c# 后台拼接分页Html

  public static string ReplaceStr(string originalStr, string oldStr, string newStr)
        {
            if (string.IsNullOrEmpty(oldStr))
            {
                return "";
            }
            return originalStr.Replace(oldStr, newStr);
        }

  public static string OutPageList(int pageSize, int pageIndex, int totalCount, string linkUrl, int centSize)
        {
            //计算页数
            if (totalCount < 1 || pageSize < 1)
            {
                return "";
            }
            int pageCount = totalCount / pageSize;
            if (pageCount < 1)
            {
                return "";
            }
            if (totalCount % pageSize > 0)
            {
                pageCount += 1;
            }
            if (pageCount <= 1)
            {
                return "";
            }
            StringBuilder pageStr = new StringBuilder();
            string pageId = "__id__";
            string firstBtn = "<a href="" + ReplaceStr(linkUrl, pageId, (pageIndex - 1).ToString()) + "">«上一页</a>";
            string lastBtn = "<a href="" + ReplaceStr(linkUrl, pageId, (pageIndex + 1).ToString()) + "">下一页»</a>";
            string firstStr = "<a href="" + ReplaceStr(linkUrl, pageId, "1") + "">1</a>";
            string lastStr = "<a href="" + ReplaceStr(linkUrl, pageId, pageCount.ToString()) + "">" + pageCount.ToString() + "</a>";

            if (pageIndex <= 1)
            {
                firstBtn = "<span class="disabled">«上一页</span>";
            }
            if (pageIndex >= pageCount)
            {
                lastBtn = "<span class="disabled">下一页»</span>";
            }
            if (pageIndex == 1)
            {
                firstStr = "<span class="current">1</span>";
            }
            if (pageIndex == pageCount)
            {
                lastStr = "<span class="current">" + pageCount.ToString() + "</span>";
            }
            int firstNum = pageIndex - (centSize / 2); //中间开始的页码
            if (pageIndex < centSize)
                firstNum = 2;
            int lastNum = pageIndex + centSize - ((centSize / 2) + 1); //中间结束的页码
            if (lastNum >= pageCount)
                lastNum = pageCount - 1;
            pageStr.Append("<span>共" + totalCount + "记录</span>");
            pageStr.Append(firstBtn + firstStr);
            if (pageIndex >= centSize)
            {
                pageStr.Append("<span>...</span>
");
            }
            for (int i = firstNum; i <= lastNum; i++)
            {
                if (i == pageIndex)
                {
                    pageStr.Append("<span class="current">" + i + "</span>");
                }
                else
                {
                    pageStr.Append("<a href="" + ReplaceStr(linkUrl, pageId, i.ToString()) + "">" + i + "</a>");
                }
            }
            if (pageCount - pageIndex > centSize - ((centSize / 2)))
            {
                pageStr.Append("<span>...</span>");
            }
            pageStr.Append(lastStr + lastBtn);
            return pageStr.ToString();
        }