mvc HtmlHelper 分頁類 static的記得

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HtmlHelper的擴充：注意點：擴充方法必須是靜態方法，所在的類必須是靜態類，所在的命名空間改成System.Web.MVC則能省略頁面中必須添加命名空間的約束。//主要就是輸出分頁的超級連結的標籤//自訂分頁Helper擴充public static HtmlString ShowPageNavigate(this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount)        {            var redirectTo = htmlHelper.ViewContext.RequestContext.HttpContext.Request.Url.AbsolutePath;            pageSize = pageSize == 0 ? 3 : pageSize;            var totalPages = Math.Max((totalCount + pageSize - 1) / pageSize, 1); //總頁數            var output = new StringBuilder();            if (totalPages > 1)            {                //if (currentPage != 1)                {//處理首頁串連                    output.AppendFormat("<a class=‘pageLink‘ href=‘{0}?pageIndex=1&pageSize={1}‘>首頁</a> ", redirectTo, pageSize);                }                if (currentPage > 1)                {//處理上一頁的串連                    output.AppendFormat("<a class=‘pageLink‘ href=‘{0}?pageIndex={1}&pageSize={2}‘>上一頁</a> ", redirectTo, currentPage - 1, pageSize);                }                else                {                   // output.Append("<span class=‘pageLink‘>上一頁</span>");                }                output.Append(" ");                int currint = 5;                for (int i = 0; i <= 10; i++)                {//一共最多顯示10個頁碼，前面5個，後面5個                    if ((currentPage + i - currint) >= 1 && (currentPage + i - currint) <= totalPages)                    {                        if (currint == i)                        {//當前頁處理                            //output.Append(string.Format("[{0}]", currentPage));                            output.AppendFormat("<a class=‘cpb‘ href=‘{0}?pageIndex={1}&pageSize={2}‘>{3}</a> ", redirectTo, currentPage , pageSize, currentPage );                        }                        else                        {//一般頁處理                            output.AppendFormat("<a class=‘pageLink‘ href=‘{0}?pageIndex={1}&pageSize={2}‘>{3}</a> ", redirectTo, currentPage + i - currint, pageSize, currentPage + i - currint);                        }                    }                    output.Append(" ");                }                if (currentPage < totalPages)                {//處理下一頁的連結                    output.AppendFormat("<a class=‘pageLink‘ href=‘{0}?pageIndex={1}&pageSize={2}‘>下一頁</a> ", redirectTo, currentPage + 1, pageSize);                }                else                {                    //output.Append("<span class=‘pageLink‘>下一頁</span>");                }                output.Append(" ");                if (currentPage != totalPages)                {                    output.AppendFormat("<a class=‘pageLink‘ href=‘{0}?pageIndex={1}&pageSize={2}‘>末頁</a> ", redirectTo, totalPages, pageSize);                }                output.Append(" ");            }            output.AppendFormat("第{0}頁 / 共{1}頁", currentPage, totalPages);//這個統計加不加都行            return new HtmlString(output.ToString());        }