public static class HtmlPager
{
public static MvcHtmlString MvcPager(this HtmlHelper html, string currentPageStr, int pageSize, int totalCount)
{
var queryString = html.ViewContext.HttpContext.Request.QueryString;
int currentPage = 1; //当前页
var totalPages = Math.Max((totalCount + pageSize - 1) / pageSize, 1); //总页数
var dict = new System.Web.Routing.RouteValueDictionary(html.ViewContext.RouteData.Values);
var output = new StringBuilder();
StringBuilder urlformat = new StringBuilder();//url地址
foreach (string item in dict.Keys)
{
urlformat.Append("/" + dict[item].ToString());
}
urlformat.Append("?");
if (!string.IsNullOrEmpty(queryString[currentPageStr]))
{
//与相应的QueryString绑定
foreach (string key in queryString.Keys)
if (queryString[key] != null && !string.IsNullOrEmpty(key))
dict[key] = queryString[key];
int.TryParse(queryString[currentPageStr], out currentPage);
}
else
{
//获取 ～/Page/{page number} 的页号参数
if (dict.ContainsKey(currentPageStr))
int.TryParse(dict[currentPageStr].ToString(), out currentPage);
}
foreach (string item in queryString.Keys)
{
if (item != currentPageStr)
{
urlformat.Append(item + "=" + queryString[item].ToString() + "&");
}
}
urlformat.Append(currentPageStr + "=");
string strUrlformat = urlformat.ToString();
//保留查询字符到下一页
foreach (string key in queryString.Keys)
dict[key] = queryString[key]; //如果有需要，保留表单值到下一页 (我暂时不需要， 所以注释掉)
//var formValue = html.ViewContext.HttpContext.Request.Form;
//foreach (string key in formValue.Keys)
// if (formValue[key] != null && !string.IsNullOrEmpty(key))
// dict[key] = formValue[key]; if (currentPage <= 0) currentPage = 1;
if (totalPages > 0)
{
output.AppendFormat("共{0}页 ", totalPages);//这个统计加不加都行
//if (currentPage != 1)//第一页时不显示
//{
//处理首页连接 永远显示
//dict[currentPageStr] = 1;
//output.AppendFormat("{0} ", html.RouteLink("首页", dict));
output.Append("<a href='" + urlformat + "1'>首页</a>");
//}
if (currentPage > 1)
{
//处理上一页的连接
//dict[currentPageStr] = currentPage - 1;
//output.Append(html.RouteLink("上一页", dict));
output.Append("<a href='" + strUrlformat + (currentPage - 1) + "'>上一页</a>");
}
else
{
output.Append("<a href='javascript:void(0);'>上一页</a>");
//output.Append("上一页");
}
output.Append(" ");
int currint = 2;
for (int i = 0; i <= 4; i++)
{
//一共最多显示5个页码，前面2个，后面2个
if ((currentPage + i - currint) >= 1 && (currentPage + i - currint) <= totalPages)
if (currint == i)
{
//当前页处理
output.Append(string.Format("<a class='Cur01' href='javascript:void(0);'>{0}</a>", currentPage));
//output.Append(string.Format("[{0}]", currentPage));
}
else
{
//一般页处理
//dict[currentPageStr] = currentPage + i - currint;
//output.Append(html.RouteLink((currentPage + i - currint).ToString(), dict));
output.Append("<a href='" + strUrlformat + (currentPage + i - currint) + "'>" + (currentPage + i - currint) + "</a>");
}
output.Append(" ");
}
if (currentPage < totalPages)
{
//处理下一页的链接
//dict[currentPageStr] = currentPage + 1;
//output.Append(html.RouteLink("下一页", dict));
output.Append("<a href='" + strUrlformat + (currentPage + 1) + "'>下一页</a>");
}
else
{
output.Append("<a href='javascript:void(0);'>下一页</a>");
//output.Append("下一页");
}
output.Append(" ");
//if (currentPage != totalPages)//最后一页时不显示
//{
//dict[currentPageStr] = totalPages;
//output.Append(html.RouteLink("尾页", dict));
output.Append("<a href='" + strUrlformat + (totalPages) + "'>尾页</a>");
//}
output.Append(" ");
//output.AppendFormat("{0} / {1}", currentPage, totalPages);//这个统计加不加都行 output.Append(html.TextBox("JumpPage", null, new { Class = "TJump", onkeydown = "return EnterPress(event)" }));
output.Append(" ");
output.Append("<input type='button' value='Go' id='btnJump' data-maxpages='" + totalPages + "' data-urlformat='" + HttpContext.Current.Server.HtmlEncode(strUrlformat) + "' onclick='return gotopage()' />");
}
string rtnStr = output.ToString();
string flagStr = @"[\?&]page=1(?!\d)";//?!负声明，涵义：括号中的模式必须不出现在声明右侧
rtnStr = Regex.Replace(rtnStr, flagStr, "");
return new MvcHtmlString(rtnStr);
}
}
function gotopage() { var pagetarget = $("#JumpPage").val(); var r = new RegExp("^\\s*(\\d+)\\s*$"); if (!r.test(pagetarget)) { alert("请输入有效数字！"); return; } else if (RegExp.$1 < 1 || RegExp.$1 > parseInt($("#btnJump").attr("data-maxpages"))) { alert("超出范围！"); return; } else { location.href = decodeURI($("#btnJump").attr("data-urlformat") + pagetarget) } }
@Html.MvcPager("page", pageSize, count)