Thanks for your posting and considering Aspose.Cells.
Please first find your desired value or data inside the worksheet using the approach mentioned in this article.
( http://www.aspose.com/docs/display/cellsnet/Find+or+Search+Data )
Once, you have found the value or cell containing your value, then you get the row number and apply style format to entire row as mentioned in this article.
( http://www.aspose.com/docs/display/cellsnet/Formatting+Rows+and+Columns )