本文實例講述了Asp.net(C#)讀取數據庫并生成JS文件制作首頁圖片切換效果的方法。分享給大家供大家參考，具體如下：

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>

  /// 利用模板生成靜態(tài)頁面

  /// </summary>

  /// <param name="strTitle">標題</param>

  /// <param name="strText">作者</param>

  /// <param name="strContent">發(fā)布時間</param>

  /// <param name="strAuthor">內容</param>

  /// <returns>生成頁面名稱</returns>

  public static string WriteFile(string strTitle, string strAuthor, string strDate, string strContent)

  {

    string path = HttpContext.Current.Server.MapPath("~/");

    Encoding code = Encoding.GetEncoding("gb2312");

    // 讀取模板文件

    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(); // 讀取文件

    }

    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;

    // 替換內容

    str = str.Replace("$biaoti", strTitle);

    str = str.Replace("$author", strAuthor);

    str = str.Replace("$datetime", strDate);

    str = str.Replace("$content", strContent);

    // 寫文件

    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", "測試 <br>");

  }

}

Template.html

<table>

  <tr>

    <td align="center">$biaoti</td>

  </tr>

  <tr>

    <td align="center">作者：$author  發(fā)布時間：$datetime</td>

  </tr>

  <tr>

    <td>$content</td>

  </tr>

</table>

思路：首先讀取數據庫中圖片，鏈接，說明文字等數據，然后將讀取到的數據寫入首頁圖片切換效果的JS文件。

下面代碼實現向數據庫中增加 圖片、鏈接、說明文字等數據 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) //增加幻燈片,將信息寫入數據庫     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幻燈文件     string jsfile,jstemplete;

    string strlnk, strpic, strtxt;

    strlnk = null;

    strpic = null;

    strtxt = null;

    jsfile = Server.MapPath("~/Js/") + "SlideImg.js";  //JS文件路徑

    jstemplete = Server.MapPath("~/Js/") + "JsTemplete.js";  //JS文件模板路徑

    deljs(jsfile); //刪除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(); // 讀取文件     catch (Exception exp)       HttpContext.Current.Response.Write("<script type='text/javascript'>alert('讀取模板文件錯誤！')</script>" + exp.Message);

      HttpContext.Current.Response.End();

      sr.Close();

    }

    // 替換內容     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文件出錯！')</script>" + ex.Message);

      HttpContext.Current.Response.End();     finally       sw.Flush();

      sw.Close();

    }

  }

//以下是自定義刪除原有JS文件函數

  protected void deljs(string jsfile)     if (File.Exists(jsfile))       File.Delete(jsfile);     else       Response.Write("<script type='text/javascript'>alert('系統(tǒng)中不存在能產生首頁切換圖片的文件！')</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='$txt$' //將被替換的內容（切換圖片的說明文字）

pics='$pic$' //將被替換的內容（切換圖片的地址）

links='$lnk$' //將被替換的內容（鏈接地址）

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+'&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>');

辦法三

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

js.aspx輸出的是js內容就可以了

然后在這個abc.aspx里讀取數據庫，并生成document.write輸出新聞的語句

<%@ Page Language="C#" AutoEventWireup="true" %>

var focus_width="asdasdasdwer";

document.write(focus_width);

希望本文所述對大家asp.net程序設計有所幫助。