ExpandoObject.IDictionary<String,Object>.ContainsKey(String) 方法

定义

命名空间:

System.Dynamic

程序集:

System.Linq.Expressions.dll

Source:

ExpandoObject.cs

确定字典是否包含指定的键。

 virtual bool System.Collections.Generic.IDictionary<System.String,System.Object>.ContainsKey(System::String ^ key) = System::Collections::Generic::IDictionary<System::String ^, System::Object ^>::ContainsKey;

bool IDictionary<string,object>.ContainsKey (string key);

abstract member System.Collections.Generic.IDictionary<System.String,System.Object>.ContainsKey : string -> bool
override this.System.Collections.Generic.IDictionary<System.String,System.Object>.ContainsKey : string -> bool

Function ContainsKey (key As String) As Boolean Implements IDictionary(Of String, Object).ContainsKey

参数

key

String

要在字典中查找的键。

返回

Boolean

如果字典包含具有指定键的元素，则为 true；否则为 false。

实现

ContainsKey(TKey)