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Is it possible to create a class in .NET 4 with:
For example, this C# class will not compile for me:
public class MyClass { public object Item { get; set; } public object this[string index] { get { return null; } set { } } } The compiler gives an error CS0102:
The type 'MyClass' already contains a definition for 'Item'
although I am only explicitly defining Item once.
847
Like functions, Indexers can also be overloaded. In C#, we can have multiple indexers in a single class. To overload an indexer, declare it with multiple parameters and each parameter should have a different data type. Indexers are overloaded by passing 2 different types of parameters.
The new concept in C# it is an object that acts as an array. It is an object that is to be indexed as an array. Indexer modifier can be private, protected, public or internal. The return type can be any valid C# data types. Indexers in C# must have atleast one parameter.
Indexers are a syntactic convenience that enable you to create a class, struct, or interface that client applications can access as an array. The compiler will generate an Item property (or an alternatively named property if IndexerNameAttribute is present), and the appropriate accessor methods.
Indexers enable objects to be indexed in a similar manner to arrays. A get accessor returns a value. A set accessor assigns a value. The this keyword is used to define the indexer.
Based on this site, it is possible to use an attribute to rename the Indexer
public class MyClass { public object Item { get; set; } [System.Runtime.CompilerServices.IndexerName("MyItem")] public object this[string index] { get { return null; } set { } } } C# internally creates a property called Item for languages that don't support the indexer. You can control this name using the IndexerNameAttribute, like this:
[IndexerName("MyIndexer")] public object this[string index] { get { return blah; } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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