BuildProvider.GenerateCode(AssemblyBuilder) 方法

public:
 virtual void GenerateCode(System::Web::Compilation::AssemblyBuilder ^ assemblyBuilder);

public virtual void GenerateCode (System.Web.Compilation.AssemblyBuilder assemblyBuilder);

abstract member GenerateCode : System.Web.Compilation.AssemblyBuilder -> unit
override this.GenerateCode : System.Web.Compilation.AssemblyBuilder -> unit

Public Overridable Sub GenerateCode (assemblyBuilder As AssemblyBuilder)

参数

示例

下面的代码示例演示了从抽象 BuildProvider 基类继承的简单生成提供程序实现。 生成提供程序替代基类的 CodeCompilerType、 GetGeneratedType和 GenerateCode 成员。

using System;
using System.Collections;
using System.IO;
using System.Text;
using System.Web;
using System.Web.Compilation;
using System.CodeDom.Compiler;
using System.CodeDom;
using System.Security;
using System.Security.Permissions;

// Define a simple build provider implementation.
[PermissionSet(SecurityAction.Demand, Unrestricted = true)]
public class SampleBuildProvider : BuildProvider
{
    // Define an internal member for the compiler type.
    protected CompilerType _compilerType = null;

    public SampleBuildProvider()
    {
        _compilerType = GetDefaultCompilerTypeForLanguage("C#");
    }

    // Return the internal CompilerType member 
    // defined in this implementation.
    public override CompilerType CodeCompilerType
    {
        get { return _compilerType; }
    }

    // Define the build provider implementation of the GenerateCode method.
    public override void GenerateCode(AssemblyBuilder assemBuilder)
    {
        // Generate a code compile unit, and add it to
        // the assembly builder.

        TextWriter tw = assemBuilder.CreateCodeFile(this);
        if (tw != null)
        {
            try
            {
                // Generate the code compile unit from the virtual path.
                CodeCompileUnit compileUnit = SampleClassGenerator.BuildCompileUnitFromPath(VirtualPath);

                // Generate the source for the code compile unit, 
                // and write it to a file specified by the assembly builder.
                CodeDomProvider provider = assemBuilder.CodeDomProvider;
                provider.GenerateCodeFromCompileUnit(compileUnit, tw, null);
            }
            finally
            {
                tw.Close();
            }
        }
    }

    public override System.Type GetGeneratedType(CompilerResults results)
    {
        string typeName = SampleClassGenerator.TypeName;

        return results.CompiledAssembly.GetType(typeName);
    }
}

Imports System.Collections
Imports System.IO
Imports System.Text
Imports System.Web
Imports System.Web.Compilation
Imports System.CodeDom.Compiler
Imports System.CodeDom
Imports System.Security
Imports System.Security.Permissions

<PermissionSet(SecurityAction.Demand, Unrestricted := true)> _
Public Class SampleBuildProvider
    Inherits BuildProvider

    Protected _compilerType As CompilerType = Nothing

    Public Sub New()
        _compilerType = GetDefaultCompilerType()
    End Sub

    ' Return the internal CompilerType member 
    ' defined in this implementation.
    Public Overrides ReadOnly Property CodeCompilerType() As CompilerType
        Get
            CodeCompilerType = _compilerType
        End Get
    End Property


    ' Define the build provider implementation of the GenerateCode method.
    Public Overrides Sub GenerateCode(ByVal assemBuilder As AssemblyBuilder)
        ' Generate a code compile unit, and add it to
        ' the assembly builder.

        Dim tw As TextWriter = assemBuilder.CreateCodeFile(Me)
        If Not tw Is Nothing Then
            Try
                ' Generate the code compile unit from the virtual path.
                Dim compileUnit As CodeCompileUnit = _
                        SampleClassGenerator.BuildCompileUnitFromPath(VirtualPath)

                ' Generate the source for the code compile unit, 
                ' and write it to a file specified by the assembly builder.
                Dim provider As CodeDomProvider = assemBuilder.CodeDomProvider
                provider.GenerateCodeFromCompileUnit(compileUnit, tw, Nothing)
            Finally
                tw.Close()
            End Try

        End If
    End Sub

    Public Overrides Function GetGeneratedType(ByVal results As CompilerResults) As System.Type
        Dim typeName As String = SampleClassGenerator.TypeName

        Return results.CompiledAssembly.GetType(typeName)
    End Function

End Class

注解

若要实现生成自定义文件类型的源代码的生成提供程序，请从 BuildProvider 类派生类，并重写 GenerateCode 方法以生成支持的文件类型的源代码。

通常，生成提供程序的 GenerateCode 实现会 VirtualPath 读取 属性、分析内容，并将生成的源代码添加到指定的 AssemblyBuilder 对象。 可以对象或 CodeDOM 图的形式 TextWriter 向程序集贡献源代码。 若要通过 TextWriter 对象将源代码添加到程序集，请使用 CreateCodeFile 方法。 若要将 CodeDOM 图中的源代码添加到程序集，请使用 AddCodeCompileUnit 方法。

如果生成提供程序以特定编程语言生成源代码，则必须重写 CodeCompilerType 属性以返回 CompilerType 受支持编程语言的 对象。

适用于

另请参阅

• OpenReader
• OpenStream
• AssemblyBuilder
• 动态源代码生成和编译