CodeDomProvider.GenerateCodeFromMember 方法

定義

命名空間:

System.CodeDom.Compiler

組件:

System.CodeDom.dll

套件:

System.CodeDom v8.0.0

來源:

CodeDomProvider.cs

產生指定程式碼文件物件模型 (CodeDOM) 成員宣告的程式碼，並使用指定的選項將其傳送至指定的文字寫入器。

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)

參數

member

CodeTypeMember

CodeTypeMember 物件，指示要為其產生程式碼的成員。

writer

TextWriter

接收輸出程式碼的 TextWriter。

options

CodeGeneratorOptions

CodeGeneratorOptions，表示要用來產生程式碼的選項。

例外狀況

NotImplementedException

不可以在衍生類別中覆寫這個方法。

範例

下列程式代碼範例示範 如何使用 GenerateCodeFromMember 和 VBCodeProvider 類別所CSharpCodeProvider實作的方法。

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

備註

基類實作會擲回 NotImplementedException。 如需說明此方法實作的檔，請參閱 CSharpCodeProvider.GenerateCodeFromMember 。

另請參閱

• TextWriter
• CodeTypeMember
• CodeGeneratorOptions