生成分页菜单代码,C代码库,德仔网

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【C】生成分页菜单
作者:乞丐88 / 发布于2015/1/4/ 642

	//---------------------------------------------------------------------------
	//用于: 显示记录分页菜单
	//参数：int TotalCount 记录总条数
	// int PageSize 每页显示记录条数
	// int int NowPage 当前页
	// const int PageNumber 页码（意思是前台分页控件显示的页数）
	// String CommonRequestHtml http协议的get请求参数(除page参数外的其余参数)
	//返回值：分页菜单字符串
	String __fastcall GetTurnPageHtml(int TotalCount, int PageSize, int NowPage, const int PageNumber, String CommonRequestHtml)
	{
	 String Result = "";
	
	 //分页必须提供的基本属性
	 int PageCount; //总页数
	
	 //分页基本属性
	 // 左页码属性一
	 int LeftPageNumberOne = 0;
	 // 左页码属性二
	 int LeftPageNumberTwo = 0;
	 // 右页码
	 int RightPageNumber = 0;
	
	 //判断如果当前页为负数或者零时， NowPage=1
	 if (NowPage <= 0) {
	 NowPage = 1;
	 }
	 //判断如果当前页大于总页数时，NowPage=PageCount
	 PageCount = GetPageCount(TotalCount, PageSize, 5);
	 if (PageCount <= 0) {
	 return Result;
	 }
	
	 if (NowPage > PageCount) {
	
	 NowPage = PageCount;
	 }
	
	 //生成分页菜单
	 Result = "<div id=\"kkpager\">";
	
	 //去除前后的&符号
	 String ch = LeftStr(CommonRequestHtml, 1);
	 if (ch == "&") {
	 CommonRequestHtml = CommonRequestHtml.SubString(2, CommonRequestHtml.Length() - 1);
	 }
	 ch = RightStr(CommonRequestHtml, 1);
	 if (ch == "&") {
	 CommonRequestHtml = CommonRequestHtml.SubString(1, CommonRequestHtml.Length() - 1);
	 }
	
	 //首页和上一页
	 if (NowPage != 1) {
	 Result += "<a href=\"?" + CommonRequestHtml + "&page=" + IntToStr(NowPage - 1) + "\" title=\"上一页\">上一页</a>";
	 Result += GetPageNumberStr(1, NowPage, CommonRequestHtml);
	 } else {
	 Result += "<span class=\"first\">上一页</span>";
	 if (PageCount == 1) {
	 Result += GetPageNumberStr(1, NowPage, CommonRequestHtml);
	 }
	 }
	
	 //如果分页总页数小于页码数(PageNumber)时，不显示省略号
	 if (PageCount <= PageNumber) {
	 if (PageCount != 1) {
	 int i = 2;
	 int iMax = PageCount - 1;
	 if (NowPage == 1) {
	 i = 1;
	 } else if (NowPage == PageCount) {
	 iMax = PageCount;
	 }
	 for (i; i <= iMax; i++) {
	 Result += GetPageNumberStr(i, NowPage, CommonRequestHtml);
	 }
	 }
	 } else {
	 if (PageNumber % 2 != 0) {
	 LeftPageNumberOne = (PageNumber / 2) + 1;
	 LeftPageNumberTwo = (PageNumber / 2);
	 RightPageNumber = (PageNumber / 2);
	 } else {
	 LeftPageNumberOne = (PageNumber / 2) + 1;
	 LeftPageNumberTwo = (PageNumber / 2);
	 RightPageNumber = (PageNumber / 2) - 1;
	 }
	
	 //总页数大于页码数(PageNumber)时
	 if (NowPage > LeftPageNumberOne && NowPage < PageCount - RightPageNumber) {
	 Result += "<span>...</span>";
	 for (int i = NowPage - LeftPageNumberTwo; i <= NowPage + RightPageNumber; i++) {
	 Result += GetPageNumberStr(i, NowPage, CommonRequestHtml);
	 }
	 Result += "<span>...</span>";
	 } else if (NowPage >= PageCount - RightPageNumber) {
	 int iMax = PageCount;
	 if (NowPage != PageCount) {
	 iMax = PageCount - 1;
	 }
	 Result += "<span>...</span>";
	 for (int i = (PageCount - PageNumber) + 1; i <= iMax; i++) {
	 Result += GetPageNumberStr(i, NowPage, CommonRequestHtml);
	 }
	 } else {
	 int i = 1;
	 if (NowPage != 1) {
	 i = 2;
	 }
	 for (i; i <= PageNumber; i++) {
	 Result += GetPageNumberStr(i, NowPage, CommonRequestHtml);
	 }
	 Result += "<span>...</span>";
	 }
	 }
	
	 //下一页和末页
	 if (NowPage != PageCount) {
	 Result += GetPageNumberStr(PageCount, NowPage, CommonRequestHtml);
	 Result += "<a href=\"?" + CommonRequestHtml + "&page="+ IntToStr(NowPage + 1) + "\" title=\"下一页\">下一页</a>";
	 } else {
	 Result += "<span class=\"last\">下一页</span>";
	 }
	 Result += "</div>";
	 return Result;
	}
	//---------------------------------------------------------------------------
	//计算总页数
	//参数： int PageSize 每页显示的记录条数
	// int TotalCount 总记录条数
	int __fastcall GetPageCount(int TotalCount, int PageSize, const int ISIZE)
	{
	 if (PageSize == 0)
	 PageSize = ISIZE;//每页显示的记录条数为"0",则默认为ISIZE
	 if (TotalCount % PageSize == 0)
	 return (TotalCount / PageSize);
	 else
	 return (TotalCount / PageSize) + 1;
	}
	//---------------------------------------------------------------------------
	//获取单页网页标签
	String __fastcall GetPageNumberStr(int i, int NowPage, String CommonRequestHtml)
	{
	 String Result;
	 if (i == NowPage)
	 Result = "<span class=\"curr\">" + IntToStr(i) + "</span>";
	 else
	 Result = "<a href=\"?"+ CommonRequestHtml +"&page=" + IntToStr(i) + "\" title=\"第" + IntToStr(i) + "页\">" + IntToStr(i) + "</a>";
	 return Result;
	}
	//---------------------------------------------------------------------------
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　分页菜单　　分页　
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