Prompt user to save data

[thuhue]

Is there a working sample of how to prompt user to save data before leaving an ASP.NET web page? Particularly apply to autopostback controls and composite usercontrols. Thanks.

[sremiger]

How I did it was using Javascript and every field called a function CheckDirty which set a dirty flag when changed and when it went to post back the event in the body BeforeUnload I check the flag and ask a question about saving.

[Romel Evans]

You can always use the following from the codebehind:

for example if you have a delete button and you want to confirm the delete:

this.deleteButton.Attributes.Add("onclick","return confirm('Are You Sure You Want to Delete?');");


If the user presses No, then in your client side jscript you just return with a false, otherwise you return true, causing a postback event which processes the delete function.

Hope that helps.

Romel Evans