Set selected value of dropdown on page load

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I have bind one dropdown using jquery and after changing it's value page is reloaded.
and that time i want to set the dropdown selected value with default value.

What I have tried:

C#

string language = "en";
                string lan = "English";
                if (StateHandler.GetHandler(StateHandler.StateType.Session).IsKeyExist(SessionKeys.Language))
                {
                    int LanguageId = Convert.ToInt32(StateHandler.GetHandler(StateHandler.StateType.Session).Get(SessionKeys.Language));
                    switch (LanguageId)
                    {
                        case 1:
                            language = "en";
                            lan = "English";
                            break;
                        case 2:
                            language = "hi";
                            lan = "Hindi";
                            break;
                        default:
                            break;
                    }
                    ddlLanguages.ClearSelection();

                    ddlLanguages.SelectedValue = LanguageId.ToString();

Posted 27-Apr-16 2:48am

aparnaChandras

Updated 10-May-16 1:36am

Santosh Kokatnur

v2

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Comments

Nigam,Ashish 27-Apr-16 8:55am

Where have you written this code(In which Event).

aparnaChandras 27-Apr-16 8:57am

on page load

aparnaChandras 27-Apr-16 9:00am

$(document).ready(function () {
prc_bind_Data();

});
prc_bind_Data = function () {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Default.aspx/BindDatatoDropdown",
data: "{}",
dataType: "json",
success: function (msg) {
if (msg != null) {
if (msg.d != null) {
// $("#ddlLanguages").append($("<option></option>").val(0).html("Select Language"));
var Dropdown = $('#<%=ddlLanguages.ClientID %>');
// Dropdown.append(new Option("SELECT Language", 0));
var obj = JSON.parse(msg.d);
$.each(obj, function (i, d) {

Dropdown.append(new Option(d.LanguageName, d.PkLanguageId));

// $("#ddlLanguages").append($("<option></option>").val(d.PkLanguageId).html(d.LanguageName));

});

}
}

},
error: function (result) {
alert("Error");
}
});
}
// $('#ddlLanguages').selected = true;

$(function () {

$("#ddlLanguages").change(function () {
alert($("#ddlLanguages").val());

ddlLanguageChange($("#ddlLanguages").val());

});
ddlLanguageChange = function (pLanguage) {
alert("Here");
postData = { pLanguage: pLanguage };
$.ajax({
async: false,
type: "POST",
url: "Default.aspx/ddlLanguageChange",
data: JSON.stringify({ "dbParameters": postData }),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
if (msg != null) {
if (msg.d != null) {

// $("#ddlLanguages").val() =

window.location.reload(true);

// $("#ddlLanguages option:contains(" + msg.d + ")").attr('selected', 'selected');
// var obj = JSON.parse(msg.d);
//
// $.each(obj, function (i, d) {
//
// });

// if(msg.d == "hi")
// {
// $("#ddlLanguages").val() = "Hindi";
// }
// else {
// $("#ddlLanguages").val() = "English";
// }

}
}
},
error: function (result) {
alert("Error");
}
});
}
});

this is jquery code written on .aspx

1 solution

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Thomas Nielsen - getCore · Answer 1 · 2016-04-29T02:54:00

Page reload means your server side stuff can execute again, so make a javascriptvariable and assign it and empty string. In that empty string use code brackets to assign the value of your protected page property.

Now your code behind can easily set it, and your jquery can easily access it and parse.

a bit lotech but does the trick.

Another way would be to use ajax instead of posting back but that's not the question.