C#页码导航显示及算法实现代码

/// <summary> 
/// 获取分页导航 
/// </summary> 
/// <param name="intPageIndex">页码</param> 
/// <param name="intPageCount">页数</param> 
/// <param name="strUrl">链接</param> 
/// <returns>HTML代码</returns> 
private string GePageNavgation(int intPageIndex, int intPageCount, string strUrl) 
{ 
StringBuilder sb = new StringBuilder("<div class=\"div_pagenavgation\">"); 
if (intPageCount > 1) 
{ 
//页码显示 
if (intPageIndex == 1) 
{ 
sb.Append("<span class=\"disabled\"> < 上一页</span>"); 
} 
else if (intPageIndex > 1) 
{ 
sb.Append("<a href=\"" + strUrl + (intPageIndex - 1).ToString() + "\">< 上一页</a>"); 
} 
bool Dot1 = false, Dot2 = false; 
for (int i = 1; i <= intPageCount; i++) 
{ 
if (i == intPageIndex) 
{ 
sb.Append("<span class=\"current\">" + intPageIndex.ToString() + "</span>"); 
continue; 
} 
if (i <= 3) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (intPageIndex > 7) 
{ 
if (!Dot1) 
{ 
sb.Append("<span class=\"dotted\">...</span>"); 
Dot1 = true; 
} 
} 
if (i == intPageIndex - 3) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (i == intPageIndex - 2) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (i == intPageIndex - 1) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (i == intPageIndex + 1) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (i == intPageIndex + 2) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if (i == intPageIndex + 3) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
if ((intPageCount - intPageIndex) > 6 && i > intPageIndex + 3) 
{ 
if (!Dot2) 
{ 
sb.Append("<span class=\"dotted\">...</span>"); 
Dot2 = true; 
} 
} 
if (i > intPageCount - 3) 
{ 
sb.Append("<a href=\"" + strUrl + i.ToString() + "\">" + i.ToString() + "</a>"); 
continue; 
} 
} 
if (intPageIndex == intPageCount) 
{ 
sb.Append("<span class=\"disabled\">下一页 ></span>"); 
} 
else if (intPageIndex + 1 <= intPageCount) 
{ 
sb.Append("<a href=\"" + strUrl + (intPageIndex + 1).ToString() + "\">下一页 ></a>"); 
} 
} 
sb.Append("</div>"); 
return sb.ToString(); 
} 
 
CSS样式： 
 代码如下:

.div_pagenavgation{ 
margin-top:5px; 
line-height:20px; 
float:right; 
} 
.div_pagenavgation a{ 
float:left; 
text-decoration:none; 
color:#06F; 
margin-left:5px; 
padding-left:5px; 
padding-right:5px; 
height:20px; 
text-align:center; 
display:block; 
border:1px #CCC solid; 
} 
.div_pagenavgation .dotted{ 
float:left; 
} 
.div_pagenavgation .current{ 
float:left; 
margin-left:5px; 
padding-left:5px; 
padding-right:5px; 
height:20px; 
text-align:center; 
display:block; 
border:1px #CCC solid ; 
background-color:#0080C0; 
color:#FFF; 
} 
.div_pagenavgation .disabled{ 
float:left; 
margin-left:5px; 
padding-left:5px; 
padding-right:5px; 
height:20px; 
text-align:center; 
display:block; 
border:1px #CCC solid; 
color:#CCC; 
} 
 
产生的HTML如下： 
 代码如下:

<div class="div_pagenavgation"> 
<a href="?m=log&page=11">< 上一页</a> 
<a href="?m=log&page=1">1</a> 
<a href="?m=log&page=2">2</a> 
<a href="?m=log&page=3">3</a> 
<span class="dotted">...</span> 
<a href="?m=log&page=9">9</a> 
<a href="?m=log&page=10">10</a> 
<a href="?m=log&page=11">11</a> 
<span class="current">12</span> 
<a href="?m=log&page=13">13</a> 
<a href="?m=log&page=14">14</a> 
<a href="?m=log&page=15">15</a> 
<span class="dotted">...</span> 
<a href="?m=log&page=27">27</a> 
<a href="?m=log&page=28">28</a> 
<a href="?m=log&page=29">29</a> 
<a href="?m=log&page=13">下一页 ></a> 
</div> 
 
说明:很久前赶工完成，基本能够实现要求，没有经过仔细优化，谁优化了再回复看看！