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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>");
}
}
</div>
Template.html
<table>
<tr>
<td align="center">$biaoti</td>
</tr>
<tr>
<td align="center">作者：$author 发布时间：$datetime</td>
</tr>
<tr>
<td>$content</td>
</tr>
</table>
</div>
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>"); }
}
</div>
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="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" 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+