C# CodeConstructor类代码示例

// This example declares two types, one of which inherits from another,
    // and creates a set of different styles of constructors using CodeConstructor.

    // Creates a new CodeCompileUnit to contain the program graph.
    CodeCompileUnit CompileUnit = new CodeCompileUnit();
    // Declares a new namespace object and names it.
    CodeNamespace Samples = new CodeNamespace("Samples");
    // Adds the namespace object to the compile unit.
    CompileUnit.Namespaces.Add( Samples );
    // Adds a new namespace import for the System namespace.
    Samples.Imports.Add( new CodeNamespaceImport("System") );            
    
    // Declares a new type and names it.
    CodeTypeDeclaration BaseType = new CodeTypeDeclaration("BaseType");                                                
    // Adds the new type to the namespace object's type collection.
    Samples.Types.Add(BaseType);
    
    // Declares a default constructor that takes no arguments.
    CodeConstructor defaultConstructor = new CodeConstructor();
    defaultConstructor.Attributes = MemberAttributes.Public;
    // Adds the constructor to the Members collection of the BaseType.
    BaseType.Members.Add(defaultConstructor);

    // Declares a constructor that takes a string argument.
    CodeConstructor stringConstructor = new CodeConstructor();
    stringConstructor.Attributes = MemberAttributes.Public;
    // Declares a parameter of type string named "TestStringParameter".
    stringConstructor.Parameters.Add( new CodeParameterDeclarationExpression("System.String", "TestStringParameter") );
    // Adds the constructor to the Members collection of the BaseType.
    BaseType.Members.Add(stringConstructor);
                
    // Declares a type that derives from BaseType and names it.
    CodeTypeDeclaration DerivedType = new CodeTypeDeclaration("DerivedType");
    // The DerivedType class inherits from the BaseType class.
    DerivedType.BaseTypes.Add( new CodeTypeReference("BaseType") );
    // Adds the new type to the namespace object's type collection.
    Samples.Types.Add(DerivedType);        
            
    // Declare a constructor that takes a string argument and calls the base class constructor with it.
    CodeConstructor baseStringConstructor = new CodeConstructor();
    baseStringConstructor.Attributes = MemberAttributes.Public;
    // Declares a parameter of type string named "TestStringParameter".    
    baseStringConstructor.Parameters.Add( new CodeParameterDeclarationExpression("System.String", "TestStringParameter") );
    // Calls a base class constructor with the TestStringParameter parameter.
    baseStringConstructor.BaseConstructorArgs.Add( new CodeVariableReferenceExpression("TestStringParameter") );
    // Adds the constructor to the Members collection of the DerivedType.
    DerivedType.Members.Add(baseStringConstructor);
    
    // Declares a constructor overload that calls another constructor for the type with a predefined argument.
    CodeConstructor overloadConstructor = new CodeConstructor();
    overloadConstructor.Attributes = MemberAttributes.Public;
    // Sets the argument to pass to a base constructor method.
    overloadConstructor.ChainedConstructorArgs.Add( new CodePrimitiveExpression("Test") );
    // Adds the constructor to the Members collection of the DerivedType.
    DerivedType.Members.Add(overloadConstructor);        
    
    // Declares a constructor overload that calls the default constructor for the type.
    CodeConstructor overloadConstructor2 = new CodeConstructor();
    overloadConstructor2.Attributes = MemberAttributes.Public;
    overloadConstructor2.Parameters.Add( new CodeParameterDeclarationExpression("System.Int32", "TestIntParameter") );
    // Sets the argument to pass to a base constructor method.
    overloadConstructor2.ChainedConstructorArgs.Add( new CodeSnippetExpression("") );
    // Adds the constructor to the Members collection of the DerivedType.
    DerivedType.Members.Add(overloadConstructor2);            

    // A C# code generator produces the following source code for the preceeding example code:

    // public class BaseType {
    //     
    //     public BaseType() {
    //     }
    //        
    //     public BaseType(string TestStringParameter) {
    //     }
    // }
    //    
    // public class DerivedType : BaseType {
    //        
    //     public DerivedType(string TestStringParameter) : 
    //             base(TestStringParameter) {
    //     }
    //        
    //     public DerivedType() : 
    //             this("Test") {
    //     }
    //
    //     public DerivedType(int TestIntParameter) : 
    //                this() {
    //     }
    // }