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Is it possible to warn the user, when the disable items in the DropDownList are selected

Platform: jQuery |
Control: ejDropDownList |
Published Date: August 9, 2016 |
Last Revised Date: May 10, 2019

Description:

We can able to show the “warning” message, when the disabled items in the DropDownList is hovered. This can be achieved by adding the additional span tag to the “li” elements of the DropDownList in the client side event called “create”.

Solution:

  1. Render the DropDownList as follows

 

 

JavaScript

<div class="control">

    <div class="ctrllabel">Select your skill</div>

    <input type="text" id="skillsets" />

    <button id="btn">Disable</button>

</div>

 

<script type="text/javascript">

    var target;

    $(function () {

        var skillset = [

            { skill: "ASP.NET" }, { skill: "ActionScript" }, { skill: "Basic" },

            { skill: "C++" }, { skill: "C#" }, { skill: "dBase" }, { skill: "Delphi" },

            { skill: "ESPOL" }, { skill: "F#" }, { skill: "FoxPro" }, { skill: "Java" },

            { skill: "J#" }, { skill: "Lisp" }, { skill: "Logo" }, { skill: "PHP" }

        ];

        $('#skillsets').ejDropDownList({

            dataSource: skillset,

            fields: { text: "skill" },

            showCheckbox: true,

            enableFilterSearch: true,

            create : "myFunc"

        });

        $("#btn").ejButton({

            showRoundedCorner: true,

            size: "mini",

        click : "onClick"

        });

        target = $('#skillsets').data("ejDropDownList");

    });

</script>

 

DropDownList with disabled

  1. Upon clicking to the Disable button, certain element in the DropDownList will be disabled.

 

JavaScript

function onClick(args){

        target.disableItemsByIndices("1,3,5,7");

      }

 

DropDownList with filter

 

  1. In the “create” event of DropDownList, we have appended the span element to the all items (li element) in the DropDownList.

 

JavaScript

function myFunc(args){

        this._getLi().append($("<span class='e-msg e-icon'> </span>"));

      }

 

  1. When hover to the disable items in the popup wrapper, the warning icon will be shown.

 

 

DropDownList with popup

  1. In this example, we have used “font icon” for the warning message. Apply the following CSS

 

 

CSS

<style type="text/css" class="cssStyles">

    .control {

        margin-left: 20px;

    }

 

    #btn {

        margin-left: 200px;

    }

 

    .ctrllabel {

        padding-top: 15px;

    }

 

    .e-ddl-popup div > ul li.e-disable:hover > span.e-msg:before {

        float: right;

        margin-top: 5px;

        content: "\e64c";

        color: red;

    }

</style>

 

 

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