C# GenerateCodeFromCompileUnit 正在生成带有特殊字符的代码 [Microsoft.CSharp.CSharpCodeProvider]

Question

我正在使用 GenerateCodeFromCompileUnit 和 IndentedTextWriter 从 C# 源文件生成代码。这样做我可以生成一个 .cs 文件。但是我看到在每个声明的变量和函数 Return 类型之前插入了一个特殊字符 @ 。这是我的代码。

我正在使用 Class 来保存要插入的函数详细信息。

Dim provider As Microsoft.CSharp.CSharpCodeProvider
Dim options = New System.CodeDom.Compiler.CompilerParameters
options.ReferencedAssemblies.Add("System.dll")
options.GenerateExecutable = False
options.GenerateInMemory = True
options.IncludeDebugInformation = True
options.OutputAssembly = "FunctionEvaluated.dll"

Dim compileUnit As System.CodeDom.CodeCompileUnit
compileUnit = New CodeDom.CodeCompileUnit
Dim codeNamespace = New CodeDom.CodeNamespace("NewNamespace")

compileUnit.Namespaces.Add(codeNamespace)

Dim classForCompile = New CodeDom.CodeTypeDeclaration("NewAction")
codeNamespace.Types.Add(classForCompile)

Dim functionToEvaluate = New CodeDom.CodeMemberMethod()

Dim returnType As CodeDom.CodeTypeReference

If functionClass.FunctionNameAndType.Select(Function(fn) fn.Value)(0).ToString() = "void" Then
    returnType = New CodeDom.CodeTypeReference("void")
Else

    returnType = New CodeDom.CodeTypeReference(functionClass.FunctionNameAndType.Select(Function(fn) fn.Value)(0).ToString())
End If

Dim parameterExpressionCollection = New CodeDom.CodeParameterDeclarationExpressionCollection()

For Each ip In functionClass.FunctionNameIP


    For Each fnIP In ip.Value
        Dim parameterExpression As CodeDom.CodeParameterDeclarationExpression
        parameterExpression = New CodeDom.CodeParameterDeclarationExpression(fnIP.Value.ToString(), fnIP.Key.ToString())

        parameterExpressionCollection.Add(parameterExpression)
    Next
Next

functionToEvaluate.Name = functionClass.FunctionNameAndType.Select(Function(fn) fn.Key)(0).ToString()
functionToEvaluate.ReturnType = returnType
functionToEvaluate.Parameters.AddRange(parameterExpressionCollection)


classForCompile.Members.Add(functionToEvaluate)

provider = New Microsoft.CSharp.CSharpCodeProvider
Dim sourceFile As String
sourceFile = "FunctionEvaluated.cs"
Dim tw As IndentedTextWriter = New IndentedTextWriter(New StreamWriter(sourceFile, False), vbTab)
provider.GenerateCodeFromCompileUnit(compileUnit, tw, New CodeGeneratorOptions())
tw.Close()

输出

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:4.0.30319.42000
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace NewNamespace {
    
    
    public class NewAction {
        
        private @int functionAdd(@int b, @int a) {
        }
    }
}

Answer 1

我相信你的问题出在行上

New CodeDom.CodeTypeReference(functionClass.FunctionNameAndType.Select(Function(fn) fn.Value)(0).ToString())

和

parameterExpression = New CodeDom.CodeParameterDeclarationExpression(fnIP.Value.ToString(), fnIP.Key.ToString())

我怀疑使用字符串指定本机类型导致 DOM 认为这是用户定义的类型 'int' 并用 @ 屏蔽它以防止本机 int 从被使用。来自 https://en.wikipedia.org/wiki/C_Sharp_syntax#Keywords

If an identifier is needed which would be the same as a reserved keyword, it may be prefixed by the @ character to distinguish it

要确保输出使用像 int 这样的本机类型，您可以尝试使用

new CodeTypeReference(typeof(int))

换句话说，使用真正的 Type 和 public CodeTypeReference(Type type); 构造函数。

要从命名类型的字符串中获取实际类型，您可以使用 Type.GetType(String) 函数。

所以试试这个：

New CodeDom.CodeTypeReference(Type.GetType(functionClass.FunctionNameAndType.Select(Function(fn) fn.Value)(0).ToString()))

和

parameterExpression = New CodeDom.CodeParameterDeclarationExpression(Type.GetType(fnIP.Value.ToString()), fnIP.Key.ToString())

C# GenerateCodeFromCompileUnit 正在生成带有特殊字符的代码 [Microsoft.CSharp.CSharpCodeProvider]

C# GenerateCodeFromCompileUnit is Generating Code with Special Characters [Microsoft.CSharp.CSharpCodeProvider]

c#

codedom

streamwriter

system-codedom-compiler