ImmutableSortedDictionary<TKey,TValue>.TryGetKey(TKey, TKey) 方法
定义
确定此字典是否包含指定的键。Determines whether this dictionary contains a specified key.
public:
virtual bool TryGetKey(TKey equalKey, [Runtime::InteropServices::Out] TKey % actualKey);
public bool TryGetKey (TKey equalKey, out TKey actualKey);
abstract member TryGetKey : 'Key * 'Key -> bool
override this.TryGetKey : 'Key * 'Key -> bool
Public Function TryGetKey (equalKey As TKey, ByRef actualKey As TKey) As Boolean
参数
- equalKey
- TKey
要搜索的键。The key to search for.
- actualKey
- TKey
如果已在字典中找到匹配键,则为该匹配键;如果找不到任何匹配键,则为 equalkey。The matching key located in the dictionary if found, or equalkey if no match is found.
返回
如果找到了 equalKey 的匹配项,则为 true;否则为 false。true if a match for equalKey is found; otherwise, false.
实现
注解
下面是一些 TryGetKey 可能有用的方案:Following are some scenarios where TryGetKey may be useful:
需要重用以前存储的对象引用,而不是创建新引用。You want to reuse a previously stored object reference instead of creating a new reference.
要查找对象的规范值You want to look up the canonical value of an object
要检索有关对象的更完整数据You want to retrieve more complete data about an object