How to get text from a textbox using javascript

Question

i have developed a web application using mvc4.

in this case i need to get a text box value(actually the text entered in the text box) using javascript.

here is the code i am using

    @model PortalModels.WholeSaleModelUser
    @using (Html.BeginForm("uploadFile", "WholeSaleTrade", FormMethod.Post, new { enctype = "multipart/form-data" }))
    {
        @Html.ValidationSummary(true)

    <fieldset>
        <legend>WholeSaleModelUser</legend>
        <table>
            <tr>
                <td>
                    <div class="editor-label">
                        @Html.LabelFor(model => model.Name)
                    </div>
                </td>
                <td>
                    <div class="editor-field">
                        @Html.TextBoxFor(model => model.Name)
                        @Html.ValidationMessageFor(model => model.Name)
                    </div>
                </td>
            </tr>
</table>
        <div id="partial">
            <table>
                <tr>
                    <td>
                        <img id="blah" src="../../Images/no_image.jpg" alt="your image" height="200px" width="170px" />
                    </td>
                </tr>
</table>

    <script type="text/javascript">
        function loadUserImage() {
            var userImg = document.getElementById("blah");
            var imgNm = $("#Name").value;
            userImg.src = "D:/FEISPortal/FortalApplication/Img/" + imgNm + ".png";
            alert(imgNm);
            alert(userImg.src);
        }
    </script>

in that case alert gives the value as "undefined" and if do the following modification alert gives nothing.

var imgNm = document.getElementById("Name").value;

for

var imgNm = $("#Name").value;

how to get the text entered in the text box?

First, give specific id like, @Html.TextBox("Name", Model.Name, new { id = "UserName" }). Second get value using jquery like, $('#UserName').val()... — sathish
– sathish, Commented Jun 27, 2013 at 6:50
i can already have the value but how to handle the onchange event for any elements in PARTIAL VIEW.. that is the main problem i have.. — sanzy
– sanzy, Commented Jun 27, 2013 at 8:56

Ufuk Hacıoğulları · Accepted Answer · 2013-06-27 06:46:04Z

5

You should use val() function for that:

var imgNm = $("#Name").val();

answered Jun 27, 2013 at 6:46

Ufuk Hacıoğulları

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4 Comments

sanzy Over a year ago

but the case how to get the value after page loads or textbox textchange even fires?? really need a answer..

sanzy Over a year ago

yeah i think so.. but sir i'm using this script in my partial view page so how can i handle the change event using id or name of the name text box of my partial view? please help

sanzy Over a year ago

i can already have the value but how to handle the onchange event for any elements in PARTIAL VIEW.. that is the main problem i have..

Ufuk Hacıoğulları Over a year ago

@sanzy You can select all inputs inside the form and bind an event handler.

Anton · Accepted Answer · 2013-06-27 07:59:30Z

2

If you're using native javascript you should use this:

var userImgNameElement = document.getElementById("userImgNameId");
var userImgNameValue = userImgNameElement.getAttribute("value");

With "onChanged" event:

addEvent(document.getElementById('userImgNameId'), 'change', function(event) {
    var userImgNameValue = event.target.getAttribute("value");
});

edited Jun 27, 2013 at 7:59

answered Jun 27, 2013 at 7:13

Anton

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2 Comments

sanzy Over a year ago

yeah i think so.. but sir i'm using this script in my partial view page so how can i handle the change event using id or name of the name text box of my partial view? please help and refer the code my partial view

sanzy Over a year ago

i can already have the value but how to handle the onchange event for any elements in PARTIAL VIEW.. that is the main problem i have..

Sumurai8 · Accepted Answer · 2013-06-27 07:04:07Z

1

In an input element, the value of can be found in a value property of that element. It can therefore be retrieved via document.getElementById('idOfElement').value.

In an textarea element has it's value between the starting and the closing tag. Therefore, the value property is empty. In raw javascript, you would be able to retrieve the contents with document.getElementById('idOfElement').innerText.

If you are however using jQuery, Ufuk's solution with .val() is much easier to use.

answered Jun 27, 2013 at 7:04

Sumurai8

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3 Comments

sanzy Over a year ago

yeah i think so.. but sir i'm using this script in my partial view page so how can i handle the change event using id or name of the name text box of my partial view? please help and refer the code my partial view

sanzy Over a year ago

i can already have the value but how to handle the onchange event for any elements in PARTIAL VIEW.. that is the main problem i have..

Sumurai8 Over a year ago

I have no idea what you mean with 'partial view'. You can find more information about the method .on() you need to use in the documentation. As far as I am aware you didn't mention anything about event handlers or 'onchange' handlers in your question, so I would suggest making a new question where you explain very clearly what the exact problem is if you've read the documentation and googled some more, and still can't figure out what you need to do.

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