System.Generics.Collections.TDictionary.TryAdd

• Up to Parent: TDictionary

Delphi

function TryAdd(const Key: TKey; const Value: TValue): Boolean;

C++

bool __fastcall TryAdd(const TKey Key, const TValue Value);

Properties

Type	Visibility	Source	Unit	Parent
function	public	System.Generics.Collections.pas System.Generics.Collections.hpp	System.Generics.Collections	TDictionary

Description

Add key-value pair when key does not exist.

TryAdd adds a key-value pair to a dictionary when the key does not exist. The key cannot be nil, but the value can.

This method checks to see if the key exists in the dictionary, and if it does, it exits with False. Otherwise, it is equivalent to Add (key, value) and returns True.

See Also

• Items

• Add

• AddOrSetValue

• OnKeyNotify

• OnValueNotify

Code Examples

• Generics_Collections_TDictionary (Delphi)