asp.net building controls: How to detect a modified textbox in webservercontrols -- asp.net building controls

You're in the

asp.net building controls

group:

How to detect a modified textbox in webservercontrols

ton
1/28/2004 12:02:11 PM

asp.net building controls:

Hi,
I've developed a server control which shows a database record. The fields
are showen in 2 columns and the added controls depends on the datatype.
I use textboxes, chekcboxes and dropdownlists

Now I'm adding a server procedure, but how can I detect that one of the
fields has been modified.
Is there another way than just comparing these fields with the original
value in the database.

Ton

Re: How to detect a modified textbox in webservercontrols

ton
1/28/2004 1:22:59 PM

for those who do not understand what I meant the procedure is to SAVE the
data

Now I'm adding a SAVE procedure

"ton" <vrs@home.nl> schreef in bericht
news:bv85e1$41c$1@news3.tilbu1.nb.home.nl...
[quoted text, click to view]

Re: How to detect a modified textbox in webservercontrols

Alessandro Zifiglio
1/29/2004 7:03:57 PM

hi ton, when processing postback data you can compare the old fields with
the new fields and if changed fire an event. This can be done by having your
control implement the IPostBackDataHandler interface.
For a control to be able to examine form data that is posted back by the
client, it must implement the System.Web.UI.IPostBackDataHandler interface.
The contract of this interface allows a control to determine whether its
state should be altered as a result of the postback and to raise appropriate
events.
More with sample code here :
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconpostbackdataprocessingsample.asp

[quoted text, click to view]

Got something to say? Click here to post a reply to this thread.

Don't see what you're looking for? Try a search.

View other messages in the asp.net building controls group.

View Other Months
June 2003
July 2003
August 2003
September 2003
October 2003
November 2003
December 2003
January 2004
February 2004
March 2004
April 2004
May 2004
June 2004
July 2004
August 2004
September 2004
October 2004
November 2004
December 2004
January 2005
February 2005
March 2005
April 2005
May 2005
June 2005
July 2005
August 2005
September 2005
October 2005
November 2005
December 2005
January 2006
February 2006
March 2006
April 2006
May 2006
June 2006
July 2006
August 2006
September 2006
October 2006
November 2006
December 2006
January 2007
February 2007
March 2007
April 2007
May 2007
June 2007
July 2007
August 2007
September 2007
October 2007
November 2007
December 2007
January 2008
February 2008
March 2008
April 2008
May 2008
June 2008

home · blog · groups

Questions? Comments? Contact the dn