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The client-side Filter event is raised when the user filters the files in the grid of RadFileExplorer.

To handle this event, simply write a JavaScript function that can be called when the event occurs. Then assign the name of this function as the value of the OnClientFilter property of the control.

The client-side OnClientFilter event handler receives two arguments:

  1. Sender: The RadFileExplorer object that fired the event.

  2. Event arguments: An event arguments object of type Telerik.Web.UI.RadFileExplorerFilterEventArgs that exposes the following methods:

    Table 1: OnClientFilter Event Arguments Object

    Name Parameters Return Type Description
    get_cancel() Boolean Returns a value that indicates whether the event is cancelled.
    get_domEvent() Object Returns а reference to the DOM event that triggered the filtering.
    get_text() String Returns the filtering text.
    set_cancel(value) Boolean Sets whether the event will be cancelled (if true is passed).
    set_text(value) Sets the filtering text.

Example 1: Handle the RadFileExplorer's client-side Filter event.

<telerik:RadFileExplorer ID="RadFileExplorer1" runat="server"  OnClientFilter="onClientFilter" EnableFilterTextBox="true">
    <Configuration ViewPaths="~/Images" DeletePaths="~/Images" UploadPaths="~/Images" />
    function onClientFilter(fileExplorer, args) {
        var filterText = args.get_text();
        if (filterText.length <= 3) {
            //cancel the event if the filter text contains less than three chars

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