How to prevent multiselect from deleting items?

[Internal Licensing]

I use the functionality of the multiselect to add or remove items, but I need a confirmation before an item will be deleted.

So I use the DataBound-Event to save the current values an everytime the Change-Event is triggered I compare the current values against the previous:

 function onChange() {
        var previous = this._savedValues;
        var current = this.value();
        if (current.length < previous.length) {
            var diff = $(previous).not(current).get(0);
            if (diff != null) {
                var memberName = diff.substring(diff.indexOf('CN=') + 3, diff.indexOf(','));
                var string = 'Delete' +  memberName + '?';
                if (confirm(string.replace('{0}', memberName))) {
                    console.log("confirmed"); // nothing more happens here
                }
                else {
                    //reset;
                    this.value(previous);
                }
            }
        }
        saveCurrent(this);
    } 

    function saveCurrent(multi) {
        multi._savedValues = multi.value().slice(0);
    } 

    function onDataBound() {
        saveCurrent(this);
    }​

The problem is: This doesn't really work properly. If I add and remove some items, the multiselect deletes more items than I want to remove. 

 

[Kiril Nikolov]

Hello Oliver,

 

I am afraid that currently such functionality is not supported as the change event is not preventable. You can submit this as a feature request on UserVoice, so that it is considered for implementation in a future release.

 

Regards,
Kiril Nikolov
Telerik

 

 

[Internal Licensing]

It is possible to Add or Insert an item programmatically?

I store the deleted item from dataItems but I cannot Add or Insert the item. 

[Kiril Nikolov]

Hi Oliver,

You can use the corresponding dataSource methods for that:

http://docs.telerik.com/kendo-ui/api/javascript/data/datasource#methods

Regards,
Kiril Nikolov
Telerik

 

 

[Mike]

QUOTE>I am afraid that currently such functionality is not supported as the change event is not preventable. You can submit this as a feature request on UserVoice, so that it is considered for implementation in a future release.

 

Has this functionality been added yet?

[Kiril Nikolov]

Hi,

The functionality is not yet added, as the UserVoice item was not up voted enough to be prioritized over other suggestions. Please feel free to up vote that suggestion.

Regards,
Kiril Nikolov
Telerik by Progress