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SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);

This line error in Object reference not set to an instance of an object.. retrieve the error

i am first time leaning in asp .net. So given to me list of website address for tutorial reference of asp.NET

Posted 26-Dec-15 17:33pm

Member 12230050

Updated 26-Dec-15 17:46pm

Dave Kreskowiak

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Dave Kreskowiak · Answer 1 · 2015-12-26T17:47:00

Solution 1

The ConfigurationManager apparently couldn't find a connection string in your web.config file that was named "con".

Come on. This is VERY EASY to figure out if you only learned the basics of how to use the debugger.

Posted 26-Dec-15 17:47pm

Dave Kreskowiak