CodeConstructor Class

Represents a declaration for an instance constructor of a type.

Namespace:  System.CodeDom
Assembly:  System (in System.dll)

[SerializableAttribute]
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)]
public class CodeConstructor : CodeMemberMethod

CodeConstructor can be used to represent a declaration of an instance constructor for a type. Use CodeTypeConstructor to declare a static constructor for a type.

If the constructor calls a base class constructor, set the constructor arguments for the base class constructor in the BaseConstructorArgs property. If the constructor overloads another constuctor for the type, set the constructor arguments to pass to the overloaded type constructor in the ChainedConstructorArgs property.

This example demonstrates using a CodeConstructor to declare several types of constructors.

// 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() { 
//     } 
// }

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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