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How to SQL query a tab-delimited text file (ASP.NET 2.0 / C#)?

Posted on 2007-11-19
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Last Modified: 2013-11-07
Is there any library or easy way to query a tab-delimited text file from C#? My tab-delimited text file has headers as the first row and was hoping I can use those field names to query the file somehow. Anything like this exists?
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Question by:bemara57
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Bob Learned earned 250 total points
ID: 20312403
You can use ODBC with the Text Driver to read from text files.  You will need a schema.ini to dictate the file structure.

Reference:

Connect to Text Files with the Microsoft Jet ODBC Text Driver
http://users.drew.edu/skass/sql/TextDriver.htm

Bob
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by:graye
graye earned 250 total points
ID: 20312832
I presume you're talking about performing an SQL-style query (such as "Select * from Table1 Where Name='Smith'")?   If so, you'd be suprized at what ADO.Net can do without a back-end database.

First of all, you'll need to import the CSV file into a DataTable... TheLearnedOne's posting will do precisely that.
Next, you'll need to figure out what kind of SQL queries you need to do.   For example, if you're just trying to do "filter" with a WHERE clause (as in the example above), then  you can use the DataTable's own Select() method.   Using DataColumnExpressions, you can do a bit more...
But, if you need to do complex SQL select statements (and actually use the SQL language), you'll either have to wait until C# 3.0 to come out or use a 3rd-party "SQL Engine" add on.

Take a look at the following articles (Yeah, they're in VB.Net, but you'll get the point)
http://home.hot.rr.com/graye/Articles/ADO_Expressions.htm
http://home.hot.rr.com/graye/Articles/DataTableJoins.htm
http://home.hot.rr.com/graye/Articles/SQL_Engine.htm
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