Codedom, DOT NET Programming

What is CodeDom

The "CodeDom" is an object model that represents actually a source code. It is designed for language independent - once you create a "CodeDom" hierarchy for a program we can then generate the source code in any .NET language. So let's try to do some real practical and simple to just get a feel of how powerful "CodeDom" is.

We will try to generate the following code shown below. The below code which will be generated does not do any special thing by just displays a hello message and waits for the key to be clicked.

namespace InterviewQuestions

{

using System;

public class EntryPoint

{

public static void Main()

{

System.Console.WriteLine("Hello from Interview Question series");

System.Console.ReadLine();

}

}

}

The "Codedom" folder at the CD has one "GenerateCode" method that returns "CodeCompileUnit" object. The "CodeDom" is nothing but a full DOM model where every object in the structure shows a code unit. I have put some comments on the code so that the code is self understandable. I have put some comment at the code below so that readers can follow what is exactly happening. When you click the button it generates the "MyCode.cs" and also compiles the "Mycode.exe" in the "bin" folder.

private CodeCompileUnit GenerateCode()

{

// Definition of the Main method which will be entry point

CodeEntryPointMethod objMainMethod = new CodeEntryPointMethod();

objMainMethod.Name = "Main";

// generate this expression: Console

CodeTypeReferenceExpression consoleType = new CodeTypeReferenceExpression();

consoleType.Type = new CodeTypeReference(typeof(Console));

// Set up the argument list to pass to Console.WriteLine()

CodeExpression[] writeLineArgs = new CodeExpression[1];

CodePrimitiveExpression arg0 = new CodePrimitiveExpression("Hello from Interview

Question series");

writeLineArgs[0] = arg0;

// generate this statement: Console.WriteLine(message)

CodeMethodReferenceExpression writeLineRef = new

CodeMethodReferenceExpression(consoleType, "WriteLine");

CodeMethodInvokeExpression writeLine = new

CodeMethodInvokeExpression(writeLineRef, writeLineArgs);

// generate this statement: Console.ReadLine()

CodeMethodReferenceExpression readLineRef = new

CodeMethodReferenceExpression(consoleType, "ReadLine");

CodeMethodInvokeExpression readLine = new

CodeMethodInvokeExpression(readLineRef);

// Add Main() method to a class

CodeTypeDeclaration theClass = new CodeTypeDeclaration();

theClass.Members.Add(objMainMethod);

theClass.Name = "EntryPoint";

// Add both the code of WriteLine and Readline

objMainMethod.Statements.Add(writeLine);

objMainMethod.Statements.Add(readLine);

// Add namespace and add class

CodeNamespace ns = new CodeNamespace("InterviewQuestions");

ns.Imports.Add(new CodeNamespaceImport("System"));

ns.Types.Add(theClass);

// Generate the Compile Unit

CodeCompileUnit unit = new CodeCompileUnit();

unit.Namespaces.Add(ns);

Posted Date: 9/21/2012 7:18:27 AM | Location : United States







Related Discussions:- Codedom, Assignment Help, Ask Question on Codedom, Get Answer, Expert's Help, Codedom Discussions

Write discussion on Codedom
Your posts are moderated
Related Questions
Net project Project Description: We want to make .net project Microsoft Active Directory, PMS Lync 2010 - 2013 databases creating a license key for their SW generati

Why isn''t there an allowed amount for nonfacility for code 27405?

Show the code for the file dependency in cache? Partial Class Default_aspx Public Sub displayAnnouncement() Dim announcement As String If Cache("announcement") Is Noth

Ask queyuyuystion #Minimum 100 words accepted#

Finding Maximum & Minimum Numbers - C# Program I am facing some problems in the code for Finding Maximum & Minimum Numbers. Can anybody suggest me the proper code for it.

What are LeaseTime, Sponsorship Time, Renew on Call Time and Lease Manager Poll Time? In the normal .NET environment objects lifetime is managed by garbage collector. But inrem

How can we connect to Microsoft Access, Foxpro , Oracle etc ? The Microsoft provides System.Data.OleDb namespace to communicate with the databases such as Oracle, scess  etc. I

What are benefits and Limitation of using Viewstate for state management The benefits of using Viewstate are as follows:- 1)    There is no server resources required because

They are triggered in the following order as shown below: Application_BeginRequest Application_AuthenticateRequest Application_AuthorizeRequest Application_ResolveReque

How to clear a datagrid on a button click? You require to Clear the DataSource of the dadaGrid. So try this: dataSet1.Clear(); dataGrid1.DataSource = dataSet1.TableNam