通过

ExistsExpression 构造函数

  • 参考

定义

命名空间:
Microsoft.EntityFrameworkCore.Query.SqlExpressions
程序集:
Microsoft.EntityFrameworkCore.Relational.dll
包:
Microsoft.EntityFrameworkCore.Relational v8.0.0
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

重载

ExistsExpression(SelectExpression, RelationalTypeMapping)

创建 ExistsExpression 类的新实例。
ExistsExpression(SelectExpression, Boolean, RelationalTypeMapping)

创建 ExistsExpression 类的新实例。

ExistsExpression(SelectExpression, RelationalTypeMapping)

创建 ExistsExpression 类的新实例。

public ExistsExpression (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping);
new Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
Public Sub New (subquery As SelectExpression, typeMapping As RelationalTypeMapping)

参数

subquery
SelectExpression

要检查 存在的子查询。

typeMapping
RelationalTypeMapping

与 RelationalTypeMapping 表达式关联的 。

适用于

ExistsExpression(SelectExpression, Boolean, RelationalTypeMapping)

创建 ExistsExpression 类的新实例。

public ExistsExpression (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery, bool negated, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping);
public ExistsExpression (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery, bool negated, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping);
new Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * bool * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
Public Sub New (subquery As SelectExpression, negated As Boolean, typeMapping As RelationalTypeMapping)

参数

subquery
SelectExpression

要检查 存在的子查询。

negated
Boolean

一个值，该值指示是否存在检查是否为负。

typeMapping
RelationalTypeMapping

与 RelationalTypeMapping 表达式关联的 。

适用于