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how to change visibility of imagebutton at some answers

In my project I have used imagebutton for an attachment to the answers. But the problem is coming that when the expert has not any attached file then that imagebutton i.e. attachment symbol should not be seen at the run time.Please note that I have used Eval for fetching attachments from database.Please help me in code when the user does not makes any attachment to the answer. in short how to make the visibility of imagebutton false in the answers where there is no attachment made..
Answers (1)
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Manas Mohapatra

Manas Mohapatra

NA 29.3k 3.3m 9y
Please provide your relevant code, what it doing when user enters a value in column2 and press enter..
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Chinna Netha

Chinna Netha

NA 261 68.3k 9y
this is windows application c#
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Rajeesh Menoth

Rajeesh Menoth

NA 24.7k 629.6k 9y
Hi,
 
Check this reference :
 
https://msdn.microsoft.com/en-us/library/ms366709.aspx