Preview Image Before Uploading to Server Using jQuery

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Here we are going to learn Preview Image Before Uploading to Server Using jQuery with example


In this article, we are going to learn how to Preview Image Before Uploading to Server Using jQuery asp.net with example.  

so lets start the coding for Preview Image Before Uploading to Server Using jQuery asp.net with example

Step 1: Create a new website in Visual Studio 2010

Step 2: Add a new asp.net webpage(fileName: Default4.aspx) with the following codes.In below codes we have added some control to achieve the target i.e. Preview Image Before Uploading to Server Using jQuery asp.net with example

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" %>


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Preview Image Before Uploading using jQuery</title>
    <style type="text/css">
        img#imgPreview
        {
            filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image);
        }
    </style>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js">
    </script>
    <script type="text/javascript">
        $(document).ready(function () {
            $('#fuImage').on('change', function () {
                $("img#imgPreview").attr('src', ''); //First remove the image src if already selected
                //To check if uploaded file is image only..
                var fileExtension = ['jpeg', 'jpg', 'png', 'gif', 'bmp'];
                if ($.inArray($(this).val().split('.').pop().toLowerCase(), fileExtension) == -1) {
                    alert("Only image files are allowed!");
                    return false;
                }

                //To check if browser version IE <= 9, apply image filter type to support <= IE9..
                if ($.browser.msie && parseFloat(jQuery.browser.version) <= 9.0) {
                    var img = $('img#imgPreview')[0];
                    img.filters.item('DXImageTransform.Microsoft.AlphaImageLoader').src = $(this).val();
                    img.filters.item('DXImageTransform.Microsoft.AlphaImageLoader').sizingMethod = 'scale';
                } else {
                    //To check 'FileReader' is supported by browser or not..
                    if (typeof (FileReader) != 'undefined') {
                        var frImage = new FileReader();
                        frImage.onload = function (e) {
                            $("img#imgPreview").attr('src', e.target.result);
                        }
                        frImage.readAsDataURL($(this)[0].files[0]);
                    } else {
                        alert("Your browser does not support FileReader!");
                    }
                }
            });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div style="width: 300px;">
        <strong>Select Image: </strong>
        <input type="file" id="fuImage" />
        <br />
        <img id="imgPreview" alt="Preview Image" src="" width="300" height="250" />
    </div>
    </form>
</body>
</html>

so, In this tutorial we have learned how to Preview Image Before Uploading to Server Using jQuery asp.net with example. 

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