how to IMPORT EXCEL FILE IN SQL TABALE USING C#

SQL Import Data from Excel[^]
How to import MS Excel data to SQL Server table using c#.net[^]
Import Excel File into SQL server 2005 in ASP.NET using c# ??[^]
How to import excel file to grid view in asp.net using c# AND save grid view to database sql server 2005[^]
Import Data to SQL Server from Excel or Access using TSQL Script[^]
Reading Excel file in SQL Server[^]

You have several possibilities:
1) using just the sql server facilities: http://support.microsoft.com/kb/321686[^]
2) Using data access on client side: Import Data from excel to SQL server using C# in ASP. NET[^].
Some remarks on this:
- it is not only for asp.net
- don't use string concatenation for dml statement generation, use parameterized command[^] instead or EntityFramework
3) Bulk copy: http://technico.qnownow.com/bulk-copy-data-from-excel-to-destination-db-using-sql-bulk-copy/[^]
4) Interop: http://dontbreakthebuild.com/2011/01/30/excel-and-c-interop-with-net-4-how-to-read-data-from-excel/[^], Faster MS Excel Reading using Office Interop Assemblies[^]