OptionalProperty.IsDefined 方法

public:
 static bool IsDefined(System::Object ^ value);

public static bool IsDefined(object value);

static member IsDefined : obj -> bool

Public Shared Function IsDefined (value As Object) As Boolean

參數

傳回

public:
 static bool IsDefined(System::String ^ value);

public static bool IsDefined(string value);

static member IsDefined : string -> bool

Public Shared Function IsDefined (value As String) As Boolean

參數

傳回

public:
 static bool IsDefined(System::Text::Json::JsonElement value);

public static bool IsDefined(System.Text.Json.JsonElement value);

static member IsDefined : System.Text.Json.JsonElement -> bool

Public Shared Function IsDefined (value As JsonElement) As Boolean

參數

傳回

public:
generic <typename T>
 where T : value class static bool IsDefined(Nullable<T> value);

public static bool IsDefined<T>(T? value) where T : struct;

static member IsDefined : Nullable<'T (requires 'T : struct)> -> bool (requires 'T : struct)

Public Shared Function IsDefined(Of T As Structure) (value As Nullable(Of T)) As Boolean

類型參數

參數

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