Text wrap in Table cell - so value came in next row and not cut half way. use this code in expression to achieve result.
if (dataSetRow["cell_name"]== null) { '' }
else {
function wrap(longStr,width)
{
length = longStr.length;
if(length <= width)
return longStr;
return (longStr.substring(0, width) + "\n" + wrap(longStr.substring(width, length), width)); }
wrap( dataSetRow["cell_name"], 5 );
}