vb.net - How to customize InnerException.Message for System.Data.UpdateException in ASP.NET -

first of taking time read through post. have question may newbie piece of cake some.

i adding data database table using entity framework. when adding duplicate primary key exception in innerexception.message reads "violation of primary key constraint 'pk_studentid'. cannot insert duplicate key in object 'dbo.students'. statement has been terminated. "

however, want rephrase error message end user, save exact message table name , column name logs later. essentially, want rephrase error message "you cannot have duplicate entry student identification number. please enter new value."

how can this?

i have tried inherit system.data.updateexception , put if check see innerexception.message reads, , change accordingly. did not work.

thanks,

i think want.

        try             'your code         catch ex exception             'store ex.message want              throw new exception("your custom message here.")         end try 

example:

private sub uifunction()     dim errormessage string     try          'a call bll function/sub cause exception     catch ex exception         errormessage = ex.message() 'ex.message() = "your custom message."     end try end sub  public sub bllfunction()     try         'run code cause exception     catch ex exception         throw new exception("your custom message.")     end try end sub