BuildProvider.GenerateCode(AssemblyBuilder) 方法

定義

命名空間:

System.Web.Compilation

組件:

System.Web.dll

產生建置提供者虛擬路徑的原始碼，並將原始碼加入指定的組合語言建置器。

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)

參數

assemblyBuilder

AssemblyBuilder

就是參考建置提供者產生的原始碼的組合語言建置器。

範例

以下程式碼範例說明了一個簡單的建置提供者實作，繼承自抽象 BuildProvider 基底類別。 建置提供者會 CodeCompilerType覆蓋 、 GetGeneratedType以及 GenerateCode 基類成員。

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

備註

若要實作一個產生自訂檔案類型原始碼的建置提供者，請從該 BuildProvider 類別衍生出一個類別，並覆寫 GenerateCode 產生支援檔案類型原始碼的方法。

通常，建置提供者的 GenerateCode 實作會 VirtualPath 讀取屬性、解析內容，並將產生的原始碼加入指定的 AssemblyBuilder 物件。 你可以以物件或 CodeDOM 圖形的形式，貢獻原始碼到組合語言 TextWriter 。 若要透過物件將原始碼加入組合語言 TextWriter ，請使用該 CreateCodeFile 方法。 若要將 CodeDOM 圖中的原始碼加入組合語言，請使用該 AddCodeCompileUnit 方法。

如果建置提供者產生特定程式語言的原始碼，你必須覆寫該 CodeCompilerType 屬性以回傳 CompilerType 該程式語言的物件。

另請參閱

• OpenReader
• OpenStream
• AssemblyBuilder
• 動態原始程式碼的產生和編譯