asp.net對于長篇文章進行分頁

對于文章篇幅比較長的，就必須采用分頁顯示。在.net中對長篇文章分頁一般有2種方法，第一種就是先計算好一頁的文字長度是多少，然后把文章總的長度除設置好的單頁文字長度及可，用這方法可以減少認為進行分頁的繁瑣，但是這樣分頁出來的可能不是很正確，因為不能達到想在某些特點位置進行分頁。第二種就是通過人為和程序實現的。由人在新聞添加的時候在需要分頁的地方輸入指定的分頁符號（主要是在文章中不常見的符號比如$$等），然后程序在通過指定的分頁符號進行分頁，這樣就可以做到想在哪分頁就在哪分頁了。而本文也是使用的第二種方法，以下是c#代碼片段:
public string NoHTML(string Htmlstring) //去除HTML標記
{
//刪除腳本
Htmlstring = Regex.Replace(Htmlstring, @" <script[^>]*?>.*? </script>", "", RegexOptions.IgnoreCase);
//刪除HTML
Htmlstring = Regex.Replace(Htmlstring, @" <(.[^>]*)>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @" <!--.*", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", " <", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
Htmlstring.Replace(" <", "");
Htmlstring.Replace(">", "");
Htmlstring.Replace("\r\n", "");
Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
return Htmlstring;
}
public string OutputBySize(string p_strContent)//分頁函數
{
string m_strRet = "";
int m_intPageSize = 2500;//文章每頁大小
int m_intCurrentPage = 1;//設置第一頁為初始頁
int m_intTotalPage = 0;
int m_intArticlelength = NoHTML(p_strContent).Length;//文章長度
if (m_intPageSize < m_intArticlelength)
{//如果每頁大小大于文章長度時就不用分頁了
if (m_intArticlelength % m_intPageSize == 0)
{//set total pages count
m_intTotalPage = m_intArticlelength / m_intPageSize;
}
else
{//if the totalsize
m_intTotalPage = m_intArticlelength / m_intPageSize + 1;
}
if (Request.QueryString["pages"] != null)
{//set Current page number
try
{//處理不正常的地址欄的值
m_intCurrentPage = Convert.ToInt32(Request.QueryString["pages"]);
if (m_intCurrentPage > m_intTotalPage)
m_intCurrentPage = m_intTotalPage;
}
catch
{
m_intCurrentPage = m_intCurrentPage;
}
}
//set the page content 設置獲取當前頁的大小
if (m_intCurrentPage < m_intTotalPage)
{
m_intPageSize = m_intCurrentPage < m_intTotalPage ? m_intPageSize : (m_intArticlelength - m_intPageSize * (m_intCurrentPage - 1));
m_strRet += p_strContent.Substring(m_intPageSize * (m_intCurrentPage - 1), m_intPageSize);
}
else if(m_intCurrentPage == m_intTotalPage )
{
int mm_intPageSize=m_intArticlelength - m_intPageSize * (m_intCurrentPage - 1);
m_strRet += p_strContent.Substring(m_intArticlelength - mm_intPageSize);
}
string m_strPageInfo = " <p> </p>";
for (int i = 1; i <= m_intTotalPage; i++)
{
if (i == m_intCurrentPage)
m_strPageInfo += "第" + i + "頁 | ";
else
m_strPageInfo += " <a href=news_id" + Request.QueryString["wzid"] + "_pages" + i + ".html>" + i + " </a>｜";
}
//輸出顯示各個頁碼
this.labPageNumber.Text = m_strPageInfo;
}
else
{
m_strRet += p_strContent;
}
return m_strRet;
}
protected void Page_Load(object sender, EventArgs e)
{
SqlDataReader dr = shuju.duquzt(Int32.Parse(Request.QueryString["wzid"]));
if (dr == null) return;
if (dr.Read())
{
this.labContent.Text = OutputBySize(dr["wzcontent"].ToString());//調用該函數
...
前臺頁面分頁處使用的控件： <asp:Label ID="labPageNumber" Font-Size="14px" runat="server"> </asp:Label>