Please try the above code snippet at your side and let me know if this helps you. If you still face the issue, please get back to us with the simplified issue reproducing sample to proceed further on this.
SRSridhar Syncfusion Team September 2, 2013 11:56 AM UTC
Please ignore the previous post.
Please make use of the below code snippet for calculating the formulas at run time, to remove the (") character with Essential XlsIO and let us know if this helps you.