Asp.net(C#)讀取數據庫並生成JS文件制作首頁圖片切換效果(附demo源碼下載)

本文實例講述了Asp.net(C#)讀取數據庫並生成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>
  /// 利用模板生成靜態頁面
  /// </summary>
  /// <param name="strTitle">標題</param>
  /// <param name="strText">作者</param>
  /// <param name="strContent">發布時間</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，然後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

然後在這個abc.aspx裡讀取數據庫，並生成document.write輸出新聞的語句

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

完整實例代碼點擊此處本站下載。

更多關於asp.net相關內容感興趣的讀者可查看本站專題：《asp.net文件操作技巧匯總》、《asp.net ajax技巧總結專題》及《asp.net緩存操作技巧總結》。

希望本文所述對大家asp.net程序設計有所幫助。