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Asp.net(C#)读取数据库并生成JS文件制作首页图片切换效果(附demo源码下载)

时间：2021-07-01 10:21:17 帮助过：9人阅读

本文实例讲述了Asp.net(C#)读取数据库并生成JS文件制作首页图片切换效果的方法。分享给大家供大家参考，具体如下：

  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Web;
  5. using System.Web.UI;
  6. using System.Web.UI.WebControls;
  7. using System.Text;
  8. using System.IO;
  9. public partial class _Default : System.Web.UI.Page
  10. {
  11.   protected void Page_Load(object sender, EventArgs e)
  12.   {
  13.   }
  14.   /// <summary>
  15.   /// 利用模板生成静态页面
  16.   /// </summary>
  17.   /// <param name="strTitle">标题</param>
  18.   /// <param name="strText">作者</param>
  19.   /// <param name="strContent">发布时间</param>
  20.   /// <param name="strAuthor">内容</param>
  21.   /// <returns>生成页面名称</returns>
  22.   public static string WriteFile(string strTitle, string strAuthor, string strDate, string strContent)
  23.   {
  24.     string path = HttpContext.Current.Server.MapPath("~/");
  25.     Encoding code = Encoding.GetEncoding("gb2312");
  26.     // 读取模板文件
  27.     string temp = HttpContext.Current.Server.MapPath("~/Template.html");
  28.     StreamReader sr = null;
  29.     StreamWriter sw = null;
  30.     string str = "";
  31.     try
  32.     {
  33.       sr = new StreamReader(temp, code);
  34.       str = sr.ReadToEnd(); // 读取文件
  35.     }
  36.     catch (Exception exp)
  37.     {
  38.       HttpContext.Current.Response.Write(exp.Message);
  39.       HttpContext.Current.Response.End();
  40.       sr.Close();
  41.     }
  42.     Random rd = new Random();
  43.     string strRd = rd.Next(0, 9999).ToString();
  44.     string htmlfilename = DateTime.Now.ToString("yyyyMMddHHmmss") + strRd + ".html";
  45.     DateTime dtNow = DateTime.Now;
  46.     // 替换内容
  47.     str = str.Replace("$biaoti", strTitle);
  48.     str = str.Replace("$author", strAuthor);
  49.     str = str.Replace("$datetime", strDate);
  50.     str = str.Replace("$content", strContent);
  51.     // 写文件
  52.     try
  53.     {
  54.       string pathUrl = path + dtNow.Year + "\\" + dtNow.Month + "\\" + dtNow.Day;
  55.       if (!Directory.Exists(pathUrl))
  56.       {
  57.         Directory.CreateDirectory(pathUrl);
  58.       }
  59.       sw = new StreamWriter(pathUrl + "\\" + htmlfilename, false, code);
  60.       sw.Write(str);
  61.       sw.Flush();
  62.     }
  63.     catch (Exception ex)
  64.     {
  65.       HttpContext.Current.Response.Write(ex.Message);
  66.       HttpContext.Current.Response.End();
  67.     }
  68.     finally
  69.     {
  70.       sw.Close();
  71.     }
  72.     return dtNow.Year.ToString() + "/" + dtNow.Month.ToString() + "/" + dtNow.Day.ToString() + "/" + htmlfilename;
  73.   }
  74.   protected void Button1_Click(object sender, EventArgs e)
  75.   {
  76.     WriteFile("title" , "ttttttt" , "2011-09-27", "测试 <br>");
  77.   }
  78. }

Template.html

  1. <table>
  2.   <tr>
  3.     <td align="center">$biaoti</td>
  4.   </tr>
  5.   <tr>
  6.     <td align="center">作者：$author  发布时间：$datetime</td>
  7.   </tr>
  8.   <tr>
  9.     <td>$content</td>
  10.   </tr>
  11. </table>

思路：首先读取数据库中图片，链接，说明文字等数据，然后将读取到的数据写入首页图片切换效果的JS文件。

下面代码实现向数据库中增加 图片、链接、说明文字等数据 和 生成JS文件

  1. using System;
  2. using System.Data;
  3. using System.Configuration;
  4. using System.Collections;
  5. using System.Web;
  6. using System.Web.Security;
  7. using System.Web.UI;
  8. using System.Web.UI.WebControls;
  9. using System.Web.UI.WebControls.WebParts;
  10. using System.Web.UI.HtmlControls;
  11. using System.Data.OleDb;
  12. using System.IO;
  13. using System.Text;
  14. public partial class Admin_Slide : System.Web.UI.Page   protected void Page_Load(object sender, EventArgs e)
  15.   {
  16.   }
  17.   protected void Add_Btn_Click(object sender, EventArgs e) //增加幻灯片,将信息写入数据库     string imgpath;
  18.     imgpath = "../UpLoadFiles/SlideImg/" + ImgUp.FileName;
  19.     ImgUp.SaveAs(Server.MapPath(imgpath));
  20.     MyOleDb mc = new MyOleDb();
  21.     mc.ConnOpen();
  22.     OleDbCommand cmd = new OleDbCommand("insert into SlideImg(lnk,pic,txt) values ('" + linkarea.Text.ToString() + "','" + imgpath + "','" + imgtitle.Text.ToString() + "');", mc.Conn);
  23.     OleDbDataReader rdr = null;
  24.     rdr = cmd.ExecuteReader();
  25.     mc.ConnClose();
  26.   }
  27.   protected void MJS_Btn_Click(object sender, EventArgs e) //生成JS幻灯文件     string jsfile,jstemplete;
  28.     string strlnk, strpic, strtxt;
  29.     strlnk = null;
  30.     strpic = null;
  31.     strtxt = null;
  32.     jsfile = Server.MapPath("~/Js/") + "SlideImg.js";  //JS文件路径
  33.     jstemplete = Server.MapPath("~/Js/") + "JsTemplete.js";  //JS文件模板路径
  34.     deljs(jsfile); //删除JS文件
  35.     MyOleDb mc = new MyOleDb();
  36.     mc.ConnOpen();
  37.     OleDbCommand cmd = new OleDbCommand("select top " + Img_Num.Text.ToString() + " * from SlideImg order by id desc", mc.Conn);
  38.     OleDbDataReader rdr = null;
  39.     rdr = cmd.ExecuteReader();
  40.     while (rdr.Read())       strlnk += rdr["lnk"].ToString() + "|";
  41.       strpic += rdr["pic"].ToString() + "|";
  42.       strtxt += rdr["txt"].ToString() + "|";     mc.ConnClose();
  43.     Encoding code = Encoding.GetEncoding("UTF-8");
  44.     StreamReader sr = null;
  45.     StreamWriter sw = null;
  46.     string str = "";
  47.     try       sr = new StreamReader(jstemplete, code);
  48.       str = sr.ReadToEnd(); // 读取文件     catch (Exception exp)       HttpContext.Current.Response.Write("<script type='text/javascript'>alert('读取模板文件错误！')</script>" + exp.Message);
  49.       HttpContext.Current.Response.End();
  50.       sr.Close();
  51.     }
  52.     // 替换内容     str = str.Replace("$txt$", strtxt);
  53.     str = str.Replace("$pic$", strpic);
  54.     str = str.Replace("$lnk$", strlnk);
  55.     try       sw = new StreamWriter(jsfile, false, code);
  56.       sw.Write(str);
  57.       sw.Flush();     catch (Exception ex)       HttpContext.Current.Response.Write("<script type='text/javascript'>alert('生成JS文件出错！')</script>" + ex.Message);
  58.       HttpContext.Current.Response.End();     finally       sw.Flush();
  59.       sw.Close();
  60.     }
  61.   }
  62. //以下是自定义删除原有JS文件函数
  63.   protected void deljs(string jsfile)     if (File.Exists(jsfile))       File.Delete(jsfile);     else       Response.Write("<script type='text/javascript'>alert('系统中不存在能产生首页切换图片的文件！')</script>");   }
  64. }

JS文件模板 JsTemplete.js

  1. var focus_width=300;
  2. var focus_height=225;
  3. var text_height=18;
  4. var swf_height = focus_height+text_height;
  5. var pics,links,texts;
  6. texts='$txt$' //将被替换的内容（切换图片的说明文字）
  7. pics='$pic$' //将被替换的内容（切换图片的地址）
  8. links='$lnk$' //将被替换的内容（链接地址）
  9. pics=pics.substr(0,pics.length-1);
  10. links=links.substr(0,links.length-1);
  11. texts=texts.substr(0,texts.length-1);
  12. var fv="pics="+pics+"&links="+links+"&texts="+texts+"&borderwidth="+focus_width+"&borderheight="+focus_height+"&textheight="+text_height;
  13. document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" width="'+ focus_width +'" height="'+ swf_height +'">');
  14. document.write('<param name="allowScriptAccess" value="sameDomain"><param name="movie" value="../Plugin/slide.swf"><param name="quality" value="high"><param name="bgcolor" value="#E5ECF4">');
  15. document.write('<param name="menu" value="false"><param name=wmode value="opaque">');
  16. document.write('<param name="FlashVars" value="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'">');
  17. document.write('<embed src="pixviewer.swf" wmode="opaque" FlashVars="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'" menu="false" bgcolor="#009900" quality="high" width="'+ focus_width +'" height="'+ focus_height +'" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
  18. document.write('</object>');

办法三

  1. <script language="javascript" src="js.aspx?classid=2"> </script>

js.aspx输出的是js内容就可以了

然后在这个abc.aspx里读取数据库，并生成document.write输出新闻的语句

  1. <%@ Page Language="C#" AutoEventWireup="true" %>
  2. var focus_width="asdasdasdwer";
  3. document.write(focus_width);

完整实例代码点击此处本站下载。

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