This post originated from an RSS feed registered with .NET Buzz by Adrian Florea. Original Post: Le magie di XslCompiledTransform Feed Title: Web Log di Adrian Florea Feed URL: /error.aspx?aspxerrorpath=/adrian/Rss.aspx Feed Description: "You know you've achieved perfection in design, not when you have nothing more to add, but when you have nothing more to take away." Antoine de Saint-Exupery Latest .NET Buzz Posts Latest .NET Buzz Posts by Adrian Florea Latest Posts From Web Log di Adrian Florea

Appena ho visto la nuova XslCompiledTransform (in 2.0) è stato colpo di fulmine. E da questo esempietto fatto al volo, solo per rendere l'idea, capirete subito perché:

using System;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Xsl;
 
class Test
{
      static void Main()
      {
            string methodName = "Foo";
            StringBuilder methodCode = new StringBuilder();
 
            methodCode.AppendLine  ("// ritorna la stringa Ciao ragazzi!");
            methodCode.AppendFormat("public string {0}()", methodName);
            methodCode.AppendLine  ("{");
            methodCode.AppendLine  ("   StringBuilder sb = new StringBuilder();");
            methodCode.AppendLine  ("   sb.Append(\"Ciao \");");
            methodCode.AppendLine  ("   sb.Append(\"ragazzi!\");");
            methodCode.AppendLine  ("   return sb.ToString();");
            methodCode.AppendLine  ("}");
 
            Console.WriteLine(ExecuteMethodCode(methodCode.ToString(), methodName));
      }
 
      static string ExecuteMethodCode(string methodCode, string methodName)
      {
            StringBuilder xsl = new StringBuilder();
            StringBuilder result = new StringBuilder();
 
            string prefix = "my-prefix";
            string urn = "my-urn";
 
            xsl.AppendLine("");
            xsl.AppendLine(");
            xsl.AppendLine("xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\"");
            xsl.AppendLine("xmlns:msxsl=\"urn:schemas-microsoft-com:xslt\"");
            xsl.AppendFormat("xmlns:{0}=\"urn:{1}\">", prefix, urn);
            xsl.AppendFormat("", prefix);
            xsl.AppendFormat("", methodCode);
            xsl.AppendLine("");
            xsl.AppendLine("");
            xsl.AppendFormat("", prefix, methodName);
            xsl.AppendLine("");
            xsl.AppendLine("");
 
            XmlDocument dummyXml = new XmlDocument();
            dummyXml.CreateXmlDeclaration("1.0", null, null);
            dummyXml.CreateElement(new Guid().ToString());
 
            XmlReader reader = XmlReader.Create(new StringReader(xsl.ToString()));
            XmlTextWriter writer = new XmlTextWriter(new StringWriter(result));
 
            XslCompiledTransform compiledXsl = new XslCompiledTransform();
            compiledXsl.Load(reader, XsltSettings.TrustedXslt, null);
            compiledXsl.Transform(dummyXml, writer);
 
            return result.ToString();
      }
}

Cosa stampa a console? Ciao ragazzi! naturalmente... Bellissimo!