Asp.net动态生成html页面
2006-10-13 14:04
435 查看
此功能适用于后台数据库功能不强的web站点,即大部分文本不是存放在数据库的记录中,而是放在html文件或者xml文件中,
仅仅把索引放到数据库中,如文章标题、类别、查询关键字等。这样适合于后台没有诸如MS Sql Server这样的数据库支持的Web站点。
适用于新闻发布系统,比如sina、163等都是采用动态生成html页面的。
适用于需动态定制页面的程序。比如论坛、聊天室等。可以加载定制好的html页面,来加强美观。
思路
1. 利用如Dw-Mx这样的工具生成html格式的模板,在需要添加格式的地方加入特殊标记(如$htmlformat$),
动态生成文件时利用代码读取此模板,然后获得前台输入的内容,添加到此模板的标记位置中,生成新文件名后写入磁盘,
写入后再向数据库中写入相关数据。
2. 使用后台代码硬编码Html文件,可以使用HtmlTextWriter类来写html文件。
优点
1. 可以建立非常复杂的页面,利用包含js文件的方法,在js文件内加入document.write()方法可以在所有页面内加入如页面头,
广告等内容。
2. 静态html文件利用MS Windows2000的Index Server可以建立全文搜索引擎,利用asp.net可以以DataTable的方式得到搜索结果。
而Win2000的Index服务无法查找xml文件的内容。如果包括了数据库搜索与Index索引双重查找,那么此搜索功能将非常强大。
3. 节省服务器的负荷,请求一个静态的html文件比一个aspx文件服务器资源节省许多。
缺点
思路二: 如果用硬编码的方式,工作量非常大,需要非常多的html代码。调试困难。而且使用硬编码生成的html样式无法修改,
如果网站更换样式,那么必须得重新编码,给后期带来巨大的工作量。
因此这里采用的是第一种思路
示列代码
1.定义(template.htm)html模板页面
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<html>
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<head>
3
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<title></title>
4
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
5
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</head>
6
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<body >
7
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<table $htmlformat[0] height="100%" border="0" width="100%" cellpadding="10" cellspacing="0" bgcolor="#eeeeee" style="border:1px solid #000000">
8
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<tr>
9
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<td width="100%" valign="middle" align="left">
10
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<span style="color: $htmlformat[1];font-size: $htmlformat[2]">$htmlformat[3]</span>
11
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</td>
12
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</tr>
13
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</table>
14
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</body>
15
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</html>
2.asp.net代码:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//---------------------读html模板页面到stringbuilder对象里----
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
string[] format=new string[4];//定义和htmlyem标记数目一致的数组
3
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
StringBuilder htmltext=new StringBuilder();
4
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
try
5
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
6
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using (StreamReader sr = new StreamReader("存放模板页面的路径和页面名"))
7
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
8
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
String line;
9
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while ((line = sr.ReadLine()) != null)
10
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
11
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
htmltext.Append(line);
12
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
13
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sr.Close();
14
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
15
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
16
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
catch
17
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
18
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Response.Write("<Script>alert('读取文件错误')</Script>");
19
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
20
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//---------------------给标记数组赋值------------
21
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[0]="background=/"bg.jpg/"";//背景图片
22
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[1]= "#990099";//字体颜色
23
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[2]="150px";//字体大小
24
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[3]= "<marquee>生成的模板html页面</marquee>";//文字说明
25
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//----------替换htm里的标记为你想加的内容
26
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
for(int i=0;i<4;i++)
27
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
28
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
htmltext.Replace("$htmlformat["+i+"]",format[i]);
29
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
30
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//----------生成htm文件------------------――
31
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
try
32
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
33
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using(StreamWriter sw=new StreamWriter("存放路径和页面名",false,System.Text.Encoding.GetEncoding("GB2312")))
34
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
35
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.WriteLine(htmltext);
36
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Flush();
37
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Close();
38
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
39
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
40
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
41
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
catch
42
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
43
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Response.Write ("The file could not be wirte:");
44
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
小结
用此方法可以方便的生成html文件。程序使用了是循环替换,因此对需替换大量元素的模板速度非常快。
仅仅把索引放到数据库中,如文章标题、类别、查询关键字等。这样适合于后台没有诸如MS Sql Server这样的数据库支持的Web站点。
适用于新闻发布系统,比如sina、163等都是采用动态生成html页面的。
适用于需动态定制页面的程序。比如论坛、聊天室等。可以加载定制好的html页面,来加强美观。
思路
1. 利用如Dw-Mx这样的工具生成html格式的模板,在需要添加格式的地方加入特殊标记(如$htmlformat$),
动态生成文件时利用代码读取此模板,然后获得前台输入的内容,添加到此模板的标记位置中,生成新文件名后写入磁盘,
写入后再向数据库中写入相关数据。
2. 使用后台代码硬编码Html文件,可以使用HtmlTextWriter类来写html文件。
优点
1. 可以建立非常复杂的页面,利用包含js文件的方法,在js文件内加入document.write()方法可以在所有页面内加入如页面头,
广告等内容。
2. 静态html文件利用MS Windows2000的Index Server可以建立全文搜索引擎,利用asp.net可以以DataTable的方式得到搜索结果。
而Win2000的Index服务无法查找xml文件的内容。如果包括了数据库搜索与Index索引双重查找,那么此搜索功能将非常强大。
3. 节省服务器的负荷,请求一个静态的html文件比一个aspx文件服务器资源节省许多。
缺点
思路二: 如果用硬编码的方式,工作量非常大,需要非常多的html代码。调试困难。而且使用硬编码生成的html样式无法修改,
如果网站更换样式,那么必须得重新编码,给后期带来巨大的工作量。
因此这里采用的是第一种思路
示列代码
1.定义(template.htm)html模板页面
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<html>
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<head>
3
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<title></title>
4
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
5
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</head>
6
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<body >
7
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<table $htmlformat[0] height="100%" border="0" width="100%" cellpadding="10" cellspacing="0" bgcolor="#eeeeee" style="border:1px solid #000000">
8
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<tr>
9
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<td width="100%" valign="middle" align="left">
10
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<span style="color: $htmlformat[1];font-size: $htmlformat[2]">$htmlformat[3]</span>
11
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</td>
12
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</tr>
13
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</table>
14
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</body>
15
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</html>
2.asp.net代码:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//---------------------读html模板页面到stringbuilder对象里----
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
string[] format=new string[4];//定义和htmlyem标记数目一致的数组
3
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
StringBuilder htmltext=new StringBuilder();
4
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
try
5
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
6
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using (StreamReader sr = new StreamReader("存放模板页面的路径和页面名"))
7
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
8
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
String line;
9
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while ((line = sr.ReadLine()) != null)
10
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
11
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
htmltext.Append(line);
12
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
13
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sr.Close();
14
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
15
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
16
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
catch
17
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
18
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Response.Write("<Script>alert('读取文件错误')</Script>");
19
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
20
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//---------------------给标记数组赋值------------
21
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[0]="background=/"bg.jpg/"";//背景图片
22
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[1]= "#990099";//字体颜色
23
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[2]="150px";//字体大小
24
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
format[3]= "<marquee>生成的模板html页面</marquee>";//文字说明
25
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//----------替换htm里的标记为你想加的内容
26
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
for(int i=0;i<4;i++)
27
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
28
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
htmltext.Replace("$htmlformat["+i+"]",format[i]);
29
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
30
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//----------生成htm文件------------------――
31
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
try
32
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
33
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using(StreamWriter sw=new StreamWriter("存放路径和页面名",false,System.Text.Encoding.GetEncoding("GB2312")))
34
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
35
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.WriteLine(htmltext);
36
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Flush();
37
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Close();
38
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
39
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
40
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
41
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
catch
42
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
43
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Response.Write ("The file could not be wirte:");
44
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
小结
用此方法可以方便的生成html文件。程序使用了是循环替换,因此对需替换大量元素的模板速度非常快。
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