本文實(shí)例講述了Asp.net(C#)讀取數(shù)據(jù)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(biāo)題/param>
/// param name="strText">作者/param>
/// param name="strContent">發(fā)布時間/param>
/// param name="strAuthor">內(nèi)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(nèi)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">$biaoti/td>
/tr>
tr>
td align="center">作者：$authornbsp;nbsp;發(fā)布時間：$datetime/td>
/tr>
tr>
td>$content/td>
/tr>
/table>
思路：首先讀取數(shù)據(jù)庫中圖片，鏈接，說明文字等數(shù)據(jù)，然后將讀取到的數(shù)據(jù)寫入首頁圖片切換效果的JS文件。
下面代碼實(shí)現(xiàn)向數(shù)據(jù)庫中增加 圖片、鏈接、說明文字等數(shù)據(jù) 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(shù)據(jù)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(nèi)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(shù)
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(chǎn)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(nèi)容（切換圖片的說明文字）
pics='$pic$' //將被替換的內(nèi)容（切換圖片的地址）
links='$lnk$' //將被替換的內(nèi)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(nèi)容就可以了
然后在這個abc.aspx里讀取數(shù)據(jù)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);
完整實(shí)例代碼點(diǎn)擊此處本站下載。
更多關(guān)于asp.net相關(guān)內(nèi)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(jié)專題》及《asp.net緩存操作技巧總結(jié)》。
希望本文所述對大家asp.net程序設(shè)計(jì)有所幫助。
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