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=http://www.mamicode.com/‘{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=http://www.mamicode.com/"", 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=http://www.mamicode.com/"javascript:\">" + ((i + 1)).ToString() + "<span class=\"sr-only\">(current)</span></a></li>");                    }                    else                    {                        builder.Append(string.Concat(new object[] { "<li><a href=http://www.mamicode.com/"", 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=http://www.mamicode.com/"", 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" })