How to determine column type in Excel file using C#

I have created a C# program to read an Excel file and insert records into SQL. Every now and then it fails and it fails because one of the columns is not defined the same as in all the other files. This particular column contains a 14 digit string of digits. Most times it is defined in Excel as number but every now and then it is defined as text. Is there a way using C# to determine the type of a column or cell so I can adjust the code to convert one way or the other?
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Ares KurkluSoftware EngineerCommented:
I don't think it is possible to determine the type of a column, I am not sure how you are reading the values but initially if you read every field as string then you should be able do some checks on that string variable to find the type. Basically you may have to validate cell basis.

there are many ways to do that, you can use functions like:
long.TryParse , int.TryParse etc.

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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
check the source file, is that possible that column's values had been converted to text (like something with +e bla bla..) before you're importing it to your database?
rwheeler23Author Commented:
They are supposedly using the same template over and over again. I noticed this when I was ding the import manually using SSMS.
rwheeler23Author Commented:
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