• 处理HTML代码的若干函数


    经过了上个星期的努力学习,对处理html又有了新的发现
    感觉真的很不错
    可以说js的威力在处理html代码方面我又有所领悟了
    1、截取特定长度字符串

        Public Shared Function CutString1(ByVal str As StringByVal length As IntegerAs String


            
    Dim i As Integer = 0
            
    Dim j As Integer = 0
            
    For Each chr As Char In str
                
    If Asc(chr> 127 Then
                    i 
    = i + 2
                
    Else
                    i 
    += 1
                    
    If (i > length) Then
                        
    str = str.Substring(0, j) + ""
                        
    Exit For
                    
    End If
                
    End If
                j 
    += 1
            
    Next
            
    Return str

        
    End Function
    2、在在textarea(textbox里面的textmode为dul),对其输入的字符转换成html格式
    Public Function HtmlEncode(ByVal str As StringAs String
            
    Dim L As Integer
            
    Dim result As String
            
    If str = "" Then
                
    Return ""
            
    End If
            L 
    = Len(str)
            
    Dim i As Integer
            
    For i = 1 To L
                
    Select Case Mid(str, i, 1)
                    
    Case Chr(13)
                        result 
    = result + "<br>"
                    
    Case Chr(34)
                        result 
    = result + "&quot;"
                    
    Case Chr(32)
                        
    'result=result+"&nbsp;"
                        If i + 1 <= L And i - 1 > 0 Then
                            
    If Mid(str, i + 11= Chr(32Or Mid(str, i + 11= Chr(9Or Mid(str, i - 11= Chr(32Or Mid(str, i - 11= Chr(9Then
                                result 
    = result + "&nbsp;"
                            
    Else
                                result 
    = result + " "
                            
    End If
                        
    Else
                            result 
    = result + "&nbsp;"
                        
    End If
                    
    Case Chr(9)
                        result 
    = result + "    "
                    
    Case Else
                        result 
    = result + Mid(str, i, 1)
                
    End Select
            
    Next
            
    Return result
        
    End Function

    3、在textarea(textbox里面的textmode为dul),对其输入的字符转换成html格式输出
        Public Shared Function StripHTML(ByVal strHtml As StringAs String
            
    Dim aryReg() As String = New String() {"<script[^>]*?>.*?</script>""<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>""([\r\n])[\s]+""&(quot|#34);""&(amp|#38);""&(lt|#60);""&(gt|#62);""&(nbsp|#160);""&(iexcl|#161);""&(cent|#162);""&(pound|#163);""&(copy|#169);""&#(\d+);""-->""<!--.*\n"}

            
    Dim aryRep() As String = {"""""""""""&"""""" ""\xa1"Chr(161), "\xa2"Chr(162), "\xa3"Chr(163), "\xa9"Chr(169), """\r\n"""}





            
    Dim NewReg As String = aryReg(0)
            
    Dim strOutput As String = strHtml
            
    Dim i As Integer
            
    For i = 0 To aryReg.Length - 1 Step i + 1
                
    Dim regex As Regex = New Regex(aryReg(i), RegexOptions.IgnoreCase)
                strOutput 
    = regex.Replace(strOutput, aryRep(i))
            
    Next

            strOutput.Replace(
    "<""")
            strOutput.Replace(
    ">""")
            strOutput.Replace(
    "\r\n""")


            
    Return strOutput
        
    End Function
    4、一个plus js代码,作用是把所有的tooltip格式化后转变一个层,特定输出(效果见http://www.lostfound.cn)
    var pltsPop=null;
    var pltsoffsetX = 10;
    var pltsoffsetY = 15;
    var pltsPopbg="#ffff00";
    var pltsPopfg="#111111";
    var pltsTitle="";
    document.write('
    <div id=pltsTipLayer style="display: none;position: absolute; z-index:10001"></div>');
    function pltsinits()
    {
        document.onmouseover   
    = plts;
        document.onmousemove 
    = moveToMouseLoc;
    }

    function plts()
    {  var o=event.srcElement;
        
    if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
        
    if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
        pltsPop
    =o.dypop;
        
    if(pltsPop!=null&&pltsPop!=""&&typeof(pltsPop)!="undefined")
        
    {
    pltsTipLayer.style.left
    =-1000;
    pltsTipLayer.style.display
    ='';
    var Msg=pltsPop.replace(/\n/g,"<br>");
    Msg
    =Msg.replace(/\0x13/g,"<br>");
    var re=/\{(.[^\{]*)\}/ig;
    if(!re.test(Msg))pltsTitle="[MyTopWin.Com] 拓文CMS ASP.net系统";
    else{
       re
    =/\{(.[^\{]*)\}(.*)/ig;
         pltsTitle
    =Msg.replace(re,"$1")+"&nbsp;";
       re
    =/\{(.[^\{]*)\}/ig;
       Msg
    =Msg.replace(re,"");
       Msg
    =Msg.replace("<br>","");}

      
            
    var content =
           '
    <table style="FILTER:alpha(opacity=90) shadow(color=#bbbbbb,direction=150);" id=toolTipTalbe border=0><tr><td width="100%"><table class=selet_bg cellspacing="0" cellpadding="0" style="100%" style="font size:11px;">'+
           '
    <tr id=pltsPoptop><th height=12 valign=bottom class=header><p id=topleft align=left>↖'+pltsTitle+'</p><p id=topright align=right style="display:none">'+pltsTitle+'↗</font></th></tr>'+
           '
    <tr><td style="padding-left:10px;padding-right:10px;padding-top: 4px;padding-bottom:4px;line-height:135%">'+Msg+'</td></tr>'+
           '
    <tr id=pltsPopbot style="display:none"><th height=12 valign=bottom class=header><p id=botleft align=left>↙'+pltsTitle+'</p><p id=botright align=right style="display:none">'+pltsTitle+'↘</font></th></tr>'+
           '
    </table></td></tr></table>';
            pltsTipLayer.innerHTML
    =content;
            toolTipTalbe.style.width
    =Math.min(pltsTipLayer.clientWidth,document.body.clientWidth/2.2);
            moveToMouseLoc();
            
    return true;
           }

        
    else
        
    {
         pltsTipLayer.innerHTML
    ='';
           pltsTipLayer.style.display
    ='none';
            
    return true;
        }

    }


    function moveToMouseLoc()
    {
    if(pltsTipLayer.innerHTML=='')return true;
    var MouseX=event.x;
    var MouseY=event.y;
    //window.status=event.y;
    var popHeight=pltsTipLayer.clientHeight;
    var popWidth=pltsTipLayer.clientWidth;
    if(MouseY+pltsoffsetY+popHeight>document.body.clientHeight)
    {
        popTopAdjust
    =-popHeight-pltsoffsetY*1.5;
        pltsPoptop.style.display
    ="none";
        pltsPopbot.style.display
    ="";
    }

      
    else
    {
         popTopAdjust
    =0;
        pltsPoptop.style.display
    ="";
        pltsPopbot.style.display
    ="none";
    }

    if(MouseX+pltsoffsetX+popWidth>document.body.clientWidth)
    {
      popLeftAdjust
    =-popWidth-pltsoffsetX*2;
      topleft.style.display
    ="none";
      botleft.style.display
    ="none";
      topright.style.display
    ="";
      botright.style.display
    ="";
    }

    else
    {
      popLeftAdjust
    =0;
      topleft.style.display
    ="";
      botleft.style.display
    ="";
      topright.style.display
    ="none";
      botright.style.display
    ="none";
    }

    pltsTipLayer.style.left
    =MouseX+pltsoffsetX+document.body.scrollLeft+popLeftAdjust;
    pltsTipLayer.style.top
    =MouseY+pltsoffsetY+document.body.scrollTop+popTopAdjust;
       
    return true;
    }

    pltsinits();
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  • 原文地址:https://www.cnblogs.com/xucanzhao/p/411465.html
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