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The OnMoveUp client-side event handler is called when the user increases the value of an enumeration or numeric range mask part by typing in a new value or using the arrow keys or mouse wheel.

Two parameters are passed to the event handler:

  • sender is the input control.

  • eventArgs has the following methods:

    • set_cancel() lets you prevent the value from increasing.

    • get_newValue() returns the new value assigned to the mask part if the change is allowed.

    • get_oldValue() returns the current value assigned to the mask part, before the change.

    • get_currentPart() returns the client-side object of the mask part whose value the user is trying to change.

The following example uses the OnMoveUp event display an alert when the user increases the value of a numeric range :

<telerik:RadMaskedTextBox RenderMode="Lightweight" ID="RadMaskedTextBox1" runat="server" 
    Mask="<0..255>.<0..255>.<0..255>.<0..255>" PromptChar="_" Label="IP Address">
    <ClientEvents OnMoveUp="MoveUp" />
<script type="text/javascript">
    function MoveUp(source, eventArgs)
        alert("Changing from " + eventArgs.get_oldValue() + " to "
        + eventArgs.get_NewValue() + " at position " + eventArgs.get_currentPart().offset);

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