一个简单的ASP.MVC分页控件

分页功能实现方面参考了网上的一些内容，加上自己的一些修改，使用方式如 下：

(鉴于分页代码基本上和别人的没什么两样，所以这里就省略了。)

封装扩展方法

public static string Pager(this HtmlHelper html, IPageData model, bool alwaysShow,bool showNumber)        {            string text = "<!--没有任何数据,所以不显示分页控件-->";            bool show = model.TotalCount > 0 && alwaysShow || model.TotalCount > model.PageSize;            if (show)            {                StringBuilder sb = new StringBuilder();                var reqUrl = html.ViewContext.RequestContext.HttpContext.Request.Url.ToString();                string link = "";                if (reqUrl.IndexOf("page") >= 0)                {                    Regex re = new Regex(@"page=(\d+)", RegexOptions.IgnoreCase);                    link = re.Replace(reqUrl, "page=%7Bpage%7D");                }                else if (reqUrl.IndexOf("?") < 0)                {                    link = reqUrl + "?page=%7Bpage%7D";                }                else                {                    link = reqUrl + "&page=%7Bpage%7D";                }                #region 生成四个按钮                TagBuilder root = new TagBuilder("div");                root.AddCssClass("ZuiePager");                                TagBuilder fBtn = new TagBuilder("a");                fBtn.AddCssClass("btn");                fBtn.MergeAttribute("style", "font-family:Webdings;");                fBtn.InnerHtml = "9";                TagBuilder pBtn = new TagBuilder("a");                pBtn.AddCssClass("btn");                pBtn.MergeAttribute("style", "font-family:Webdings;");                pBtn.InnerHtml = "3";                TagBuilder nBtn = new TagBuilder("a");                nBtn.AddCssClass("btn");                nBtn.MergeAttribute("style", "font-family:Webdings;");                nBtn.InnerHtml = "4";                TagBuilder lBtn = new TagBuilder("a");                lBtn.AddCssClass("btn");                lBtn.MergeAttribute("style", "font-family:Webdings;");                lBtn.InnerHtml = ":";                #endregion                int p = model.PageIndex;                #region 判断首尾页                if (model.HasPreviousPage)                {                    string pUrl = link.Replace("%7Bpage%7D", (p - 1).ToString());                    string fUrl = link.Replace("%7Bpage%7D", (1).ToString());                    fBtn.MergeAttribute("href", fUrl);                    pBtn.MergeAttribute("href", pUrl);                }                else                {                    fBtn.MergeAttribute("disabled", "disabled");                    pBtn.MergeAttribute("disabled", "disabled");                }                if (model.HasNextPage)                {                    string nUrl = link.Replace("%7Bpage%7D", (p + 1).ToString());                    string lUrl = link.Replace("%7Bpage%7D", model.TotalPages.ToString());                    nBtn.MergeAttribute("href", nUrl);                    lBtn.MergeAttribute("href", lUrl);                }                else                {                    nBtn.MergeAttribute("disabled", "disabled");                    lBtn.MergeAttribute("disabled", "disabled");                }                #endregion                sb.Append(fBtn.ToString());                sb.Append(pBtn.ToString());                #region 生成中间数字                if (showNumber)                {                    int begin = p - 5;                    int end = p + 5;                    if (begin < 1)                    {                        begin = 1;                        end = 11;                    }                    if (end > model.TotalPages)                    {                        end = model.TotalPages;                        begin = end > 11 ? end - 10 : 1;                    }                    for (int i = begin; i <= end; i++)                    {                        TagBuilder num = new TagBuilder("span");                        if (p == i)                        {                            num.AddCssClass("current");                            num.InnerHtml = i.ToString();                        }                        else                        {                            string url = link.Replace("%7Bpage%7D", i.ToString());                            num.AddCssClass("num");                            TagBuilder a = new TagBuilder("a");                            a.MergeAttribute("href", url);                            a.InnerHtml = i.ToString();                            num.InnerHtml = a.ToString()+" ";                        }                        sb.Append(num.ToString());                    }                }                #endregion                sb.Append(nBtn.ToString());                sb.Append(lBtn.ToString());                #region 生成页信息                TagBuilder index = new TagBuilder("span");                index.AddCssClass("num");                index.InnerHtml = p.ToString();                TagBuilder pagecount = new TagBuilder("span");                pagecount.AddCssClass("num");                pagecount.InnerHtml = model.TotalPages.ToString();                TagBuilder pagesize = new TagBuilder("span");                pagesize.AddCssClass("num");                pagesize.InnerHtml = model.PageSize.ToString();                TagBuilder count = new TagBuilder("span");                count.AddCssClass("num");                count.InnerHtml = model.TotalCount.ToString();                sb.Append(string.Format(" 第{0}页/共{1}页 每页{2}条记录 合计{3}条", index.ToString(), pagecount.ToString(), pagesize.ToString(), count.ToString()));                root.InnerHtml = sb.ToString();                text = root.ToString();                #endregion            }            return text;        }

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