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How to disable checkbox in the grid

Please tell me how to disable checkboxes in a grid's checkbox column. Or can the grid set the enable-disable status of the column?

Thank you very much.

You can use the following code:

function disableCol(){
        var rowNum=mygrid.getRowsNum();
        col=4;
        for (var i=0; i<rowNum; i++)
            mygrid.cellByIndex(i,col).setDisabled(true)
        }

col- index of a column which you would like to disable.