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asp下载篇(1):asp源码：ASP编写网页中所有资源的程序
ASP网免费发布asp源码：ASP编写网页中所有资源的程序，更多asp源码相关信息请访问ASP网。
看过一篇关于下载网页中图片的文章，它只能下载以http头的图片，我做了些改进，可以下载网页中的所有连接资源，并按照网页中的目录结构建立本地目录，存放资源。
download.asp?url=你要下载的网页
download.asp代码如下：
＜% Server.ScriptTimeout=9999 function SaveToFile(from,tofile) on error resume next dim geturl,objStream,imgs geturl=trim(from) Mybyval=getHTTPstr(geturl) Set objStream = Server.CreateObject("ADODB.Stream") objStream.Type =1 objStream.Open objstream.write Mybyval objstream.SaveToFile tofile,2 objstream.Close() set objstream=nothing if err.number＜＞0 then err.Clear end function
function geturlencodel(byval url)"中文文件名转换 Dim i,code geturlencodel="" if trim(Url)="" then exit function for i=1 to len(Url) code=Asc(mid(Url,i,1)) if code＜0 Then code = code + 65536 If code＞255 Then geturlencodel=geturlencodel&"%"&Left(Hex(Code),2)&"%"&Right(Hex(Code),2) else geturlencodel=geturlencodel&mid(Url,i,1) end if next end function function getHTTPPage(url) on error resume next dim http set http=Server.createobject("Msxml2.XMLHTTP") Http.open "GET",url,false Http.send() if Http.readystate＜＞4 then exit function getHTTPPage=bytes2BSTR(Http.responseBody) set http=nothing if err.number＜＞0 then err.Clear end function
Function bytes2BSTR(vIn) dim strReturn dim i,ThisCharCode,NextCharCode strReturn = "" For i = 1 To LenB(vIn) ThisCharCode = AscB(MidB(vIn,i,1)) If ThisCharCode ＜ &H80 Then strReturn = strReturn & Chr(ThisCharCode) Else NextCharCode = AscB(MidB(vIn,i+1,1)) strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode)) i = i + 1 End If Next bytes2BSTR = strReturn End Function
function getFileName(byval filename) if instr(filename,"/")＞0 then fileExt_a=split(filename,"/") getFileName=lcase(fileExt_a(ubound(fileExt_a))) if instr(getFileName,"?")＞0 then getFileName=left(getFileName,instr(getFileName,"?")-1) end if else getFileName=filename end if end function
function getHTTPstr(url) on error resume next dim http set http=server.createobject("MSXML2.XMLHTTP") Http.open "GET",url,false Http.send() if Http.readystate＜＞4 then exit function getHTTPstr=Http.responseBody set http=nothing if err.number＜＞0 then err.Clear end function
Function CreateDIR(ByVal LocalPath) "建立目录的程序，如果有多级目录，则一级一级的创建 On Error Resume Next LocalPath = Replace(LocalPath, "\", "/") Set FileObject = server.CreateObject("Scripting.FileSystemObject") patharr = Split(LocalPath, "/") path_level = UBound(patharr) For I = 0 To path_level If I = 0 Then pathtmp = patharr(0) & "/" Else pathtmp = pathtmp & patharr(I) & "/" cpath = Left(pathtmp, Len(pathtmp) - 1) If Not FileObject.FolderExists(cpath) Then FileObject.CreateFolder cpath Next Set FileObject = Nothing If Err.Number ＜＞ 0 Then CreateDIR = False Err.Clear Else CreateDIR = True End If End Function
function GetfileExt(byval filename) fileExt_a=split(filename,".") GetfileExt=lcase(fileExt_a(ubound(fileExt_a))) end function
function getvirtual(str,path,urlhead) if left(str,7)="http://" then url=str elseif left(str,1)="/" then start=instrRev(str,"/") if start=1 then url="/" else url=left(str,start) end if url=urlhead&url elseif left(str,3)="../" then str1=mid(str,inStrRev(str,"../")+2) ar=split(str,"../") lv=ubound(ar)+1 ar=split(path,"/") url="/" for i=1 to (ubound(ar)-lv) url=url&ar(i) next url=url&str1 url=urlhead&url else url=urlhead&str end if getvirtual=url end function "示例代码 dim dlpath
virtual="/downweb/" truepath=server.MapPath(virtual) if request("url")＜＞ "" then url=request("url") fn=getFileName(url) urlhead=left(url,(instr(replace(url,"//",""),"/")+1)) urlpath=replace(left(url,instrRev(url,"/")),urlhead,"") strContent = getHTTPPage(url) mystr=strContent Set objRegExp = New Regexp objRegExp.IgnoreCase = True objRegExp.Global = True objRegExp.Pattern = "(src|href)=.[^\＞]+? " Set Matches =objRegExp.Execute(strContent) For Each Match in Matches str=Match.Value str=replace(str,"src=","") str=replace(str,"href=","") str=replace(str,"""","") str=replace(str,""","") filename=GetfileName(str) getRet=getVirtual(str,urlpath,urlhead) temp=Replace(getRet,"//","**") start=instr(temp,"/") endt=instrRev(temp,"/")-start+1 if start＞0 then repl=virtual&mid(temp,start)&" " "response.Write repl&"＜br＞" mystr=Replace(mystr,str,repl)
dir=mid(temp,start,endt) temp=truepath&Replace(dir,"/","\") CreateDir(temp) "response.Write getRet&"||"&temp&filename&"＜br＞＜br＞" SaveToFile getRet,temp&filename end if Next set Matches=nothing end if
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asp下载篇(2):asp教程：ASP编写网页中所有资源的原代码
ASP网免费发布asp教程：ASP编写网页中所有资源的原代码，更多asp教程相关信息请访问ASP网。
看过一篇关于下载网页中图片的文章，它只能下载以http头的图片，我做了些改进，可以下载网页中的所有连接资源，并按照网页中的目录结构建立本地目录，存放资源。
download.asp?url=你要下载的网页
download.asp代码如下：
＜% Server.ScriptTimeout=9999 function SaveToFile(from,tofile) on error resume next dim geturl,objStream,imgs geturl=trim(from) Mybyval=getHTTPstr(geturl) Set objStream = Server.CreateObject("ADODB.Stream") objStream.Type =1 objStream.Open objstream.write Mybyval objstream.SaveToFile tofile,2 objstream.Close() set objstream=nothing if err.number＜＞0 then err.Clear end function
function geturlencodel(byval url)"中文文件名转换 Dim i,code geturlencodel="" if trim(Url)="" then exit function for i=1 to len(Url) code=Asc(mid(Url,i,1)) if code＜0 Then code = code + 65536 If code＞255 Then geturlencodel=geturlencodel&"%"&Left(Hex(Code),2)&"%"&Right(Hex(Code),2) else geturlencodel=geturlencodel&mid(Url,i,1) end if next end function function getHTTPPage(url) on error resume next dim http set http=Server.createobject("Msxml2.XMLHTTP") Http.open "GET",url,false Http.send() if Http.readystate＜＞4 then exit function getHTTPPage=bytes2BSTR(Http.responseBody) set http=nothing if err.number＜＞0 then err.Clear end function
Function bytes2BSTR(vIn) dim strReturn dim i,ThisCharCode,NextCharCode strReturn = "" For i = 1 To LenB(vIn) ThisCharCode = AscB(MidB(vIn,i,1)) If ThisCharCode ＜ &H80 Then strReturn = strReturn & Chr(ThisCharCode) Else NextCharCode = AscB(MidB(vIn,i+1,1)) strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode)) i = i + 1 End If Next bytes2BSTR = strReturn End Function
function getFileName(byval filename) if instr(filename,"/")＞0 then fileExt_a=split(filename,"/") getFileName=lcase(fileExt_a(ubound(fileExt_a))) if instr(getFileName,"?")＞0 then getFileName=left(getFileName,instr(getFileName,"?")-1) end if else getFileName=filename end if end function
function getHTTPstr(url) on error resume next dim http set http=server.createobject("MSXML2.XMLHTTP") Http.open "GET",url,false Http.send() if Http.readystate＜＞4 then exit function getHTTPstr=Http.responseBody set http=nothing if err.number＜＞0 then err.Clear end function
Function CreateDIR(ByVal LocalPath) "建立目录的程序，如果有多级目录，则一级一级的创建 On Error Resume Next LocalPath = Replace(LocalPath, "\", "/") Set FileObject = server.CreateObject("Scripting.FileSystemObject") patharr = Split(LocalPath, "/") path_level = UBound(patharr) For I = 0 To path_level If I = 0 Then pathtmp = patharr(0) & "/" Else pathtmp = pathtmp & patharr(I) & "/" cpath = Left(pathtmp, Len(pathtmp) - 1) If Not FileObject.FolderExists(cpath) Then FileObject.CreateFolder cpath Next Set FileObject = Nothing If Err.Number ＜＞ 0 Then CreateDIR = False Err.Clear Else CreateDIR = True End If End Function
function GetfileExt(byval filename) fileExt_a=split(filename,".") GetfileExt=lcase(fileExt_a(ubound(fileExt_a))) end function
function getvirtual(str,path,urlhead) if left(str,7)="http://" then url=str elseif left(str,1)="/" then start=instrRev(str,"/") if start=1 then url="/" else url=left(str,start) end if url=urlhead&url elseif left(str,3)="../" then str1=mid(str,inStrRev(str,"../")+2) ar=split(str,"../") lv=ubound(ar)+1 ar=split(path,"/") url="/" for i=1 to (ubound(ar)-lv) url=url&ar(i) next url=url&str1 url=urlhead&url else url=urlhead&str end if getvirtual=url end function "示例代码 dim dlpath
virtual="/downweb/" truepath=server.MapPath(virtual) if request("url")＜＞ "" then url=request("url") fn=getFileName(url) urlhead=left(url,(instr(replace(url,"//",""),"/")+1)) urlpath=replace(left(url,instrRev(url,"/")),urlhead,"") strContent = getHTTPPage(url) mystr=strContent Set objRegExp = New Regexp objRegExp.IgnoreCase = True objRegExp.Global = True objRegExp.Pattern = "(src|href)=.[^\＞]+? " Set Matches =objRegExp.Execute(strContent) For Each Match in Matches str=Match.Value str=replace(str,"src=","") str=replace(str,"href=","") str=replace(str,"""","") str=replace(str,""","") filename=GetfileName(str) getRet=getVirtual(str,urlpath,urlhead) temp=Replace(getRet,"//","**") start=instr(temp,"/") endt=instrRev(temp,"/")-start+1 if start＞0 then repl=virtual&mid(temp,start)&" " "response.Write repl&"＜br＞" mystr=Replace(mystr,str,repl)
dir=mid(temp,start,endt) temp=truepath&Replace(dir,"/","\") CreateDir(temp) "response.Write getRet&"||"&temp&filename&"＜br＞＜br＞" SaveToFile getRet,temp&filename end if Next set Matches=nothing end if
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asp下载篇(3):asp.net源码:ASP.NET数据绑定代码
.NET网免费发布asp.net源码:ASP.NET数据绑定代码，更多asp.net源码:ASP.NET数据绑定代码相关信息请访问ASP.NET网。
数据绑定似乎是ASP.NET老掉牙的东西了。可是你知道吗，只需要一点小小的改动就可以替换Eval，摆脱字符串依赖并且大大提高性能。
首先在code behind中加入以下方法
protected virtual object ExpHelper<TEntity, TREsult>(Func<TEntity, TREsult> func){ var itm =GetDataItem(); return func((TEntity)itm);}这段代码就是最核心的秘诀了，你完全可以忽视它到底在做什么。其实就是截获每一个被绑定的数据项，并进行强类型转换。
假设我们定义了学生类
public class Student{ public string Name { get; set; } public int Age { get; set; }}如果希望在页面中使用强类型访问学生类而不是用Eval，定义专门访问学生的方法
protected object Stu<TResult>(Func<Student, TResult> func){ return ExpHelper<Student, TResult>(func);}大功告成，于是在页面里我们就能这样绑定数据了
<ul><asp:Repeater ID="rptStudents" runat="server"><ItemTemplate> <li><%#Stu(_=>_.Name + "(" +_.Age+")")%></li></ItemTemplate></asp:Repeater></ul>这样做有四大优势
得到编译时检测
享受智能提示
强类型转换比Eval反射性能更高
页面中的表示更丰富，如上我们可以自由拼接想要的字符串，非常像MVC
更神奇的是可以支持多层嵌套哦。比如我们定义学生的集合Group类和访问器，然后就能用嵌套的Repeater显示分组信息了。完整程序如下
<%@ Page Language="C#" AutoEventWireup="true"%><script runat="server"> public class Student { public string Name { get; set; } public int Age { get; set; } } public class Group { public IEnumerable<Student> Students { get; set; } } protected void Page_Load(object sender, EventArgs e) { //一群学生 var students = new[] { new Student{Name="mike",Age=23}, new Student{Name="jane", Age=12}, new Student{Name="frank",Age=25}, new Student{Name="susan",Age=32}, }; rptStudents.DataSource = students; //分两组 var group0 = new Group(); group0.Students = students.Take(2); var group1 = new Group(); group1.Students = students.Skip(2).Take(2); rptGroups.DataSource = new[] { group0, group1 }; DataBind(); } protected virtual object ExpHelper<TEntity, TREsult>(Func<TEntity, TREsult> func) { var itm = GetDataItem(); return func((TEntity)itm); } //Student访问器 protected object Stu<TResult>(Func<Student, TResult> func) { return ExpHelper<Student, TResult>(func); } //Group访问器 protected object Grp<TResult>(Func<Group, TResult> func) { return ExpHelper<Group, TResult>(func); }</script><!DOCTYPE html><html><body> <%--单层--%> <ul> <asp:Repeater ID="rptStudents" runat="server"> <ItemTemplate> <li><%#Stu(_=>_.Name + "(" +_.Age+")")%></li> </ItemTemplate> </asp:Repeater> </ul> <%--嵌套--%> <ul> <asp:Repeater ID="rptGroups" runat="server"> <ItemTemplate> <li> <ol> <asp:Repeater ID="Repeater1" runat="server" DataSource="<%#Grp(_=>_.Students) %>"> <ItemTemplate> <li><%#Stu(_=>_.Name + "(" +_.Age+")")%></li> </ItemTemplate> </asp:Repeater> </ol> </li> </ItemTemplate> </asp:Repeater> </ul></body></html>PS
本文是我以前写的没有发表的小发明，现在拿出来晒，主要是因为这个方法好像知道的人很少。希望大家能帮助测试一下性能，如果觉得合适大可以运用到实际工作中。
更新：
感谢Dacey 韦恩卑鄙 dudu老大等人的建议
我已添加了扩展方法版本。喜欢扩展方法这种空降兵的感觉。
现在只要添加一个static的帮助类，名字随你喜欢
public static class Helper{ static object ExpHelper<TEntity, TResult>(Page page, Func<TEntity, TResult> func) { var itm = page.GetDataItem(); return func((TEntity)itm); } public static object Eval<T>(this Page page, Func<T, object> func) { return ExpHelper<T, object>(page, func); }}在页面中就可以
<%#this.Eval<Student>(_ => _.Name + "(" + _.Age + ")")%>注意this是必须的
扩展方法具有很好的粘合性
不需要一个父类定义通用方法
泛型提供多个副本并且容易看清类型
另外能很好的支持refactor，大家试试用ctrl+r+r改属性名
本文来源：http://www.zhuodaoren.com/shenghuo785145/
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