Export (0) Print
Expand All

CodeDomProvider.GenerateCodeFromMember Method

Generates code for the specified Code Document Object Model (CodeDOM) member declaration and sends it to the specified text writer, using the specified options.

Namespace:  System.CodeDom.Compiler
Assembly:  System (in System.dll)

public virtual void GenerateCodeFromMember(
	CodeTypeMember member,
	TextWriter writer,
	CodeGeneratorOptions options
)

Parameters

member
Type: System.CodeDom.CodeTypeMember

A CodeTypeMember object that indicates the member for which to generate code.

writer
Type: System.IO.TextWriter

The TextWriter to which output code is sent.

options
Type: System.CodeDom.Compiler.CodeGeneratorOptions

A CodeGeneratorOptions that indicates the options to use for generating code.

ExceptionCondition
NotImplementedException

This method is not overridden in a derived class.

The base class implementation throws a NotImplementedException. See CSharpCodeProvider.GenerateCodeFromMember for documentation describing an implementation of this method.

The following code example shows the use of the GenerateCodeFromMember method as implemented by the CSharpCodeProvider and VBCodeProvider classes.

using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.IO;
using System.Text.RegularExpressions;

namespace BasicCodeDomApp
{
    class Program
    {
        static string providerName = "cs";
        static string sourceFileName = "test.cs";
        static CodeSnippetTypeMember snippetMethod;
        static void Main(string[] args)
        {
            CodeDomProvider provider = CodeDomProvider.CreateProvider(providerName);

            // Create a code snippet to be used in the graph.
            GenCodeFromMember(provider, new CodeGeneratorOptions());

            LogMessage("Building CodeDOM graph...");

            CodeCompileUnit cu = new CodeCompileUnit();

            cu = BuildClass1();

            StringWriter sw = new StringWriter();

            LogMessage("Generating code...");
            provider.GenerateCodeFromCompileUnit(cu, sw, null);

            string output = sw.ToString();

            LogMessage("Dumping source...");
            LogMessage(output);

            LogMessage("Writing source to file...");
            Stream s = File.Open(sourceFileName, FileMode.Create);
            StreamWriter t = new StreamWriter(s);
            t.Write(output);
            t.Close();
            s.Close();

            CompilerParameters opt = new CompilerParameters(new string[]{
                                      "System.dll" });
            opt.GenerateExecutable = false;
            opt.OutputAssembly = "Sample.dll";

            CompilerResults results;

            LogMessage("Compiling with " + providerName);
            results = provider.CompileAssemblyFromFile(opt, sourceFileName);

            OutputResults(results);
            if (results.NativeCompilerReturnValue != 0)
            {
                LogMessage("");
                LogMessage("Compilation failed.");
            }
            else
            {
                LogMessage("");
                LogMessage("Demo completed successfully.");
            }
            File.Delete(sourceFileName);
        }

        // Build a library program graph using  
        // System.CodeDom types. 
        public static CodeCompileUnit BuildClass1()
        {
            // Create a new CodeCompileUnit to contain  
            // the program graph.
            CodeCompileUnit compileUnit = new CodeCompileUnit();

            // Declare a new namespace called Samples.
            CodeNamespace samples = new CodeNamespace("Samples");
            // Add the new namespace to the compile unit.
            compileUnit.Namespaces.Add(samples);

            // Add the new namespace import for the System namespace.
            samples.Imports.Add(new CodeNamespaceImport("System"));

            // Declare a new type called Class1.
            CodeTypeDeclaration class1 = new CodeTypeDeclaration("Class1");

            // Add the new type to the namespace type collection.
            samples.Types.Add(class1);

            class1.Members.Add(snippetMethod);

            return compileUnit;
        }
        static void LogMessage(string text)
        {
            Console.WriteLine(text);
        }

        static void OutputResults(CompilerResults results)
        {
            LogMessage("NativeCompilerReturnValue=" +
                results.NativeCompilerReturnValue.ToString());
            foreach (string s in results.Output)
            {
                LogMessage(s);
            }
        }
        static void GenCodeFromMember(CodeDomProvider provider, CodeGeneratorOptions options)
        {
            options.BracingStyle = "C";
            CodeMemberMethod method1 = new CodeMemberMethod();
            method1.Name = "ReturnString";
            method1.Attributes = MemberAttributes.Public;
            method1.ReturnType = new CodeTypeReference("System.String");
            method1.Parameters.Add(new CodeParameterDeclarationExpression("System.String", "text"));
            method1.Statements.Add(new CodeMethodReturnStatement(new CodeArgumentReferenceExpression("text")));
            StringWriter sw = new StringWriter();
            provider.GenerateCodeFromMember(method1, sw, options);
            snippetMethod = new CodeSnippetTypeMember(sw.ToString());
        }

    }
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft