Tuesday, March 24, 2009

The entry ConnectionString has already been added.

put <clear/> before <add , like following:
 
<
connectionStrings>

<

clear />

<

add name="ConnectionString" connectionString="Data Source=SERVERNAME;Initial Catalog=DATABASE;User ID=USER" providerName="System.Data.SqlClient"/>

at

14 comments:

  1. UnknownJuly 20, 2009 at 8:19 AM

    thanks. that really helped. never saw this error before and was wondering how to fix it. thanks for your help.

    ReplyDelete
  2. Niraj PandeyOctober 8, 2010 at 10:05 PM

    thank's.....to help it' very useful.

    ReplyDelete
  3. Niraj PandeyNovember 19, 2010 at 12:39 AM

    again thank's........!!!!!

    ReplyDelete
  4. Niraj PandeyNovember 19, 2010 at 12:42 AM

    again thank's........!!!!!

    ReplyDelete
  5. sandeepJanuary 21, 2011 at 11:27 PM

    Thanks a lot...

    ReplyDelete
  6. Dilip NikamMarch 8, 2011 at 8:19 PM

    Thanks... My Problem is Resolved

    ReplyDelete
  7. HirenMarch 28, 2011 at 1:17 AM

    thanks you so much

    ReplyDelete
  8. Akhilesh YadavApril 21, 2011 at 2:07 AM

    its great solution,since one year i never saw this error and this is solved in first attempt .using your code

    ReplyDelete
  9. AnonymousMay 4, 2011 at 10:54 PM

    Thanks yar it works.
    Really big thanks!!!!1

    ReplyDelete
  10. The IT EnthusiastJune 6, 2011 at 6:21 AM

    U r xllent, u saved my time :)

    ReplyDelete
  11. kaisernayanNovember 29, 2011 at 11:02 PM

    OH! Thanks a lot. Really helps me a lot.

    ReplyDelete
  12. UnknownSeptember 13, 2012 at 10:57 PM

    thank you for the help!!

    ReplyDelete
  13. UnknownJuly 3, 2017 at 12:12 AM

    I had written before add but next time another connection string enters in text box same error exist. Could you help me pls

    ReplyDelete
  14. UnknownJuly 3, 2017 at 12:13 AM

    Its urgent


    ReplyDelete