ColumnExpression.MakeNullable 方法

参考

定义

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

程序集:: Microsoft.EntityFrameworkCore.Relational.dll

包:: Microsoft.EntityFrameworkCore.Relational v3.0.0

包:: Microsoft.EntityFrameworkCore.Relational v3.1.0

包:: Microsoft.EntityFrameworkCore.Relational v5.0.0

包:: Microsoft.EntityFrameworkCore.Relational v6.0.0

包:: Microsoft.EntityFrameworkCore.Relational v7.0.0

包:: Microsoft.EntityFrameworkCore.Relational v8.0.0

包:: Microsoft.EntityFrameworkCore.Relational v9.0.0

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

Source:: ColumnExpression.cs

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

使此列可为空。

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

返回

ColumnExpression

属性设置为 true 的新表达式 IsNullable 。

适用于