如何使用context menu移动TreeList节点？

如果TreeList层级比较多，通过滚动一个control/page去找到目标节点，非常方便。

下面分享一下实现这个功能的源代码。

平台产品：DevExpress ASP.NET MVC

子控件：MVC TreeList

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$(function () {
    // Cache for dialogs
    var dialogs = {};

    var getValidationSummaryErrors = function ($form) {
        // We verify if we created it beforehand
        var errorSummary = $form.find('.validation-summary-errors, .validation-summary-valid');
        if (!errorSummary.length) {
            errorSummary = $('<div class="validation-summary-errors"><span>Please correct the errors and try again.</span><ul></ul></div>')
                .prependTo($form);
        }

        return errorSummary;
    };

    var displayErrors = function (form, errors) {
        var errorSummary = getValidationSummaryErrors(form)
            .removeClass('validation-summary-valid')
            .addClass('validation-summary-errors');

        var items = $.map(errors, function (error) {
            return '<li>' + error + '</li>';
        }).join('');

        var ul = errorSummary
            .find('ul')
            .empty()
            .append(items);
    };

    var resetForm = function ($form) {
        // We reset the form so we make sure unobtrusive errors get cleared out.
        $form[0].reset();

        getValidationSummaryErrors($form)
            .removeClass('validation-summary-errors')
            .addClass('validation-summary-valid')
    };

    var formSubmitHandler = function (e) {
        var $form = $(this);

        // We check if jQuery.validator exists on the form
        if (!$form.valid || $form.valid()) {
            $.post($form.attr('action'), $form.serializeArray())
                .done(function (json) {
                    json = json || {};

                    // In case of success, we redirect to the provided URL or the same page.
                    if (json.success) {
                        location = json.redirect || location.href;
                    } else if (json.errors) {
                        displayErrors($form, json.errors);
                    }
                })
                .error(function () {
                    displayErrors($form, ['An unknown error happened.']);
                });
        }

        // Prevent the normal behavior since we opened the dialog
        e.preventDefault();
    };

    var loadAndShowDialog = function (id, link, url) {
        var separator = url.indexOf('?') >= 0 ? '&' : '?';

        // Save an empty jQuery in our cache for now.
        dialogs[id] = $();

        // Load the dialog with the content=1 QueryString in order to get a PartialView
        $.get(url + separator + 'content=1')
            .done(function (content) {
                dialogs[id] = $('<div class="modal-popup">' + content + '</div>')
                    .hide() // Hide the dialog for now so we prevent flicker
                    .appendTo(document.body)
                    .filter('div') // Filter for the div tag only, script tags could surface
                    .dialog({ // Create the jQuery UI dialog
                        title: link.data('dialog-title'),
                        modal: true,
                        resizable: true,
                        draggable: true,
                        width: link.data('dialog-width') || 600,
                        beforeClose: function () { resetForm($(this).find('form')); }
                    })
                    .find('form') // Attach logic on forms
                        .submit(formSubmitHandler)
                    .end();
            });
    };

    // List of link ids to have an ajax dialog
    var links = ['#loginLink', '#registerLink'];

    $.each(links, function (i, id) {
        $(id).click(function (e) {
            var link = $(this),
                url = link.attr('href');

            if (!dialogs[id]) {
                loadAndShowDialog(id, link, url);
            } else {
                dialogs[id].dialog('open');
            }

            // Prevent the normal behavior since we use a dialog
            e.preventDefault();
        });
    });
});