# Accessing Client Changes at the Server

Client-side changes are available on the server-side after postback. You can use the `ClientChanges` property of the **RadDropDownList** to access them. The `ClientChanges` property returns a collection of objects of type `ClientOperation`. An operation has two properties:

* **Item** - the item which has been affected by the client operation;

* **Type** - the type of the operation which is one of the following four cases:

  * **Update** - when a property is set on the client through methods such as `set_text()`, `set_value()`, `enable()`, `disable()`, etc.: `dropdownlistItem.disable();`

  * **Remove** - when the `remove` client method is called: `dropdownlist.get_items().remove(dropdownlistItem);`

  * **Insert** - when the `add` client method is called: `dropdownlist.get_items().add(dropdownlistItem);`

  * **Clear** - when the `clear` method is called: `dropdownlist.get_items().clear();`

> note Note that you need to call the `trackChanges()` and `commitChanges()` client methods of **RadDropDownList** in order to be able to access the changes on the server via the `ClientChanges` property.

## Example:

The code snippet below enumerates through all operations in the ClientChanges collection and utilizes both the `Item` and `Type` properties.

```C#
	     	
foreach (ClientOperation<DropDownListItem> operation in RadDropDownList1.ClientChanges)
{
    DropDownListItem item = operation.Item;
    switch (operation.Type)
    {
        case ClientOperationType.Insert:
            break;
        case ClientOperationType.Remove:
            break;
        case ClientOperationType.Update:
            UpdateClientOperation<DropDownListItem> update = operation as UpdateClientOperation<DropDownListItem>;
            break;
        case ClientOperationType.Clear:
            break;
    }
} 
				
```

```VB
For Each operation As ClientOperation(Of DropDownListItem) In RadDropDownList1.ClientChanges
Dim item As DropDownListItem = operation.Item
 Select Case operation.Type
  Case ClientOperationType.Insert
   Exit Select
  Case ClientOperationType.Remove
   Exit Select
  Case ClientOperationType.Update
Dim update As UpdateClientOperation(Of DropDownListItem) = TryCast(operation, UpdateClientOperation(Of DropDownListItem))
   Exit Select
  Case ClientOperationType.Clear
   Exit Select
 End Select
Next 
				
```

## See Also

* [RadDropDownList client-side Object](https://www.telerik.com/products/aspnet-ajax/documentation/controls/dropdownlist/client-side-programming/objects/raddropdownlist-object)