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C#

public Class1()
   {
     con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString);
   }

plz explain this code
how to use this code.

Posted 26-Jan-12 7:06am

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fjdiewornncalwe 26-Jan-12 13:13pm

Looks like an exam or interview question, so I'm going to have to defer answering on this one.

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OriginalGriff · Answer 1 · 2012-01-26T08:10:00

Break it down:

C#

public Class1()
   {
   }

Declares a constructor for a class created by an amateur - anyone with more than 2 grammes of experience would have given it a name which reflects what it actually does rather than leave the VS default name.

C#

con = ...

Assigns a value to a variable, called "con" which from context is a class level variable, from the name it should be a private field.

C#

... = new SqlConnection();

Says that the variable being assigned to is of the class SQLConnection (because SqlConnection is a sealed class, so "con" cannot have been derived from it, and it is unlikely that you would use anything lower in the inheritance chain to store an SqlConnection)

C#

...ConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString...

Gets the connection string for a database from the application default configuration.

Easy isn't it?

Next time, try that yourself, and if you don't understand a part of it, google!