How to identify whether data source is modified or not..?

[aremuga]

Thanks in advance..

[Alexander Valchev]

Hi Aremuga,

The dataSource does not expose a method for checking if there are unsaved changes or not.
Could you please provide more details about your scenario? In case you use a Grid control with batch editing you may check whether there are records with dirty property set to true.

Regards,
Alexander Valchev
the Telerik team

[Rayne]

Could you post a sample of how this would work?

In my application, I want to use external buttons to do the save/cancel changes and I'd like to alert the user and remind them to save their changes before navigating away from the page. I'd also like to enable/disable the save/cancel buttons depending on whether there are changes that need to be saved or not.

[Alexander Valchev]

Hi Rayne,

Basically you have to loop through the dataSource.data() array and check whether there is an item with a dirty property set to true or whether the item is new.

var data = dataSource.data();

for (idx = 0, idx < data.length; idx++) {
    if (data[idx].isNew() || data[idx].dirty) {
        return true;
    }
}

As a general information we plan to provide a build-in hasChanges method in the next release.

All the best,
Alexander Valchev
the Telerik team

[Achilles]

Hi Alexender,

Is the hasChanges method available already ?
If so can you provide a sample just like you had for the dataSource.data() looping mechanism

Thanks in Advance

Achilles

[Alexander Valchev]

Hi Achilles,

Yes, the hasChanges method is now available and is documented here:

• http://docs.kendoui.com/api/framework/datasource#methods-hasChanges

Regards,
Alexander Valchev
Telerik