CODEWITHSUNDEEP
c#javascriptjquery.netasp.net
DotNetInfo
DotNetInfo

Reputation: 3404

jquery val() on textbox doesn't set DOM value attribute

I am facing a weird issue and not sure whether it's jquery or combination of my scenario that is causing this. When I set the textbox value using jquery, the textbox displays correct value but the value attribute inside the html is still the one that it was loaded with. Why is it displaying different text then the one in the DOM?

I am having a dynamically generated form which adds two number and displays the addition into third textbox using jquery as shown below. You can reproduce using below code

The designer file

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

<script src="../Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script type="text/javascript">
    $(document).ready(function () {

        $(".addToTotal").blur(function () {
            UpdateTotal();
        });
    });

    function UpdateTotal() {

        var add = 0;
        $(".addToTotal").each(function () {
            add += Number($(this).val());
        });
        $(".txtTotalPoints").val(add.toFixed(2));
        $("#para").text("Sum of all textboxes is : " + add);
    }

</script>
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
<input id="addAll" type="button" value="Sum all Textboxes" /><br />
<p id="para"> </p>
<br />
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

Code behind file that dynamically adds control is

        protected void Page_Init(object sender, EventArgs e)
    {
        TextBox txt1 = new TextBox();
        txt1.ID = "txt1";
        txt1.CssClass = "addToTotal";

        TextBox txt2 = new TextBox();
        txt2.ID = "txt2";
        txt2.CssClass = "addToTotal";

        TextBox txt3 = new TextBox();
        txt3.ID = "txt3";
        txt3.CssClass = "txtTotalPoints";

        PlaceHolder1.Controls.Add(txt1);
        PlaceHolder1.Controls.Add(txt2);
        PlaceHolder1.Controls.Add(txt3);
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            UpdateTextBoxTextProperty(this);
        }
    }

    private void UpdateTextBoxTextProperty(Control parent)
    {
        foreach (Control c in parent.Controls)
        {
            if (c is TextBox)
            {
                string Id = c.ID;
                string fieldName = Id.Substring(3);
                (c as TextBox).Text = fieldName;
            }

            if (c.Controls.Count > 0)
            {
                UpdateTextBoxTextProperty(c);
            }
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {

    }

Upvotes: 3

Views: 2805

Answers (2)

Bilal Murtaza
Bilal Murtaza

Reputation: 795

you can also user

$(selector).attr("value","Hello World.");

Upvotes: 2

Nathan
Nathan

Reputation: 6216

that's what should happen: the dom is dynamic, but when you view the page source, the browser will show the original html. (of course, this depends on which browser you're using, each browser is different)

Upvotes: 1

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