private static void SetDefaultValue(PagerBarSettings settings)
{
if (settings.barStyle == BarStyle.defaultStyle)
{
settings.barStyle = BarStyle.quotes;
}
if (settings.PageIndex == 0)
{
settings.PageIndex = 1;
}
if (settings.ShowPageNumber == 0)
{
settings.ShowPageNumber = 3;
}
if (string.IsNullOrEmpty(settings.PreWord))
{
settings.PreWord = "上一页";
}
if (string.IsNullOrEmpty(settings.NextWord))
{
settings.NextWord = "下一页";
}
if (settings.PageCount == 0)
{
settings.PageCount = 20;
}
if (string.IsNullOrEmpty(settings.CurrentPageWordFormat))
{
settings.CurrentPageWordFormat = "{0}";
}
}
public static string PagerBar(this HtmlHelper html, PagerBarSettings settings)
{
SetDefaultValue(settings);//设置默认值
StringBuilder sb = new StringBuilder();
sb.AppendFormat("<div class=\"{0}\" >", settings.barStyle.ToString());
//判断空记录
if (settings.TotalCount == 0)
{
sb.Append(settings.NoRecordTip);
sb.Append("</div>");
return(sb.ToString());
}
int totalPage = Convert.ToInt32((settings.TotalCount - 1) / settings.PageCount) + 1;//总页数
string backPageStyle = (settings.PageIndex <= 1) ? "disabled" : "";
string nextPageStyle = (settings.PageIndex >= totalPage) ? "disabled" : "";
var firstDisplayPageEnd = 0; //从第1页显示到xx页
var bodyDisplayPageStart = 0; //当前页临近最左页码
var bodyDisplayPageEnd = 0; //当前页临近最右页码
var endDisplayPageStart = 0; //从第xx页显示到最后一页
//设定 bodyDisplayPageStart
bodyDisplayPageStart = (settings.PageIndex - settings.ShowPageNumber <= 1) ? 1 : settings.PageIndex - settings.ShowPageNumber; // (ViewData.pageIndex - ViewData.showPageNumber <= ViewData.showPageNumber) ? ViewData.showPageNumber + 1 : ViewData.pageIndex - ViewData.showPageNumber;
//设定 bodyDisplayPageEnd
bodyDisplayPageEnd = (settings.PageIndex + settings.ShowPageNumber >= totalPage) ? totalPage : settings.PageIndex + settings.ShowPageNumber;
//设定 firstDisplayPageEnd
if (bodyDisplayPageStart > 1)
{
if (bodyDisplayPageStart - settings.ShowPageNumber <= 1)
{
firstDisplayPageEnd = bodyDisplayPageStart - 1;
}
else
{
firstDisplayPageEnd = settings.ShowPageNumber;
}
}
else
{
firstDisplayPageEnd = 0;
}
//设定 endDisplayPageStart
if (bodyDisplayPageEnd < totalPage)
{
if (bodyDisplayPageEnd + settings.ShowPageNumber >= totalPage)
{
endDisplayPageStart = bodyDisplayPageEnd + 1;
}
else
{
endDisplayPageStart = totalPage - settings.ShowPageNumber + 1;
}
}
else
{
endDisplayPageStart = totalPage + 1;
}
//页面参数设定结束
//开始输出
// 上一条
if (settings.PageIndex <= 1)
{
sb.Append("<span class=\"").Append(backPageStyle).Append("\">").Append(settings.PreWord).Append("</span>");
}
else
{
sb.Append(GetPageLink(settings.PageIndex - 1, settings.PageIndex, settings.PreWord, settings.CurrentPageWordFormat, settings.Onclick, settings.Url, settings.BarMark, settings.InIframe));
}
//first
for (var i = 1; i <= firstDisplayPageEnd; i++)
{
sb.Append(GetPageLink(i, settings.PageIndex, i.ToString(), settings.CurrentPageWordFormat, settings.Onclick, settings.Url, settings.BarMark, settings.InIframe));
}
//省略号
if (firstDisplayPageEnd + 1 < bodyDisplayPageStart)
{
sb.Append("<span>... </span>");
}
//body
for (var i = bodyDisplayPageStart; i <= bodyDisplayPageEnd; i++)
{
sb.Append(GetPageLink(i, settings.PageIndex, i.ToString(), settings.CurrentPageWordFormat, settings.Onclick, settings.Url, settings.BarMark, settings.InIframe));
}
//省略号
if (bodyDisplayPageEnd + 1 < endDisplayPageStart)
{
sb.Append("<span>... </span>");
}
//end
for (var i = endDisplayPageStart; i <= totalPage; i++)
{
sb.Append(GetPageLink(i, settings.PageIndex, i.ToString(), settings.CurrentPageWordFormat, settings.Onclick, settings.Url, settings.BarMark, settings.InIframe));
}
// 下一条
if (settings.PageIndex >= totalPage)
{
sb.Append("<span class=\"").Append(nextPageStyle).Append("\">").Append(settings.NextWord).Append("</span>");
}
else
{
sb.Append(GetPageLink(settings.PageIndex + 1, settings.PageIndex, settings.NextWord, settings.CurrentPageWordFormat, settings.Onclick, settings.Url, settings.BarMark, settings.InIframe));
}
//总数
if (settings.ShowTotalCount)
{
int recordStart = (settings.PageIndex - 1) * settings.PageCount + 1;
int recordEnd = recordStart + settings.PageCount - 1;
if (recordEnd > settings.TotalCount)
{
recordEnd = settings.TotalCount;//如果超出最大值，则修正为最大值
}
sb.Append("<span class=\"total\" title=\"当前显示第" + (recordStart == recordEnd ? recordStart.ToString() : (recordStart + "-" + recordEnd)) + "条\">总共 <b>" + settings.TotalCount.ToString() + "</b> 条</span>");
}
sb.Append("</div>");
return(sb.ToString());
}
public static string PagerBar <T>(this HtmlHelper html, PagedList <T> dataSource, PagerBarSettings settings) where T : class
{
settings = settings ?? new PagerBarSettings();
settings.PageIndex = dataSource.PageIndex;
settings.PageCount = dataSource.PageCount;
settings.TotalCount = dataSource.TotalCount;
return(PagerBar(html, settings));
}