Maintaining pending changes when using ServerPaging

[Ryan]

Is there a way to maintain the pending changes on the grid when using ServerPaging, ServerGrouping, ServerFiltering, ServerSorting and ServerAggregates?  We're losing all pending changes whenever a filter is applied, page is changed, column sorted, etc.  Should these changes be preserved by default or is there something we can do to preserve them?  At a minimum, is there something we can do to detect these actions and prompt the user to commit the changes before filtering, paging, etc?

[Alexander Valchev]

Hello Ryan,

I am afraid that Kendo Grid does not provide a build-in functionality for maintaining the pending changes in case server side operations are turned on.

As a workaround, I suggest you to use the hasChanges method of the DataSource to detect whether there are any pending changes. You may hook up to the requestStart event which will fire every time when server operation is issued and warn the user if there are unsaved changes. Current operation can be cancelled via e.preventDefault()

requestStart: function (e) {
    if(this.hasChanges()) {
        e.preventDefault();
        //warn the user
    }
}

I hope this will help.

Kind regards,
Alexander Valchev
the Telerik team