ColumnExpression.MakeNullable 方法

參考

定義

命名空間:: Microsoft.EntityFrameworkCore.Query.SqlExpressions

組件:: Microsoft.EntityFrameworkCore.Relational.dll

套件:: Microsoft.EntityFrameworkCore.Relational v3.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v3.1.0

套件:: Microsoft.EntityFrameworkCore.Relational v5.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v6.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v7.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v8.0.0

套件:: Microsoft.EntityFrameworkCore.Relational v9.0.0

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

來源:: ColumnExpression.cs

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

讓此資料行成為可為 Null。

public Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression MakeNullable ();

public abstract Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression MakeNullable ();

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression MakeNullable ();

member this.MakeNullable : unit -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression

abstract member MakeNullable : unit -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression

abstract member MakeNullable : unit -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression
override this.MakeNullable : unit -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ColumnExpression

Public Function MakeNullable () As ColumnExpression

Public MustOverride Function MakeNullable () As ColumnExpression

Public Overridable Function MakeNullable () As ColumnExpression

傳回

ColumnExpression

新的運算式，其 IsNullable 屬性設定為 true。

適用於