How to Import data from excel to sql

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ASP.NET

Hello,

I am importing data from excel to sql.
I am using the following connection string:-

excelconnectionstring = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR={1}'";

And in excel one coloum-data is in following form:-
WB/7225/X-123433

The problem is,when iam getting the data from excel to datatable,all data are coming in the datatable except the above form..please, tell me how can i correct the issue..