updateItem | RadListView for ASP.NET AJAX Documentation
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updateItem

Method which fires the Update command for the RadListView edited item corresponding to the index passed as an argument in edit mode.

function updateItem(index)
index Integer The edited item corresponding to the index will be updated.
<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
    <script type="text/javascript">
        function UpdateFirstItem() {
            var listView = $find("<%= RadListView1.ClientID %>");
            listView.updateItem(0);
        } 
    </script>
</telerik:RadCodeBlock>
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