MVC4 5分页控件，支持Ajax AjaxOption支持

MVC4 5分页控件，支持Ajax AjaxOption支持


/// <summary>
    /// MVC4 5分页控件，支持Ajax AjaxOption支持 beta 1.0
    /// 用法
    /// @Ajax.Pages
    /// @Html.Pages
    /// </summary>
    public static class PagesExtension
    {
        public static MvcHtmlString Pages(this HtmlHelper htmlHelper, int rowCount, int pageSize, string url, string option = "")
        {
            if (rowCount <= pageSize)
            {
                return new MvcHtmlString("");
            }
            string str = string.IsNullOrEmpty(url) ? HttpContext.Current.Request.Url.AbsolutePath : url;
            string str2 = HttpContext.Current.Request.Url.Query.Trim(new char[] { ‘?‘ });
            StringBuilder builder = new StringBuilder();
            string[] strArray = str2.Split(new char[] { ‘&‘ });
            foreach (string str3 in strArray)
            {
                if ((str3.Length > 0) && !str3.StartsWith("page="))
                {
                    string[] strArray2 = str3.Split(new char[] { ‘=‘ });
                    if (strArray2.Length == 2)
                    {
                        builder.AppendFormat("&{0}={1}", strArray2[0], HttpContext.Current.Server.UrlEncode(strArray2[1]));
                    }
                }
            }

            string htmlString = GetPaginationHtml(rowCount, pageSize, str, builder.ToString() + option);

            return new MvcHtmlString(htmlString);
        }

        public static MvcHtmlString Pages(this AjaxHelper ajaxHelper, int rowCount, int pageSize, string formAction, AjaxOptions ajaxOptions, string option = "")
        {
            if (rowCount <= pageSize)
            {
                return new MvcHtmlString("");
            }

            //组装表单
            TagBuilder tagBuilder = new TagBuilder("form");
            tagBuilder.MergeAttributes<string, object>(HtmlHelper.AnonymousObjectToHtmlAttributes(null));
            tagBuilder.MergeAttribute("action", formAction);
            tagBuilder.MergeAttribute("method", "post");
            ajaxOptions = GetAjaxOptions(ajaxOptions);
            if (ajaxHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
            {
                tagBuilder.MergeAttributes<string, object>(ajaxOptions.ToUnobtrusiveHtmlAttributes());
            }

            //表背单内容
            StringBuilder inputTagBuilder = new StringBuilder();
            StringBuilder urlBuilder = new StringBuilder();

            string str = string.IsNullOrEmpty(formAction) ? HttpContext.Current.Request.Url.AbsolutePath : formAction;
            string str2 = HttpContext.Current.Request.Url.Query.Trim(new char[] { ‘?‘ });
            List<string> strArray = str2.Split(new char[] { ‘&‘ }).Where(a => !string.IsNullOrEmpty(a)).ToList();

            string[] formKeys = HttpContext.Current.Request.Form.AllKeys;
            foreach(var v in formKeys)
            {
                if (v != "X-Requested-With")
                {
                    strArray.Add(v + "=" + HttpContext.Current.Request.Form[v]);
                }
            }
            if(!strArray.Any(a=>a.StartsWith("page")))
            {
                strArray.Add("page=1");
            }

            foreach (string str3 in strArray)
            {
                string[] strArray2 = str3.Split(new char[] { ‘=‘ });
                inputTagBuilder.AppendFormat("<input type=‘hidden‘ value=‘{1}‘ name=‘{0}‘ />", strArray2[0], HttpContext.Current.Server.UrlEncode(strArray2[1]));
                if ((str3.Length > 0) && !str3.StartsWith("page="))
                {
                    if (strArray2.Length == 2)
                    {
                        urlBuilder.AppendFormat("&{0}={1}", strArray2[0], HttpContext.Current.Server.UrlEncode(strArray2[1]));
                    }
                }
            }

            string pageHtmlString = GetPaginationHtml(rowCount, pageSize, str, urlBuilder.ToString() + option);
            string outputHtmlString = tagBuilder.ToString().Replace("</form>", inputTagBuilder + pageHtmlString + "</form>");

            return new MvcHtmlString(outputHtmlString);
        }
        private static AjaxOptions GetAjaxOptions(AjaxOptions ajaxOptions)
        {
            if (ajaxOptions == null)
            {
                return new AjaxOptions();
            }
            return ajaxOptions;
        }

        private static string GetPaginationHtml(int rowCount, int pageSize, string url, string option)
        {
            int num = (int)Math.Ceiling((double)((rowCount * 1.0) / ((double)pageSize)));
            if (num < 2)
            {
                return string.Empty;
            }
            if (url == "")
            {
                url = HttpContext.Current.Request.Url.AbsolutePath;
            }
            int result = 1;
            if (HttpContext.Current.Request["page"] != null)
            {
                int.TryParse(HttpContext.Current.Request["page"], out result);
            }
            StringBuilder builder = new StringBuilder();
            builder.AppendFormat("<div class=\"pagination-nav\"><div class=\"pull-left\" style=‘margin-left: 5px;‘>共 {1} 页，{0} 条记录</div><ul class=\"pagination pull-right\">", rowCount.ToString(), num.ToString());
            int num3 = 0;
            if (result > 1)
            {
                builder.Append(string.Concat(new object[] { " <li><a href=\"", url, "?page=", result - 1, option, "\"", " data-page=\"" + (result - 1) + "\"", ">\x00ab</a></li> " }));
            }
            if (num > (result + 5))
            {
                num3 = result + 5;
            }
            else
            {
                num3 = num;
            }
            for (int i = result - 6; i < num3; i++)
            {
                if (i >= 0)
                {
                    if (result == (i + 1))
                    {
                        builder.Append("<li class=\"active\"><a href=\"javascript:\">" + ((i + 1)).ToString() + "<span class=\"sr-only\">(current)</span></a></li>");
                    }
                    else
                    {
                        builder.Append(string.Concat(new object[] { "<li><a href=\"", url, "?page=", i + 1, option, "\"", " data-page=\"" + (i + 1) + "\"", ">" + (i + 1), "</a></li>" }));
                    }
                }
            }
            if (result != num)
            {
                builder.Append(string.Concat(new object[] { "<li><a href=\"", url, "?page=", result + 1, option, "\"", " data-page=\"" + (result + 1) + "\"", ">\x00bb</a></li>" }));
            }
            builder.Append("</ul></div><div class=\"clearfix\"></div>");
            return builder.ToString();
        }

    }

var ajaxPage = function () {
    return {
        init: function () {

            $("form .pagination-nav a[data-page]").live(‘click‘, function () {

                $("input[name=page]", $(this).parents(‘form‘)).val($(this).attr(‘data-page‘));

                $(this).parents(‘form‘).submit();

                return false;
            });
        },
        //!init
    }
}();

//run init
$(function () { ajaxPage.init(); });

ajax:
@Ajax.Pages(Model.TotalCount, Model.PageSize, @Url.Action("list"), new AjaxOptions { UpdateTargetId = "updateTargetID" })

html:

@Html.Pages(Model.TotalCount, Model.PageSize, @Url.Action("list"), new AjaxOptions { UpdateTargetId = "updateTargetID" })