;
• custom_code - function that gets eXcell object as an incoming argument.

You can loop from all child-rows of some row in treegrid as

grid._h2.forEachChild(parent_id,function(element){
//element.id - id of child row
//element.parent.id - parent id
do_something_with_row(element.id);
});

where parent_id - id of rows, against which functionality will be executed.

You can loop through all rows in some group by

 
mygrid.forEachRowInGroup(name,function(id){
do_something_with_row(id);
});

where name - key-value of group