How to show a button control dynamically only if fileupload control is browsed?

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Can any one help me out to find out a solution:
I have a fileupload control with a 'preview' btn. I want to show this 'preview' btn only after the fileupload control is used with its browse btn.
Thank you.

Posted 11-Dec-12 23:18pm

S.Rajendran from Coimbatore

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kk2014 12-Dec-12 5:26am

u mean to say if file is uploaded then you want to show preview button...

2 solutions

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choudhary.sumit · Accepted Answer · 2012-12-11T23:25:00

Solution 1

you can use

C#

if (FileUpload1.HasFile)

property of the fileupload control, if it returns true, make your 'preview' button visible.
FileUpload.HasFile Property[^]

Posted 11-Dec-12 23:25pm

choudhary.sumit

kk2014 · Accepted Answer · 2012-12-11T23:47:00

Solution 2

for that u have to take another button which upload file and on post back u can check it.

if (FileUpload1.HasFile)
 {
    btnPreivew.Visible = true;
 }
 else
 {
    btnPreivew.Visible = false;
 }

Posted 11-Dec-12 23:47pm

kk2014