Asp.net regular template engine code, asp.net template engine

Asp.net regular template engine code, asp.net template engine

We declare an array

   public static Regex[] r = new Regex[23];

The following key Regular Expressions:

RegexOptions options = RegexOptions. None; // nested template tag (compatible) r [0] = new Regex (@ "<! -- {Template (skin = \ "" ([^ \ [\] \ {\} \ s] + )\\""(?: \ S + ))?) Src = (?: \/| \ "") ([^ \ [\] \ {\}\ S] + )(?: \/| \\"")(?: \ S *)} --> ", options); // template path tag (new) r [1] = new Regex (@" <! -- {Templateskin (= (?: \ "") ([^ \ [\] \{\}\ S] + )(? :\\""))?) (?: \ S *)} --> ", options); // namespace tag r [2] = new Regex (@" <! -- {Namespace (? :""?) ([\ S \ S] + ?) (? :""?)} --> ", Options); // C # code tag r [3] = new Regex (@" <! -- {Csharp} --> ([\ s \ S] + ?) <! -- {/Csharp} --> ", options); // loop (discard) r [4] = new Regex (@" <! -- {Loop (\ ([^ \ [\] \{\}\ s] + )\))?) ([^ \ [\] \{\}\ S] +) ([^ \ [\] \{\}\ s] +)} --> ", options ); // foreach loop (new) r [5] = new Regex (@ "<! -- {Foreach (?: \ S *) \ ([^ \ [\] \{\}\ s] +) ([^ \ [\] \{\}\ s] +) in ([^ \ [\] \{\}\ s] + )\)(?: \ S *)} --> ", options); // for Loop (new) r [6] = new Regex (@" <! -- {For \ ([^ \ (\) \ [\] \ {\}] + )\)(?: \ S *)} --> ", options); // if statement label (discard) r [7] = new Regex (@" <! -- {If (?: \ S *) ([^ \ s] + )((?: \ S *) (\ | \&\&)(?: \ S *) ([^ \ s] + ))?) (?: \ S *)} --> ", options); r [8] = new Regex (@" <! -- {Else (((?: \ S *) if (?: \ S *) ([^ \ s] + )((?: \ S *) (\ | \&\&)(?: \ S *) ([^ \ s] + ))*))?) (?: \ S *)} --> ", options); // if statement label (new) r [9] = new Regex (@" <! -- {If \ ([^ \ s] + )((?: \ S *) (\ | \&\&)(?: \ S *) ([^ \ s] + ))?) \)(?: \ S *)} --> ", options); r [10] = new Regex (@" <! -- {Else (((?: \ S *) if \ ([^ \ s] + )((?: \ S *) (\ | \&\&)(?: \ S *) ([^ \ s] + ))?))? \))(?: \ S *)} --> ", options); // loop and Judge end tag (compatible) r [11] = new Regex (@" <! --{\/(?: Loop | foreach | for | if )(?: \ S *)} --> ", options); // continue tag r [12] = new Regex (@" <! -- {Continue (?: \ S *)} --> "); // break tag r [13] = new Regex (@" <! -- {Break (?: \ S *)} --> "); // request tag r [14] = new Regex (@ "(\ {request \ [([^ \ [\] \ {\} \ s] +) \] \}) ", options); // capture the string tag r [15] = new Regex (@" (<! -- {Cutstring \ ([^ \ s] + ?), (. \ D *?) \)} -->) ", Options); // url link tag r [16] = new Regex (@" (<! -- {Linkurl \ ([^ \ s] *?) \)} -->) ", Options); // declare the value assignment tag (compatible) r [17] = new Regex (@" <! -- {Set ((\(? ([\ W \. <>] + )(?: \) | ))?) (?: \ S *)\{? ([^ \ S \ {\}] + )\}? (?: \ S *) = (?: \ S *)(.*?) (?: \ S *)} --> ", options ); // data variable label r [18] = new Regex (@ "(\ {([^ \ [\] \ {\} \ s] +) \ [([^ \ [\] \ {\}\ s] +) \] \}) ", options ); // common variable label r [19] = new Regex (@ "({([^ \ [\]/\{\}=: '\ s] + )}) ", options); // time format conversion tag r [20] = new Regex (@" (<! -- {Datetostr \ ([^ \ s] + ?), (.*?) \)} -->) ", Options ); // Integer Conversion label r [21] = new Regex (@ "(\ {strtoint \ ([^ \ s] + ?) \) \}) ", Options); // directly output the tag r [22] = new Regex (@" <! --{(?: Write | = )(?: \ S *)(.*?) (?: \ S *)} --> ", options );

Looking at a bunch of things! It is difficult to get regular expressions.

How can we use the following method to replace the if tag of the judgment statement?

String strTemplate = "" // the content of the template you want to replace foreach (Match m in r [7]. matches (strTemplate) {IsCodeLine = true; strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ tif (" + m. groups [1]. toString (). replace ("\" "," \ "") + ") \ r \ n \ t {");} foreach (Match m in r [8]. matches (strTemplate) {IsCodeLine = true; if (m. groups [1]. toString () = string. empty) {strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ t} \ r \ n \ telse \ r \ n \ t {");} else {strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ t} \ r \ n \ telse if (" + m. groups [3]. toString (). replace ("\" "," \ "") + ") \ r \ n \ t {") ;}} foreach (Match m in r [9]. matches (strTemplate) {IsCodeLine = true; strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ tif (" + m. groups [1]. toString (). replace ("\" "," \ "") + ") \ r \ n \ t {");} foreach (Match m in r [10]. matches (strTemplate) {IsCodeLine = true; if (m. groups [1]. toString () = string. empty) {strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ t} \ r \ n \ telse \ r \ n \ t {");} else {strTemplate = strTemplate. replace (m. groups [0]. toString (), "\ r \ n \ t} \ r \ n \ telse if (" + m. groups [3]. toString (). replace ("\" "," \ "") + ") \ r \ n \ t {");}}

Writing a template engine by yourself is troublesome. It may be easier to directly write dynamic pages and pseudo static pages. Previously, we used the velocity template engine, which is also very good.

The aspnet Regular Expression loads the content in the <body> label in the html source code.

Please refer to the following code
The url is a webpage address.
Var url = textBox1.Text;
Var wc = new WebClient ();
Var html = wc. DownloadString (url );
RichTextBox1.Text = Regex. Match (html, "<body. + </body>"). ToString ();



ASPnet uses regular expressions to extract img tags of html code

Regex r = new Regex ("] + [>] +", RegexOptions. ExplicitCapture );
String result = r. Replace (strSource ,"");