考虑以下位于文件"MyClass.cs"中的类:
using System;
public class MyClass : Entity<long>
{
public long Id
{
get;
set;
}
[Required]
public string Name
{
get;
set;
}
public string Slug
{
get;
set;
}
public DateTime CreatedOn
{
get;
private set;
}
public DateTime UpdatedOn
{
get;
private set;
}
/* ... */
}
目前我手动创建数据契约类,看起来如下:
[DataContract(Namespace = "http://example.com/", Name = "MyClass")]
public sealed class MyClass
{
[DataMember(EmitDefaultValue = false, Name = "Id")]
public long Id
{
get;
set;
}
[DataMember(EmitDefaultValue = false, Name = "Name", IsRequired = true)]
public string Name
{
get;
set;
}
[DataMember(EmitDefaultValue = false, Name = "Slug")]
public string Slug
{
get;
set;
}
[DataMember(EmitDefaultValue = false, Name = "CreatedOn")]
public DateTime CreatedOn
{
get;
set;
}
[DataMember(EmitDefaultValue = false, Name = "UpdatedOn")]
public DateTime UpdatedOn
{
get;
set;
}
}
我想使用Roslyn重写"MyClass.cs",使其看起来像我手工创建的类一样。目前我的代码如下:
using System;
using System.IO;
using Roslyn.Compilers.CSharp;
internal class Program
{
private static void Main()
{
var reader = new StreamReader(@"..\..\MyClass.cs");
var source = reader.ReadToEnd();
var tree = SyntaxTree.ParseCompilationUnit(source);
var rewriter = new MyRewriter();
var newRoot = rewriter.Visit(tree.Root);
Console.WriteLine(newRoot.Format());
}
}
public class MyRewriter : SyntaxRewriter
{
protected override SyntaxNode VisitClassDeclaration(ClassDeclarationSyntax node)
{
var declaration = (TypeDeclarationSyntax) base.VisitClassDeclaration(node);
return ((ClassDeclarationSyntax) declaration).Update(
declaration.Attributes,
Syntax.TokenList(Syntax.Token(SyntaxKind.PublicKeyword), Syntax.Token(SyntaxKind.SealedKeyword)),
declaration.Keyword,
declaration.Identifier,
declaration.TypeParameterListOpt,
null,
declaration.ConstraintClauses,
declaration.OpenBraceToken,
declaration.Members,
declaration.CloseBraceToken,
declaration.SemicolonTokenOpt);
}
protected override SyntaxNode VisitPropertyDeclaration(PropertyDeclarationSyntax node)
{
var typeSyntax = node.Type;
if (node.Identifier.ValueText == "Id")
{
typeSyntax = Syntax.IdentifierName("string");
}
var newProperty = Syntax.PropertyDeclaration(
modifiers: Syntax.TokenList(Syntax.Token(SyntaxKind.PublicKeyword)),
type: typeSyntax,
identifier: node.Identifier,
accessorList: Syntax.AccessorList(
accessors: Syntax.List(
Syntax.AccessorDeclaration(SyntaxKind.GetAccessorDeclaration,
semicolonTokenOpt: Syntax.Token(SyntaxKind.SemicolonToken)),
Syntax.AccessorDeclaration(SyntaxKind.SetAccessorDeclaration,
semicolonTokenOpt: Syntax.Token(SyntaxKind.SemicolonToken))
)
)
);
return newProperty;
}
}
我一直在尝试找到一种方法,将DataMember和DataContract自定义属性添加到MyClass中,但一直没有成功。有什么办法可以添加这些自定义属性吗?