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ASP.NET Button OnClientClick Confirm Dialog

Posted on 2014-03-14
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Last Modified: 2014-03-19
Hello friends,

I'm looking at this example from W3Schools:  

http://www.w3schools.com/aspnet/showaspx.asp?filename=demo_prop_webcontrol_button_onclientclick

The problem I see here is that the server-side function is invoked whether or not the client-side function returned true.  It's not really doing a real Cancel.  How do I modify this so that the server-side function is only invoked IF the client-side function returns true.  If the client-side function returns false, then the server-side function should not be invoked.

Thanks so much for your assistance.

Jazon
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Question by:piratepatrol
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5 Comments
 
LVL 19

Assisted Solution

by:Manoj Patil
Manoj Patil earned 250 total points
ID: 39932454
Hi,
I have did it in GridView for Delete Confirmation. Check it out.

You can do this by following way..
First you need to add below code in your aspx page

<script type="text/javascript">
        function ConfirmationBox(username) {

            var result = confirm('Are you sure you want to delete ' + username + ' Details?');
            if (result) {

                return true;
            }
            else {
                return false;
            }
        }
    </script>

Open in new window


Next just add following code in your page load..
btnDelete.Attributes.Add("onclick", "javascript:return ConfirmationBox('" + username + "')");

Open in new window

0
 
LVL 3

Author Comment

by:piratepatrol
ID: 39932645
Hi techChallenger1.. Can you kindly show me the <asp:Button /> line in your aspx code?  Thanks so much.
0
 
LVL 19

Expert Comment

by:Manoj Patil
ID: 39932982
Hey you don't need to call anything on Button control except Button_Click
Check below attached files which I have created for you. AND ITS WORKING EASILY
Design Page
About.aspx
Code Behind Page
About.aspx.cs
Designer Code File
About.aspx.designer.cs
0
 
LVL 28

Accepted Solution

by:
Ark earned 250 total points
ID: 39933627
Just add 'return' to the code. From your link:
was:
asp:Button OnClick="btClick1" OnClientClick="btClick2()"
Text="Click Me" runat="server" />
should be
asp:Button OnClick="btClick1" OnClientClick="return btClick2()"
Text="Click Me" runat="server" />

or even simply
OnClientClick="return confirm('Are you sure?');"
0
 
LVL 3

Author Closing Comment

by:piratepatrol
ID: 39940710
Thanks, guys.
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