/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="output"></param>
public override void Process(TagHelperContext context, TagHelperOutput output)
{
//分页model为空
if (Paging == null)
{
return;
}
//没有数据
if (Paging.TotalCount <= 0)
{
return;
}
string routeName = Paging.RouteName;
string controller = "", action = "";
if (String.IsNullOrEmpty(routeName))
{
if (ViewContext.ActionDescriptor.AttributeRouteInfo != null)
{
if (!String.IsNullOrEmpty(ViewContext.ActionDescriptor.AttributeRouteInfo.Name))
{
routeName = ViewContext.ActionDescriptor.AttributeRouteInfo.Name;
}
}
}
if (String.IsNullOrEmpty(routeName))
{
controller = ViewContext.ActionDescriptor.RouteValues["controller"];
action = ViewContext.ActionDescriptor.RouteValues["action"];
}
IUrlHelper urlHelper = new UrlHelperFactory().GetUrlHelper(ViewContext);
//连接地址
string urlString = null;
if (!String.IsNullOrEmpty(routeName))
{
urlString = urlHelper.RouteUrl(routeName, Paging.RouteArg);
}
else
{
urlString = urlHelper.Action(action, controller, Paging.RouteArg);
}
urlString = urlString.Any(o => o == '?') ? urlString + "&page={0}&size={1}" : urlString + "?page={0}&size={1}";
StringBuilder sb = new StringBuilder();
//默认显示最多7个连续按钮
int display = 7;
int minDisplay = 1;
int maxDisplay = 7;
if (Paging.TotalPages > display)
{
if (Paging.PageIndex + display / 2 >= Paging.TotalPages)
{
maxDisplay = Paging.TotalPages;
minDisplay = Paging.TotalPages - display;
}
else if (Paging.PageIndex > display / 2)
{
minDisplay = Paging.PageIndex - display / 2;
maxDisplay = Paging.PageIndex + display / 2;
}
}
else
{
minDisplay = 1;
maxDisplay = Paging.TotalPages;
}
string href = Ajax ? "href=\"javascript:\" data-href" : "href";
sb.Append("<nav><ul class=\"pagination\">");
sb.AppendFormat($"<li class=\"disabled\"><a>当前{Paging.PageIndex}/{Paging.TotalPages}页 共{Paging.TotalCount}条</a></li>");
#region 一页
if (Paging.HasPreviousPage)
{
sb.AppendFormat($"<li><a {href}=\"{String.Format(urlString, Paging.PageIndex - 1, Paging.PageSize)}\">上一页</a></li>");
}
else
{
sb.Append("<li class=\"disabled\"><a href=\"javascript: \">上一页</a></li>");
}
#endregion
if (Paging.PageIndex > display / 2 + 2)
{
sb.Append($"<li><a {href} = \"{String.Format(urlString, 1, Paging.PageSize)}\" >1</a></li>");
sb.Append("<li><a href=\"javascript:\">...</a></li>");
}
//else if (Paging.PageIndex == display / 2 + 2)
//{
// sb.Append($"<li><a {href}=\"{String.Format(urlString, 1, Paging.PageSize)}\">1</a></li>");
//}
for (int i = minDisplay; i <= maxDisplay; i++)
{
if (i == Paging.PageIndex)
{
sb.Append($"<li class=\"active\"><a href = \"javascript:\" >{i}</a></li>");
}
else
{
sb.Append($"<li><a {href} = \"{String.Format(urlString, i, Paging.PageSize)}\">{i}</a></li>");
}
}
if (maxDisplay + 1 < Paging.TotalPages)
{
sb.Append("<li><a href=\"javascript:\" >...</ a ></li>");
sb.AppendFormat($"<li><a {href} = \"{String.Format(urlString, Paging.TotalPages, Paging.PageSize)}\" >{Paging.TotalPages}</a></li>");
}
else if (maxDisplay + 1 == Paging.TotalPages)
{
sb.Append($"<li><a {href}= \"{String.Format(urlString, Paging.TotalPages, Paging.PageSize)}\" >{Paging.TotalPages}</a></li>");
}
#region 一页
if (Paging.HasNextPage)
{
sb.Append($"<li class=\"next\"><a {href}=\"{String.Format(urlString, Paging.PageIndex + 1, Paging.PageSize)}\">下一页</a></li>");
}
else
{
sb.Append("<li class=\"disabled\"><a href=\"javascript:\">下一页</a></li>");
}
#endregion
sb.Append("<li> </li>");
#region 每页条数选择按钮
sb.Append("<li> ");
sb.Append("<div class=\"btn-group\">");
sb.Append("<button type=\"button\" class=\"btn btn-white dropdown-toggle btn-sm\" style=\"padding:6px 10px;\" data-toggle=\"dropdown\">");
sb.AppendFormat("每页{0}条 <span class=\"ace-icon fa fa-caret-down icon-on-right\"></span>", Paging.PageSize);
sb.Append("</button>");
sb.Append("<ul class=\"dropdown-menu\" role=\"menu\">");
sb.Append($"<li><a {href}=\"{String.Format(urlString, Paging.PageIndex, 20)}\">每页20条</a></li>");
sb.Append($"<li><a {href}=\"{String.Format(urlString, Paging.PageIndex, 30)}\">每页30条</a></li>");
sb.Append($"<li><a {href}=\"{String.Format(urlString, Paging.PageIndex, 50)}\">每页50条</a></li>");
sb.Append($"<li><a {href}=\"{String.Format(urlString, Paging.PageIndex, 100)}\">每页100条</a></li>");
sb.Append("</ul>");
sb.Append("</div>");
sb.Append("</li>");
#endregion
sb.Append("</ul></nav>");
#region jquery操作
if (Ajax)
{
sb.Append("<script>");
sb.Append("$(function(){" +
"$('.pagination a[data-href]').click(function(e){" +
"e.preventDefault();" +
"layer.load(2);" +
"var href = $(this).data('href');" +
"$.ajax({" +
"url:href," +
"type:'POST'," +
"success:function(html){" +
"$('" + DataBox + "').html(html);" +
"$('html').scrollTop(0)}," +
"error:function(){" +
"layer.msg('请求数据错误');" +
"},complete:function(){" +
"layer.closeAll();" +
"}" +
"});" +
"});" +
"})");
sb.Append("</script>");
}
#endregion
output.Content.SetHtmlContent(sb.ToString());
}
/// <summary>
/// 分页方法
/// </summary>
/// <param name="html"></param>
/// <param name="routeName">使用的路由名称</param>
/// <param name="routeValues">使用的路由的值</param>
/// <param name="option">分页选项</param>
/// <returns></returns>
public static HtmlString Pager(this IHtmlHelper html, string routeName, RouteValueDictionary routeValues, IPagerOption option)
{
//初始化
var routeData = html.ViewContext.RouteData;
if (routeData == null)
{
return(HtmlString.Empty);
}
var url = new UrlHelperFactory().GetUrlHelper(new ActionContext(html.ViewContext.HttpContext, routeData, html.ViewContext.ActionDescriptor));
if (routeValues == null)
{
routeValues = new RouteValueDictionary();
}
//计算分页信息
var pageCount = option.DataCount / option.PageSize;
if (option.DataCount % option.PageSize != 0)
{
pageCount += 1;
}
var strs = new StringBuilder();
if (option.PageIndex < 1)
{
option.PageIndex = 1;
}
else if (option.PageIndex > pageCount)
{
option.PageIndex = pageCount;
}
if (pageCount <= 1)
{
return(HtmlString.Empty);
}
strs.AppendFormat("<ul class='{0}'>", option.PagerClassName);
if (option.ShowDataCount)
{
strs.AppendFormat("<li><span class='{1}'>{0}</span></li>", string.Format(option.DataCountTextFormat, option.DataCount), option.PagerStatusClassName);
}
//添加分页状态
if (option.ShowPagerStatus)
{
strs.AppendFormat("<li><span class='{0}'>{1}</span></li>", option.PagerStatusClassName, string.Format(option.PagerStatusTextFormat, option.PageIndex, pageCount));
}
//判断路由值中是否包含页码参数,不存在就添加
if (routeValues.ContainsKey(option.PageIndexParamName))
{
routeValues[option.PageIndexParamName] = 1;
}
else
{
routeValues.Add(option.PageIndexParamName, 1);
}
//添加首页按钮
if (option.ShowFirstLastPageButton)
{
if (option.PageIndex != 1)
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.FirstPageButtonText, option.FirstPageButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.FirstPageButtonText, option.FirstPageButtonClassName);
}
}
//计算按钮分组
int btnGroupNum = pageCount / option.PageButtonCount;//按钮分组的个数
if (pageCount % option.PageButtonCount != 0)
{
btnGroupNum += 1;
}
int btnGroupIndex = option.PageIndex / option.PageButtonCount;//当前按钮分组的索引
if (option.PageIndex % option.PageButtonCount != 0)
{
btnGroupIndex += 1;
}
//添加上一组按钮
if (option.ShowPreNextGroupButton)
{
if (btnGroupIndex > 1)
{
int preGroupIndex = btnGroupIndex - 1;
int preGroupBtnStart = preGroupIndex * option.PageButtonCount;
routeValues[option.PageIndexParamName] = preGroupBtnStart;
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.PreGroupButtonText, option.PreGroupButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.PreGroupButtonText, option.PreGroupButtonClassName);
}
}
//添加上一页按钮
if (option.ShowPreNextPageButton)
{
if (option.PageIndex > 1)
{
routeValues[option.PageIndexParamName] = option.PageIndex > 1 ? option.PageIndex - 1 : option.PageIndex;
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.PrePageButtonText, option.PrePageButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.PrePageButtonText, option.PrePageButtonClassName);
}
}
//添加数字按钮
var btnStart = option.PageIndex - option.PageButtonCount / 2;
if (btnStart <= 0)
{
btnStart = 1;
}
if (!option.CurrentPageInCenter)
{
btnStart = ((btnGroupIndex - 1) * option.PageButtonCount) + 1;
}
var btnEnd = btnStart + option.PageButtonCount;
for (int i = btnStart; i < btnEnd; i++)
{
if (i <= pageCount)
{
routeValues[option.PageIndexParamName] = i;
if (i == option.PageIndex)
{
strs.AppendFormat("<li class='{2}'><a href='{0}' class='{2}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), i, option.CurrentPageClassName);
}
else
{
strs.AppendFormat("<li><a href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), i);
}
}
}
//添加下一页按钮
if (option.ShowPreNextPageButton)
{
if (option.PageIndex < pageCount)
{
routeValues[option.PageIndexParamName] = option.PageIndex + 1 > pageCount ? pageCount : option.PageIndex + 1;
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.NextPageButtonText, option.NextPageButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.NextPageButtonText, option.NextPageButtonClassName);
}
}
//添加下一组按钮
if (option.ShowPreNextGroupButton)
{
if (btnGroupIndex < btnGroupNum)
{
int nextGroupIndex = btnGroupIndex + 1;
int nextGroupBtnStart = ((nextGroupIndex - 1) * option.PageButtonCount) + 1;
routeValues[option.PageIndexParamName] = nextGroupBtnStart;
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.NextGroupButtonText, option.NextGroupButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.NextGroupButtonText, option.NextGroupButtonClassName);
}
}
//添加尾页按钮
if (option.ShowFirstLastPageButton)
{
if (option.PageIndex < pageCount)
{
routeValues[option.PageIndexParamName] = pageCount;
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", url.RouteUrl(routeName, routeValues), option.LastPageButtonText, option.LastPageButtonClassName);
}
else
{
strs.AppendFormat("<li><a class='{2}' href='{0}'>{1}</a></li>", "javascript:void(0)", option.LastPageButtonText, option.LastPageButtonClassName);
}
}
//添加跳转区域
if (option.ShowGotoPanel)
{
var txtId = Guid.NewGuid().ToString();
string funcName = "func_" + Guid.NewGuid().ToString().Replace("-", "");
strs.AppendFormat("<li><input type='text' class='{0}' id='{1}'/>", option.GotoPageInputClassName, txtId);
strs.AppendFormat("<a class='{0}' href='javascript:{2}();'>{1}</a></li>", option.GotoPageButtonClassName, option.GotoPageBtuttonText, funcName);
string js = @"<script type='text/javascript'>
function funcName()
{
var pageIndex=document.getElementById('{0}').value;
if(pageIndex.length==0 || !/[1-9][0-9]*/.test(pageIndex))return;
var url=location.toString().toLowerCase();
if (url.indexOf('{1}')<0) {
if (url.indexOf('?')<0) {
url+='?{1}='+pageIndex;
}
else {
url+='&{1}='+pageIndex;
}
}
else
{
var reg=/{1}=-?[0-9]+/;
url=url.replace(reg,'{1}='+pageIndex);
}
location=url;
}
</script>";
js = js.Replace("funcName", funcName).Replace("{0}", txtId).Replace("{1}", option.PageIndexParamName.ToLower());
strs.Append(js);
}
//结束
strs.Append("</ul>");
return(new HtmlString(strs.ToString()));
}