Bind Dropdown with the help of check box!

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I have to bind checkbox list inside dropdownlist.
Suppose we are checking two checkbox inside dropdownlist
so on the behalf of checking we have to bind otherdropdown.

Example: Like in 1st dropdown we are checking US and UK country so we have to bind state dropdown on behalf of country dropdown but we might select more than one country at a time through checkbox.

Posted 12-Dec-13 22:39pm

rummer

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Gaurav Makwana 13-Dec-13 4:41am

just use combobox and bind value of combobox

rummer 13-Dec-13 4:59am

We have to take checkbox list inside dropdown so may select more than one

Gaurav Makwana 13-Dec-13 23:25pm

just see property of dropdown list see all property in msdn

2 solutions

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sankarsan parida · Answer 1 · 2013-12-12T22:43:00

Solution 1

See the following links
A Multiple Selection DropDownList (a CheckBoxList Inside a DropDownList)[^]
ASP.NET Multiple Selection DropDownList with AJAX HoverMenuExtender[^]

Posted 12-Dec-13 22:43pm

sankarsan parida

Comments

rummer 13-Dec-13 4:58am

No, This is different my requirement is binding two drop down

Jain Nishant · Answer 2 · 2013-12-16T00:39:00

With the help of Jquery and WebMethod you can achieve this:-

XML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>

    <script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>

    <script type="text/javascript" language="javascript">
        $(function() {
            var stuff = [];
            $('.multiselect input[type="checkbox"]').change(function() {
                if ($(this).is(':checked')) {
                    var element = $(this).val();
                    stuff.push(element);
                    // alert(stuff);
                }
                else {
                    var element = $(this).val();
                    //stuff.pop(element);
                    stuff = jQuery.grep(stuff, function(data) {
                        return data != element;
                    });
                    //   alert(stuff);
                }
                var sdata = {};
                sdata.stuff = stuff;
                $.ajax({
                    url: '../WebService/FirstService.asmx/CasCadeDDL',
                    type: 'POST',
                    cache: false,
                    dataType: 'json',
                    contentType: 'application/json; charset=utf-8',
                    data: JSON.stringify(sdata),
                    success: function(data) {
                        $('#ddlState').html(data.d);
                    }

                });
            });
        });
    </script>

    <style type="text/css">
        .multiselect
        {
            width: 7em;
            height: 5em;
            border: solid 1px #c0c0c0;
            overflow: auto;
        }
        .multiselect label
        {
            display: block;
        }
        .multiselect-on
        {
            color: #ffffff;
            background-color: #000099;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div class="multiselect">
        <label>
            <input type="checkbox" value="1" />US</label>
        <label>
            <input type="checkbox" value="2" />UK</label>
        <label>
            <input type="checkbox" value="3" />India</label>
        <label>
            <input type="checkbox" value="4" />Australia</label>
    </div>
    <br />
    <br />
    <select id="ddlState">
    </select>
    </form>
</body>
</html>

Now, the WebMethod code written in the webservice:-

C#

[WebMethod]
    public string CasCadeDDL(string[] stuff)
    {
        string conn = ConfigurationManager.ConnectionStrings["con_str"].ConnectionString;
        string _str = string.Empty;
        StringBuilder sb = new StringBuilder();
        using (SqlConnection con = new SqlConnection(conn))
        {
            SqlCommand cmd = con.CreateCommand();
            string _search = string.Join(", ", stuff);
            cmd.CommandText = "SELECT state FROM Country_State where CountryId in ("+_search+")";
            cmd.CommandType = CommandType.Text;
            con.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read())
            {
                sb.Append("<option>" + dr[0].ToString() + "</option>");
            }
            _str = sb.ToString();
        }
        return _str;
    }

Hope, this will helps you....Please ask for further queries...