CodeDomProvider.GenerateCodeFromMember(CodeTypeMember, TextWriter, CodeGeneratorOptions) Method

Definition

Generiert Code für die angegebene CodeDOM-Memberdeklaration (Code Document Object Model) und sendet diesen mit den angegebenen Optionen an den angegebenen Textwriter.Generates code for the specified Code Document Object Model (CodeDOM) member declaration and sends it to the specified text writer, using the specified options.

public:
 virtual void GenerateCodeFromMember(System::CodeDom::CodeTypeMember ^ member, System::IO::TextWriter ^ writer, System::CodeDom::Compiler::CodeGeneratorOptions ^ options);
public virtual void GenerateCodeFromMember (System.CodeDom.CodeTypeMember member, System.IO.TextWriter writer, System.CodeDom.Compiler.CodeGeneratorOptions options);
abstract member GenerateCodeFromMember : System.CodeDom.CodeTypeMember * System.IO.TextWriter * System.CodeDom.Compiler.CodeGeneratorOptions -> unit
override this.GenerateCodeFromMember : System.CodeDom.CodeTypeMember * System.IO.TextWriter * System.CodeDom.Compiler.CodeGeneratorOptions -> unit
Public Overridable Sub GenerateCodeFromMember (member As CodeTypeMember, writer As TextWriter, options As CodeGeneratorOptions)

Parameters

member
CodeTypeMember

Ein CodeTypeMember, der den Member angibt, für den Code generiert werden soll.A CodeTypeMember object that indicates the member for which to generate code.

writer
TextWriter

Der TextWriter, an den der Ausgabecode gesendet wird.The TextWriter to which output code is sent.

options
CodeGeneratorOptions

Ein CodeGeneratorOptions, das die Optionen angibt, die für das Generieren von Code verwendet werden sollen.A CodeGeneratorOptions that indicates the options to use for generating code.

Exceptions

Diese Methode wird in einer abgeleiteten Klasse nicht überschrieben.This method is not overridden in a derived class.

Examples

Im folgenden Codebeispiel wird die Verwendung der GenerateCodeFromMember-Methode veranschaulicht, die von den Klassen CSharpCodeProvider und VBCodeProvider implementiert wird.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());
        }
    }
}
Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.IO
Imports System.Text.RegularExpressions



Class Program
    Private Shared providerName As String = "vb"
    Private Shared sourceFileName As String = "test.vb"
    Private Shared snippetMethod As CodeSnippetTypeMember
    
    Shared Sub Main(ByVal args() As String) 
        Dim provider As CodeDomProvider = CodeDomProvider.CreateProvider(providerName)
        
        ' Create a code snippet to be used in the graph.
        GenCodeFromMember(provider, New CodeGeneratorOptions())
        
        LogMessage("Building CodeDOM graph...")
        
        Dim cu As New CodeCompileUnit()
        
        cu = BuildClass1()
        
        Dim sw As New StringWriter()
        
        LogMessage("Generating code...")
        provider.GenerateCodeFromCompileUnit(cu, sw, Nothing)
        
        Dim output As String = sw.ToString()
        
        LogMessage("Dumping source...")
        LogMessage(output)
        
        LogMessage("Writing source to file...")
        Dim s As Stream = File.Open(sourceFileName, FileMode.Create)
        Dim t As New StreamWriter(s)
        t.Write(output)
        t.Close()
        s.Close()
        
        Dim opt As New CompilerParameters(New String() {"System.dll"})
        opt.GenerateExecutable = False
        opt.OutputAssembly = "Sample.dll"
        
        Dim results As CompilerResults
        
        LogMessage(("Compiling with " + providerName))
        results = provider.CompileAssemblyFromFile(opt, sourceFileName)
        
        OutputResults(results)
        If results.NativeCompilerReturnValue <> 0 Then
            LogMessage("")
            LogMessage("Compilation failed.")
        Else
            LogMessage("")
            LogMessage("Demo completed successfully.")
        End If
        File.Delete(sourceFileName)
    
    End Sub
    
    
    ' Build a library program graph using 
    ' System.CodeDom types.
    Public Shared Function BuildClass1() As CodeCompileUnit 
        ' Create a new CodeCompileUnit to contain 
        ' the program graph.
        Dim compileUnit As New CodeCompileUnit()
        
        ' Declare a new namespace called Samples.
        Dim samples As 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.
        Dim class1 As New CodeTypeDeclaration("Class1")
        
        ' Add the new type to the namespace type collection.
        samples.Types.Add(class1)
        
        class1.Members.Add(snippetMethod)
        
        Return compileUnit
    
    End Function 'BuildClass1
    
    Shared Sub LogMessage(ByVal [text] As String) 
        Console.WriteLine([text])
    
    End Sub
    
    
    Shared Sub OutputResults(ByVal results As CompilerResults) 
        LogMessage(("NativeCompilerReturnValue=" + results.NativeCompilerReturnValue.ToString()))
        Dim s As String
        For Each s In  results.Output
            LogMessage(s)
        Next s
    
    End Sub
    
    Shared Sub GenCodeFromMember(ByVal provider As CodeDomProvider, ByVal options As CodeGeneratorOptions) 
        options.BracingStyle = "C"
        Dim method1 As 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")))
        Dim sw As New StringWriter()
        provider.GenerateCodeFromMember(method1, sw, options)
        snippetMethod = New CodeSnippetTypeMember(sw.ToString())
    
    End Sub
End Class

Remarks

Die Basisklassen Implementierung löst eine NotImplementedExceptionaus.The base class implementation throws a NotImplementedException. Unter CSharpCodeProvider.GenerateCodeFromMember finden Sie eine Dokumentation, in der eine Implementierung dieser Methode beschrieben wird.See CSharpCodeProvider.GenerateCodeFromMember for documentation describing an implementation of this method.

Applies to

See also