如何在Telerik ASP.NET MVC网格上清除过滤器

我有一个允许用户过滤的网格。如果用户更改了用于填充网格的搜索词,则来自上一次搜索的过滤器将保持不变。

<label for="UserName"> 
    User Name:</label> 
<%= Html.TextBox("UserName", "") %> 
&nbsp; &nbsp; 
<input id="btnSearch" type="submit" value="Submit" /> 
</p> 
<div class="<%= "t-" + Html.GetCurrentTheme() %>" style="width: 400px;"> 
<%= Html.Telerik().Grid<ADGroup>()       
        .Name("Groups") 
        .Columns(columns=> 
        { 
            columns.Add(c => c.GroupName).Width(350); 
        }) 
        .Sortable() 
        .Filterable() 
        .Pageable(paging => 
            paging.PageSize(20) 
        ) 
        .Ajax(ajax => ajax.Action("_GetGroups", "GroupSearch", new { userName = "John Doh" })) 
        .BindTo((IEnumerable<ADGroup>)ViewData["Groups"]) 
%> 
</div> 

当按下BTN搜索时,我触发了网格的重新绑定。

<% 
Html.Telerik().ScriptRegistrar() 
    .OnDocumentReady(() =>  
    { 
    %> 
    var groupsGrid = $('#Groups').data('tGrid'); 
    $('#btnSearch') 
        .live("click", function() { 
            var user = $('#UserName').val(); 
            // rebind the related grid 
            groupsGrid.rebind({ 
                userName: user 
            }); 
        }); 
    <%  
}); 

%&燃气轮机;

$('.t-grid-filter:first') 
     .trigger('click');