I have been researching this issue and have come up with a workaround in the case where a developer is using response.write to debug code in an Update Panel. Instead of using Response.Write (which doesn't work) I added a textbox (or a label) in the Update
Panel. Then I set the text property of the textbox or label in the method that is processed when the trigger is executed.
Debugging results are displayed on the page. Works Great.
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Use response.write within AJAX Update Panel
May 14, 2012 01:45 PM|DeepPowder|LINK
I have been researching this issue and have come up with a workaround in the case where a developer is using response.write to debug code in an Update Panel. Instead of using Response.Write (which doesn't work) I added a textbox (or a label) in the Update Panel. Then I set the text property of the textbox or label in the method that is processed when the trigger is executed.
Debugging results are displayed on the page. Works Great.