Convert Indexer to Method refactoring

ReSharper | Refactor | Convert | Indexer to Method…
ReSharper_Indexer2Function

This refactoring helps you convert one or both accessors of an indexer into methods and update usages of the indexer in the current solution accordingly.

In the example below ReSharper converts both getter and setter accessors of the indexer and updates the usage:

Before refactoring After refactoring

Before refactoring	After refactoring
`class BookLibrary { private Book[] books = new Book[1000]; public Book this[int index] { get { if (index >= books.Length) throw new IndexOutOfRangeException("incorrect index"); return books[index]; } set { if (index >= books.Length) throw new IndexOutOfRangeException("incorrect index"); books[index] = value; } } public void TestInsertBookAt(Book book, int index) { this[index] = book; } }`	`class BookLibrary { private Book[] books = new Book[1000]; public void SetItem(int index, Book value) { if (index >= books.Length) throw new IndexOutOfRangeException("incorrect index"); books[index] = value; } public Book GetItem(int index) { if (index >= books.Length) throw new IndexOutOfRangeException("incorrect index"); return books[index]; } public void TestInsertBookAt(Book book, int index) { SetItem(index, book); } }`

class BookLibrary
{
    private Book[] books = new Book[1000];

    public Book this[int index]
    {
        get
        {
            if (index >= books.Length)
                throw new IndexOutOfRangeException("incorrect index");
            return books[index];
        }
        set
        {
            if (index >= books.Length)
                throw new IndexOutOfRangeException("incorrect index");
            books[index] = value;
        }
    }

    public void TestInsertBookAt(Book book, int index)
    {
        this[index] = book;
    }
}

class BookLibrary
{
    private Book[] books = new Book[1000];

    public void SetItem(int index, Book value)
    {
        if (index >= books.Length)
            throw new IndexOutOfRangeException("incorrect index");
        books[index] = value;
    }

    public Book GetItem(int index)
    {
        if (index >= books.Length)
            throw new IndexOutOfRangeException("incorrect index");
        return books[index];
    }

    public void TestInsertBookAt(Book book, int index)
    {
        SetItem(index, book);
    }
}

To convert an indexer to a method

Place the caret at this keyword of an indexer in the editor or select an indexer in the File Structure window.
Do one of the following:
- Press Ctrl+Shift+R and then choose Convert Indexer to Method(s)
- Right-click and choose Refactor | Convert Indexer to Method(s) in the context menu.
- Choose ReSharper | Refactor | Convert | Indexer to Method… in the main menu.
The Convert Indexer to Method(s) dialog will open.
Use controls in the dialog to choose which accessors should be converted and to specify names for the created methods.
To apply the refactoring, click Next.
If no conflicts are found, ReSharper performs the refactoring immediately. Otherwise, it prompts you to resolve conflicts.

This feature is supported in the following languages and technologies:

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.

Last modified: 20 August 2018

ReSharper 2018.1 Help

Convert Indexer to Method refactoring

To convert an indexer to a method

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Procedures: