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标题 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)
内容
    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：
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Text;
    using System.IO;
    public partial class _Default : System.Web.UI.Page
    {
      protected void Page_Load(object sender, EventArgs e)
      {
      }
      /// <summary>
      /// 利用模板生成静态页面
      /// </summary>
      /// <param name="strTitle">标题</param>
      /// <param name="strText">作者</param>
      /// <param name="strContent">发布时间</param>
      /// <param name="strAuthor">内容</param>
      /// <returns>生成页面名称</returns>
      public static string WriteFile(string strTitle, string strAuthor, string strDate, string strContent)
      {
        string path = HttpContext.Current.Server.MapPath("~/");
        Encoding code = Encoding.GetEncoding("gb2312");
        // 读取模板文件
        string temp = HttpContext.Current.Server.MapPath("~/Template.html");
        StreamReader sr = null;
        StreamWriter sw = null;
        string str = "";
        try
        {
          sr = new StreamReader(temp, code);
          str = sr.ReadToEnd(); // 读取文件
        }
        catch (Exception exp)
        {
          HttpContext.Current.Response.Write(exp.Message);
          HttpContext.Current.Response.End();
          sr.Close();
        }
        Random rd = new Random();
        string strRd = rd.Next(0, 9999).ToString();
        string htmlfilename = DateTime.Now.ToString("yyyyMMddHHmmss") + strRd + ".html";
        DateTime dtNow = DateTime.Now;
        // 替换内容
        str = str.Replace("$biaoti", strTitle);
        str = str.Replace("$author", strAuthor);
        str = str.Replace("$datetime", strDate);
        str = str.Replace("$content", strContent);
        // 写文件
        try
        {
          string pathUrl = path + dtNow.Year + "\\" + dtNow.Month + "\\" + dtNow.Day;
          if (!Directory.Exists(pathUrl))
          {
            Directory.CreateDirectory(pathUrl);
          }
          sw = new StreamWriter(pathUrl + "\\" + htmlfilename, false, code);
          sw.Write(str);
          sw.Flush();
        }
        catch (Exception ex)
        {
          HttpContext.Current.Response.Write(ex.Message);
          HttpContext.Current.Response.End();
        }
        finally
        {
          sw.Close();
        }
        return dtNow.Year.ToString() + "/" + dtNow.Month.ToString() + "/" + dtNow.Day.ToString() + "/" + htmlfilename;
      }
      protected void Button1_Click(object sender, EventArgs e)
      {
        WriteFile("title" , "ttttttt" , "2011-09-27", "测试 <br>");
      }
    }
    Template.html
    <table>
      <tr>
        <td>$biaoti</td>
      </tr>
      <tr>
        <td>作者：$author  发布时间：$datetime</td>
      </tr>
      <tr>
        <td>$content</td>
      </tr>
    </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
    using System;
    using System.Data;
    using System.Configuration;
    using System.Collections;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Web.UI.HtmlControls;
    using System.Data.OleDb;
    using System.IO;
    using System.Text;
    public partial class Admin_Slide : System.Web.UI.Page   protected void Page_Load(object sender, EventArgs e)
      {
      }
      protected void Add_Btn_Click(object sender, EventArgs e) //增加幻灯片,将信息写入数据库     string imgpath;
        imgpath = "../UpLoadFiles/SlideImg/" + ImgUp.FileName;
        ImgUp.SaveAs(Server.MapPath(imgpath));
        MyOleDb mc = new MyOleDb();
        mc.ConnOpen();
        OleDbCommand cmd = new OleDbCommand("insert into SlideImg(lnk,pic,txt) values ('" + linkarea.Text.ToString() + "','" + imgpath + "','" + imgtitle.Text.ToString() + "');", mc.Conn);
        OleDbDataReader rdr = null;
        rdr = cmd.ExecuteReader();
        mc.ConnClose();
      }
      protected void MJS_Btn_Click(object sender, EventArgs e) //生成JS幻灯文件     string jsfile,jstemplete;
        string strlnk, strpic, strtxt;
        strlnk = null;
        strpic = null;
        strtxt = null;
        jsfile = Server.MapPath("~/Js/") + "SlideImg.js";  //JS文件路径
        jstemplete = Server.MapPath("~/Js/") + "JsTemplete.js";  //JS文件模板路径
        deljs(jsfile); //删除JS文件
        MyOleDb mc = new MyOleDb();
        mc.ConnOpen();
        OleDbCommand cmd = new OleDbCommand("select top " + Img_Num.Text.ToString() + " * from SlideImg order by id desc", mc.Conn);
        OleDbDataReader rdr = null;
        rdr = cmd.ExecuteReader();
        while (rdr.Read())       strlnk += rdr["lnk"].ToString() + "|";
          strpic += rdr["pic"].ToString() + "|";
          strtxt += rdr["txt"].ToString() + "|";     mc.ConnClose();
        Encoding code = Encoding.GetEncoding("UTF-8");
        StreamReader sr = null;
        StreamWriter sw = null;
        string str = "";
        try       sr = new StreamReader(jstemplete, code);
          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);
          HttpContext.Current.Response.End();
          sr.Close();
        }
        // 替换内容     str = str.Replace("$txt$", strtxt);
        str = str.Replace("$pic$", strpic);
        str = str.Replace("$lnk$", strlnk);
        try       sw = new StreamWriter(jsfile, false, code);
          sw.Write(str);
          sw.Flush();     catch (Exception ex)       HttpContext.Current.Response.Write("<script type='text/javascript'>alert('生成JS文件出错！')</script>" + ex.Message);
          HttpContext.Current.Response.End();     finally       sw.Flush();
          sw.Close();
        }
      }
    //以下是自定义删除原有JS文件函数
      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>");   }
    }
    JS文件模板 JsTemplete.js
    var focus_width=300;
    var focus_height=225;
    var text_height=18;
    var swf_height = focus_height+text_height;
    var pics,links,texts;
    texts='$txt$' //将被替换的内容（切换图片的说明文字）
    pics='$pic$' //将被替换的内容（切换图片的地址）
    links='$lnk$' //将被替换的内容（链接地址）
    pics=pics.substr(0,pics.length-1);
    links=links.substr(0,links.length-1);
    texts=texts.substr(0,texts.length-1);
    var fv="pics="+pics+"&links="+links+"&texts="+texts+"&borderwidth="+focus_width+"&borderheight="+focus_height+"&textheight="+text_height;
    document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="/uploads/202504/02/swflash2804.cab" width="'+ focus_width +'" height="'+ swf_height +'">');
    document.write('<param name="allowScriptAccess" value="sameDomain"><param name="movie" value="../Plugin/slide.swf"><param name="quality" value="high"><param name="bgcolor" value="#E5ECF4">');
    document.write('<param name="menu" value="false"><param name=wmode value="opaque">');
    document.write('<param name="FlashVars" value="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'">');
    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" />');
    document.write('</object>');
    办法三
    <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
    <%@ Page Language="C#" AutoEventWireup="true" %>
    var focus_width="asdasdasdwer";
    document.write(focus_width);
    希望本文所述对大家asp.net程序设计有所帮助。
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更新时间：2025/5/21 18:12:43