C# CodeDOM：在运行时添加 Enum 成员

Question

我想做的是将“NoneOfTheBelow”选项添加到从 XSD 文件解析的所有枚举中。 我正在扩展 Xsd2Code 工具 中的代码。

当我使用下面的代码生成输出时，枚举不包含我添加的新成员。 有人可以帮忙吗？

var ns = new CodeNamespace();

/* ... Initialize ns from XSD ... */

// Create a dummy array for iteration, because a collection cannot be modified when it is being iterated over.
CodeTypeDeclarationCollection types = new CodeTypeDeclarationCollection();
foreach (CodeTypeDeclaration t0 in ns.Types)
{
   types.Add(new CodeTypeDeclaration(t0.Name));
}

// Scan for enum types and add desired markup to the members.
int typeIndex = 0;
foreach (CodeTypeDeclaration t0 in types)
{
   CodeTypeDeclaration t = ns.Types[typeIndex];

   // Add an element for blank entry to the enum.
   CodeTypeMember noneOfTheBelow = new CodeTypeMember();
   noneOfTheBelow.Name = "NoneOfTheBelow";
   noneOfTheBelow.Comments.Add(new CodeCommentStatement( "<summary>None of the below.</summary>"));
   noneOfTheBelow.CustomAttributes.Add(new CodeAttributeDeclaration("XmlEnum", new CodeAttributeArgument(new CodePrimitiveExpression("Test"))));
   noneOfTheBelow.CustomAttributes.Add(new CodeAttributeDeclaration("Description", new CodeAttributeArgument(new CodePrimitiveExpression("Test"))));
   t.Members.Insert(0, noneOfTheBelow);
}

Answer 1

对于枚举，您需要添加 CodeMemberField 实例，而不是 CodeTypeMember，因此类似于：

CodeMemberField noneOfTheBelow = new CodeMemberField();
noneOfTheBelow.Attributes = MemberAttributes.Public | MemberAttributes.Static;
noneOfTheBelow.Name = "NoneOfTheBelow";
t.Members.Insert(0, noneOfTheBelow);