CODEWITHSUNDEEP
c#jqueryasp.net.netajax
Eliza
Eliza

Reputation: 135

Getting value from a dropdown list that was populated with AJAX

I had populated an ASP.net dropdown list with AJAX now I need to get the Id to store in into the database in a C# method, (I'm using LINQ)

This is my webmethod

[WebMethod]
public static ArrayList GetLanguageList()
{
    ArrayList lstArrLanguage = new ArrayList();
     IQueryable<Common.Town> myList = new SupplierBL().GetTowns();
     foreach(Common.Town t in myList)
    {
        string name = t.Name;
        string id = t.TownId.ToString();
        lstArrLanguage.Add(new ListItem(name, id));
    }

    return lstArrLanguage;
}

My test.aspx code

<script language="javascript" type="text/javascript">
    $(document).ready(function () {
        $.ajax({
            type: "POST",
            url: "test.aspx/GetLanguageList",
            data: '',
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (msg) {
                $("#ddlLanguage").empty().append($("<option></option>").val("[-]").html("Please select"));
                $.each(msg.d, function () {
                     $('#<%=ddlLanguage.ClientID%>').append($("<option></option>").val(this['Value']).html(this['Text']));
                });
            },
            error: function () {
                alert("An error has occurred during processing your request.");
            }
        });
    });
</script>

Upvotes: 4

Views: 9021

Answers (2)

Muhammad Hani
Muhammad Hani

Reputation: 8664

You can't get selected value from DropDownList if you adding options in javaScript. You can try the following

string selectedValue = Request.Form[ddlLanguage.UniqueID];

This question may be useful also.

Upvotes: 8

Kundan Singh Chouhan
Kundan Singh Chouhan

Reputation: 14302

If you populate the value of dropdown via ajax than it can't be available on Server Side because the page doesn't postback during ajax request.

In order to get the value of dropdown in C# use below snippets :

String _value = Convert.ToString(Request[ddlLanguage.ClientID]);

Hope this will help !!

Upvotes: 0

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