DropDown


Selection


Enable/Disable






You can perform many tasks such as toggle, show, hide, select, unselect, etc on the client-side using the client-side API. To get the client-side instance (object) of the dropdownlist, get its jQuery selector using its client-side ID and call the getDropDownListInstance() method. The method will return the dropdownlist client-side instance which you can later use to call many client-side API methods. Please, refer to the View tab on this example for code details.
@using Trirand.Web.Mvc

<!DOCTYPE html>
<html lang="en-us">
<head>
    <meta charset="utf-8">
    <title>jqDropDownList for ASP.NET MVC - Client-Side API</title>    
    <!-- The jQuery UI theme that will be used by jqDropDownList -->
    <script src="~/Scripts/jquery-3.0.0.min.js" type="text/javascript"></script>
    <!-- The jqTreeView client-side javascript -->
    <script src="~/Scripts/trirand/jquery.jqDropDownList.min.js" type="text/javascript"></script>
    <!-- The jqTemplating javascript -->
    <script src="~/Scripts/trirand/jquery.jqTemplating.min.js" type="text/javascript"></script>
    <!-- The jQuery UI theme that will be used by the grid. -->
    <link rel="stylesheet" type="text/css" href="http://code.jquery.com/ui/1.11.4/themes/redmond/jquery-ui.css" />
    <!-- The jQuery UI theme extension jqTreeView needs -->
    <link rel="stylesheet" type="text/css" href="~/Content/themes/ui.jqDropDownList.css" />
</head>
<body>    
    <table>
        <tr>
            <td valign="top">
                @(Html.Trirand().JQDropDownList(
                new JQDropDownList
                {
                    Height = 200,
                    Width = 150,
                    Items = new List<JQListItem>
                    {
                        new JQListItem { 
                            Text = "One", 
                            Value = "One",
                            ImageUrl = "/content/images/folder.png"
                        },
                        new JQListItem 
                        { 
                            Text = "Two", 
                            Value = "TheValueOfTwo",
                            ImageUrl = "/content/images/folder-open.png"
                        },
                        new JQListItem 
                        { 
                            Text = "Three", 
                            Value = "Three",
                            ImageUrl = "/content/images/document.png"
                        }
                    }
                }, "dropdownlist"))            
            </td>
            <td valign="top">
                 <fieldset title="DropDown">
                    <legend style="font-size:120%; font-family: Tahoma">DropDown</legend>
                    <input type="button" value="Show DropDown" onclick="showDropDown()" />
                    <input type="button" value="Hide DropDown" onclick="hideDropDown()" />
                    <input type="button" value="Toggle DropDown" onclick="toggleDropDown()" />
                </fieldset>
                <br /><br />
                <fieldset title="Selection">                
                    <legend style="font-size:120%; font-family: Tahoma">Selection</legend>
                    <input type="button" value="Find by text nad select 'One'" onclick="selectOne()" />
                    <input type="button" value="Find by value nad select 'Two'" onclick="selectTwo()" />
                    <input type="button" value="Find by index nad select 'Three'" onclick="selectThree()" />
                </fieldset>
                <br /><br />
                <fieldset title="Enabled/Disable">
                    <legend style="font-size:120%; font-family: Tahoma">Enable/Disable</legend>
                    <input type="button" value="Enable DropDown" onclick="enableDropDown()" />
                    <input type="button" value="Disable DropDown" onclick="disableDropDown()" />                    
                    <br />
                    <input type="button" value="Enable 'Two'" onclick="enableTwo()" />
                    <input type="button" value="Disable 'Two'" onclick="disableTwo()" />
                </fieldset>                
            </td>
        </tr>
    </table>
    
    <script type="text/javascript">
    
    function showDropDown() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        dropDown.showDropDown();        
    };
    
    function hideDropDown() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        dropDown.hideDropDown();        
    };
    
    function toggleDropDown() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        dropDown.toggleDropDown();        
    };
    
    function selectOne() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        var item = dropDown.getItemByText("One");
        dropDown.select(item);
    };
    
    function selectTwo() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        var item = dropDown.getItemByValue("TheValueOfTwo");
        dropDown.select(item);
    };
    
    function selectThree() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        var item = dropDown.getItemByIndex(2); // index is zero based, first item has index = 0
        dropDown.select(item);
    };
    
    function enableDropDown() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        dropDown.enable();
    };
    
    function disableDropDown() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        dropDown.disable();
    };
    
    function enableTwo() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        var item = dropDown.getItemByText("Two");
        if (item)
            dropDown.enableItem(item);
    };
    
    function disableTwo() {
        var dropDown = $("#dropdownlist").getDropDownListInstance();
        var item = dropDown.getItemByText("Two");        
        if (item)
            dropDown.disableItem(item);        
    };
    
    </script>
            
    <br /><br /><br />
    <br /><br /><br />
    <div>
          
    </div>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MVCDemo.Controllers.DropDownList
{
    public partial class DropDownListController : Controller
    {
        public ActionResult ClientAPI()
        {
            return View();
        }
    }
}
Switch theme:


Theming is based on the very popular jQuery ThemeRoller standard. This is the same theming mechanism used by jQuery UI and is now a de-facto standard for jQuery based components. The benefits of using ThemeRoller are huge. We can offer a big set of ready to use themes created by professional designers, including Windows-like themes (Redmond), Apple-like theme (Cupertino), etc. In addition to that any jQuery UI controls on the same page will pick the same theme.

Last, but not least, you can always roll your own ThemeRoller theme, using the superb Theme Editor

To use a theme, simply reference 2 Css files in your Html <head> section - the ThemeRoller theme you wish to use, and the jqGrid own ThemeRoller Css file. For example (Redmond theme):

<link rel="stylesheet" type="text/css" media="screen" href="/themes/redmond/jquery-ui-1.8.2.custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />