bootstrap-fileinput 简单使用

bootstrap-fileinput 是一款图片/文件上传 bootstrap 插件，简单示例代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <link href="/lib/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="/lib/bootstrap-fileinput/css/fileinput.min.css" media="all" rel="stylesheet" type="text/css" />
    <script src="/lib/jquery/dist/jquery.min.js"></script>
    <script src="/lib/bootstrap-fileinput/js/plugins/canvas-to-blob.min.js" type="text/javascript"></script>
    <script src="/lib/bootstrap-fileinput/js/fileinput.min.js"></script>
    <script src="/lib/bootstrap/dist/js/bootstrap.min.js" type="text/javascript"></script>
    <script src="/lib/bootstrap-fileinput/js/fileinput_locale_zh.js"></script>
</head>
<body>
    <input id="fileinput" name="fileinput" type="file" multiple accept="image/*" class="file-loading">
    <script>
        $("#fileinput").fileinput({
            language: 'zh',
            uploadUrl: "/ajax/upload",
            uploadAsync: true,
            allowedFileExtensions: ['jpg', 'gif', 'png', 'jpeg']
        });

        //上传成功后执行
        $("#fileinput").on("fileuploaded", function (event, data, previewId, index) {
            console.log(data.response.msg);
        });
    </script>
</body>
</html>

后端代码：

public class AjaxController : Controller
{
    public IActionResult Upload()
    {
        var file = HttpContext.Request.Form.Files[0];
        return Json(new { success = true, msg = "image url after upload" });
    }
}

演示效果：

头像上传示例代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <link href="/lib/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="/lib/bootstrap-fileinput/css/fileinput.min.css" media="all" rel="stylesheet" type="text/css" />
    <script src="/lib/jquery/dist/jquery.min.js"></script>
    <script src="/lib/bootstrap-fileinput/js/plugins/canvas-to-blob.min.js" type="text/javascript"></script>
    <script src="/lib/bootstrap-fileinput/js/fileinput.min.js"></script>
    <script src="/lib/bootstrap/dist/js/bootstrap.min.js" type="text/javascript"></script>
    <script src="/lib/bootstrap-fileinput/js/fileinput_locale_zh.js"></script>
</head>
<body>
    <style>
        .kv-avatar .file-preview-frame, .kv-avatar .file-preview-frame:hover {
            margin: 0;
            padding: 0;
            border: none;
            box-shadow: none;
            text-align: center;
        }

        .kv-avatar .file-input {
            display: table-cell;
            max-width: 220px;
        }
    </style>

    <!-- the avatar markup -->
    <div id="kv-avatar-errors-1" class="center-block" style="width:800px;display:none"></div>
    <form class="text-center" action="/ajax/upload" method="post" enctype="multipart/form-data">
        <div class="kv-avatar center-block" style="width:200px">
            <input id="fileinput" name="fileinput" type="file" class="file-loading">
        </div>
    </form>
    <script>
        $("#fileinput").fileinput({
            language: 'zh',
            overwriteInitial: true,
            maxFileSize: 1500,
            showClose: false,
            showCaption: false,
            browseLabel: '',
            removeLabel: '',
            browseIcon: '<i class="glyphicon glyphicon-folder-open"></i>',
            removeIcon: '<i class="glyphicon glyphicon-remove"></i>',
            removeTitle: 'Cancel or reset changes',
            elErrorContainer: '#kv-avatar-errors-1',
            msgErrorClass: 'alert alert-block alert-danger',
            defaultPreviewContent: '<img src="/images/default_avatar_male.jpg" alt="Your Avatar" style="width:160px">',
            layoutTemplates: { main2: '{preview} {upload} {browse}' },
            allowedFileExtensions: ["jpg", "png", "gif"]
        });

        //上传成功后执行
        $("#fileinput").on("fileuploaded", function (event, data, previewId, index) {
            console.log(data.response.msg);
        });
    </script>
</body>
</html>

演示效果：

参考资料：

• https://github.com/kartik-v/bootstrap-fileinput
• http://plugins.krajee.com/file-input/demo#image-dimensions
• JS组件系列——Bootstrap文件上传组件：bootstrap fileinput