ReSharper
 
2022.1
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  1. Code generation
  2. Generate type members
  3. Generate Type Constructors

Generate Type Constructors

Last modified: 21 July 2022

ReSharper | Edit | Generate Code | Constructor

Alt+Insert | Constructor (ReSharper_GenerateConstructor)

The constructor generation wizard creates a non-default constructor that takes parameters for selected fields , properties and auto-properties.

All generated constructors follow the same pattern where:

  • Each field , property, or auto-property included in the constructor is initialized with a parameter.

  • The name of the parameter is derived from the name of the corresponding field or property.

tip

You can quickly generate constructors by typing ctor (without parameters), ctorf (with parameters that initialize all fields) or ctorp (with parameters that initialize all properties).

If there are non-default base type constructors, the required parameters are added to the generated constructor and passed to the base class constructor.

In the example below, this command is used to generate a new Circle constructor that takes two additional parameters to initialize _radius and _center fields.

Before generation

After generation

class Shape
{
  public Shape(Color color)
    { Color = color; }

  public Color Color { get; }
}

class Circle : Shape
{
  int _radius;
  Point _center;
  string _id;

  public Circle(Color color) : base(color)
  {
  }
}
class Shape
{
  public Shape(Color color)
    { Color = color; }

  public Color Color { get; }
}

class Circle : Shape
{
  int _radius;
  Point _center;
  string _id;

  public Circle(Color color) : base(color)
  {
  }

  public Circle(Color color,
        int radius, Point center, string id) : base(color)
  {
      _radius = radius;
      _center = center;
      _id = id;
  }
}

tip

You can configure common code generation preferences on the Code Editing | Members Generation page of ReSharper options (Alt+R, O).

Generate a constructor

  1. In the editor, set the caret at the type name or within a type at the line where you want to insert a constructor. If the caret is on the type name, the generated code will be added in the beginning of the type declaration.

  2. Press Alt+Insert or choose ReSharper | Edit | Generate Code… from the main menu. Alternatively, you can press Ctrl+Shift+A, start typing the command name in the popup, and then choose it there.

  3. In the Generate popup, select Constructor.

  4. In the Generate dialog that appears, select type members that should be initialized in the new constructor. Optionally, select one or several base class constructors. For every selected base constructor, a new constructor will be generated that will call the base and additionally initialize selected members.

    Generating type constructors with ReSharper

    Optionally, use the following controls in the dialog:

    • Access Rights — allows you to define access rights for the generated constructor.

    • Check parameters for null (appears if the class has fields or properties of nullable types) — if this checkbox is selected, ReSharper will generate configurable null checks for each nullable parameter, for example: if (param == null) throw new ArgumentNullException(nameof(param));

    • Make parameters optional — if this checkbox is selected, ReSharper will make all parameters of the generated constructor optional and add default values corresponding to the parameter types.

  5. Click Finish to complete the wizard.

    You can also click Options to review or modify common code generation preferences on the Code Editing | Members Generation page of ReSharper options.

tip

To bind this code generation command to its own shortcut, go to Tools | Options | Environment | Keyboard and assign a shortcut for the ReSharper_GenerateConstructor command.

This feature is supported in the following languages and technologies:

Language: C#

Language: VB.NET

Language: C++

Language: HTML

Language: ASP.NET

Language: Razor

Language: JavaScript

Language: TypeScript

Language: CSS

Language: XML

Language: XAML

Language: Resx

Language: Build Scripts

Language: Protobuf

Language: JSON

Feature is available in C#

Feature is available in Visual Basic .NET

Feature is available in C++

Feature is not available in HTML

Feature is not available in ASP.NET

Feature is not available in Razor

Feature is not available in JavaScript

Feature is available in TypeScript

Feature is not available in CSS

Feature is not available in XML

Feature is not available in XAML

Feature is not available in Resource files

Feature is not available in build script files

Feature is not available in Protobuf

Feature is not available in JSON

The instructions and examples given here address the use of the feature in C#. For details specific to other languages, see corresponding topics in the ReSharper by language section.

See also

Procedures

External Links