[ACCEPTED]-Why in ASP.NET is a button click event executes when page is refreshed?-asp.net

Accepted answer
Score: 21

If I understand correctly.

You have a web 11 form with a button.

You push the button which 10 causes a post back and the event handler 9 for the button press to execute.

Then you 8 hit refresh and the page has the button 7 event handler execute again.

The reason for 6 this is your refreshing the last information 5 sent to the server. Which is the button 4 click information in the __doPostback. This 3 is why you are seeing the event of the button 2 fire again.

Here is an article talking about how 1 to detect a refresh over a postback.

Score: 4

It's because clicking that button sends 5 a POST request to your page. The POST data 4 is kept in the http headers and when you 3 refresh, it's sent again to server.

Your 2 browser should warn you when you try to 1 refresh the page.

Score: 4

This is by design. When you click a server 7 side button (with the runat="server" attribute), a click 6 will cause a postback and the button click 5 event will fire.

If you want some client 4 side behaviour, you need to use the OnClientClick attribute, as 3 described in this MSDN article (How to: Respond 2 to Button Web Server Control Events in Client 1 Script).

Score: 3

If this is really important for someone, then 3 they can refresh the page again through 2 a Response.Redirect(). This is the easiest 1 solution that I have been able to find.

Score: 3

the easiest way to solve this issue is to 2 redirect your page to some url or refresh 1 your current page using Response.Redirect(Request.RawUrl);

Score: 1

I had the same issue and it was solved by 2 putting the button as asp:AsyncPostBackTrigger 1 of the updatePanel.

Score: 1

If you want to refresh Part of your page 2 then put the control inside the UpdatePanel if the 1 control causes PostBack

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <asp:Button CssClass="btn btn-default" 
          onClick="uploadAttachmentToList" runat="server" 
          ID="btnUpload" ClientIDMode="Static" Text="Upload" 

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