ColumnOperation Class

Reference

Definition

Namespace:: Microsoft.EntityFrameworkCore.Migrations.Operations

Assembly:: Microsoft.EntityFrameworkCore.Relational.dll

Package:: Microsoft.EntityFrameworkCore.Relational v1.1.6

Package:: Microsoft.EntityFrameworkCore.Relational v2.0.3

Package:: Microsoft.EntityFrameworkCore.Relational v2.1.11

Package:: Microsoft.EntityFrameworkCore.Relational v2.2.6

Package:: Microsoft.EntityFrameworkCore.Relational v3.0.0

Package:: Microsoft.EntityFrameworkCore.Relational v3.1.0

Package:: Microsoft.EntityFrameworkCore.Relational v5.0.0

Package:: Microsoft.EntityFrameworkCore.Relational v6.0.0

Package:: Microsoft.EntityFrameworkCore.Relational v7.0.0

Package:: Microsoft.EntityFrameworkCore.Relational v8.0.0

Important

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A MigrationOperation for operations on columns. See also AddColumnOperation and AlterColumnOperation.

public class ColumnOperation : Microsoft.EntityFrameworkCore.Migrations.Operations.MigrationOperation

public abstract class ColumnOperation : Microsoft.EntityFrameworkCore.Migrations.Operations.MigrationOperation, Microsoft.EntityFrameworkCore.Migrations.Operations.ITableMigrationOperation

type ColumnOperation = class
    inherit MigrationOperation

type ColumnOperation = class
    inherit MigrationOperation
    interface ITableMigrationOperation

Public Class ColumnOperation
Inherits MigrationOperation

Public MustInherit Class ColumnOperation
Inherits MigrationOperation
Implements ITableMigrationOperation

Inheritance: Object

Annotatable

MigrationOperation
ColumnOperation

Inheritance: Object

AnnotatableBase

Annotatable

MigrationOperation
ColumnOperation

Derived: Microsoft.EntityFrameworkCore.Migrations.Operations.AddColumnOperation

Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation

Implements: ITableMigrationOperation

Remarks

See Database migrations for more information and examples.

Constructors

ColumnOperation()

Properties

ClrType	The CLR Type of the property or properties mapped to the column.
Collation	The collation for this column, or `null` if one hasn't been explicitly configured.
ColumnType	The store type of the column--for example, 'nvarchar(max)'.
Comment	Comment for this column
ComputedColumnSql	The SQL expression to use to compute the column value, `null` if the column is not computed.
DefaultValue	The default value for rows inserted without an explicit value for this column, or `null` if there is no default.
DefaultValueSql	The SQL expression to use as the default constraint when creating the column, or `null` if there is no default constraint.
IsDestructiveChange	Indicates whether or not the operation might result in loss of data in the database. (Inherited from MigrationOperation)
IsFixedLength	Indicates whether or not the column is constrained to fixed-length data.
IsNullable	Indicates whether or not th column can store `null` values.
IsReadOnly	Indicates whether the current object is read-only. (Inherited from AnnotatableBase)
IsRowVersion	Indicates whether or not this column acts as an automatic concurrency token in the same vein as 'rowversion'/'timestamp' columns on SQL Server.
IsStored	Whether the value of the computed column this property is mapped to is stored in the database, or calculated when it is read.
IsUnicode	Indicates whether or not the column can contain Unicode data, or `null` if this is not specified or does not apply to this column type.
Item[String]	Gets the value annotation with the given name, returning `null` if it does not exist. (Inherited from Annotatable)
MaxLength	The maximum amount of data that the column can store, or `null` if this is not specified or does not apply to this column type.
Name	The name of the column.
Precision	The maximum number of digits that the column can store, or `null` if this is not specified or does not apply to this column type.
Scale	The maximum number of decimal places that the column can store, or `null` if this is not specified or does not apply to this column type.
Schema	The schema that contains the table, or `null` if the default schema should be used.
Table	The table which contains the column.

Methods

AddAnnotation(String, Annotation)	Adds an annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from Annotatable)
AddAnnotation(String, Object)	Adds an annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from Annotatable)
AddAnnotations(IEnumerable<IAnnotation>)	Adds annotations to this object. (Inherited from AnnotatableBase)
AddAnnotations(IReadOnlyDictionary<String,Object>)	Adds annotations to this object. (Inherited from AnnotatableBase)
AddRuntimeAnnotation(String, Annotation)	Adds a runtime annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from AnnotatableBase)
AddRuntimeAnnotation(String, Object)	Adds a runtime annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from AnnotatableBase)
AddRuntimeAnnotations(IEnumerable<Annotation>)	Adds runtime annotations to this object. (Inherited from AnnotatableBase)
AddRuntimeAnnotations(IReadOnlyDictionary<String,Object>)	Adds runtime annotations to this object. (Inherited from AnnotatableBase)
CreateAnnotation(String, Object)	Creates a new annotation. (Inherited from Annotatable)
CreateRuntimeAnnotation(String, Object)	Creates a new runtime annotation. (Inherited from AnnotatableBase)
EnsureMutable()	Throws if the model is read-only. (Inherited from Annotatable)
EnsureReadOnly()	Throws if the model is not read-only. (Inherited from Annotatable)
FindAnnotation(String)	Gets the annotation with the given name, returning `null` if it does not exist. (Inherited from Annotatable)
FindRuntimeAnnotation(String)	Gets the runtime annotation with the given name, returning `null` if it does not exist. (Inherited from AnnotatableBase)
GetAnnotation(String)	Gets the annotation with the given name, throwing if it does not exist. (Inherited from AnnotatableBase)
GetAnnotations()	Gets all annotations on the current object. (Inherited from Annotatable)
GetOrAddAnnotation(String, Object)	Adds an annotation to this object or returns the existing annotation if one with the specified name already exists. (Inherited from Annotatable)
GetOrAddRuntimeAnnotationValue<TValue,TArg>(String, Func<TArg,TValue>, TArg)	Gets the value of the runtime annotation with the given name, adding it if one does not exist. (Inherited from AnnotatableBase)
GetRuntimeAnnotations()	Gets all runtime annotations on the current object. (Inherited from AnnotatableBase)
OnAnnotationSet(String, Annotation, Annotation)	Called when an annotation was set or removed. (Inherited from Annotatable)
RemoveAnnotation(String)	Removes the given annotation from this object. (Inherited from Annotatable)
RemoveRuntimeAnnotation(String)	Removes the given runtime annotation from this object. (Inherited from AnnotatableBase)
SetAnnotation(String, Annotation, Annotation)	Sets the annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from Annotatable)
SetAnnotation(String, Annotation)	Sets the annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from Annotatable)
SetAnnotation(String, Object)	Sets the annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from Annotatable)
SetRuntimeAnnotation(String, Annotation, Annotation)	Sets the runtime annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from AnnotatableBase)
SetRuntimeAnnotation(String, Object)	Sets the runtime annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from AnnotatableBase)

Explicit Interface Implementations

IAnnotatable.AddRuntimeAnnotation(String, Object)	Adds a runtime annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from AnnotatableBase)
IAnnotatable.FindAnnotation(String)	Gets the annotation with the given name, returning null if it does not exist. (Inherited from Annotatable)
IAnnotatable.FindRuntimeAnnotation(String)	Gets the runtime annotation with the given name, returning `null` if it does not exist. (Inherited from AnnotatableBase)
IAnnotatable.GetAnnotations()	Gets all annotations on the current object. (Inherited from Annotatable)
IAnnotatable.GetRuntimeAnnotations()	Gets all the runtime annotations on the current object. (Inherited from AnnotatableBase)
IAnnotatable.RemoveRuntimeAnnotation(String)	Removes the given runtime annotation from this object. (Inherited from AnnotatableBase)
IAnnotatable.SetRuntimeAnnotation(String, Object)	Sets the runtime annotation stored under the given key. Overwrites the existing annotation if an annotation with the specified name already exists. (Inherited from AnnotatableBase)
IMutableAnnotatable.AddAnnotation(String, Object)	Adds an annotation to this object. Throws if an annotation with the specified name already exists. (Inherited from Annotatable)
IMutableAnnotatable.RemoveAnnotation(String)	Removes the given annotation from this object. (Inherited from Annotatable)
IMutableAnnotatable.SetOrRemoveAnnotation(String, Object)	Sets the annotation stored under the given name. Overwrites the existing annotation if an annotation with the specified name already exists. Removes the existing annotation if `null` is supplied. (Inherited from Annotatable)
IReadOnlyAnnotatable.FindAnnotation(String)	Gets the annotation with the given name, returning `null` if it does not exist. (Inherited from AnnotatableBase)
IReadOnlyAnnotatable.GetAnnotations()	Gets all annotations on the current object. (Inherited from AnnotatableBase)
IReadOnlyAnnotatable.Item[String]	Gets the value of the annotation with the given name, returning `null` if it does not exist. (Inherited from AnnotatableBase)

Extension Methods

AnnotationsToDebugString(IAnnotatable, Int32)	Gets the debug string for all annotations declared on the object.
GetAnnotation(IAnnotatable, String)	Gets the annotation with the given name, throwing if it does not exist.
AddAnnotations(IMutableAnnotatable, IEnumerable<IAnnotation>)	Adds annotations to an object.
GetAnnotation(IMutableAnnotatable, String)	Gets the annotation with the given name, throwing if it does not exist.
GetOrAddAnnotation(IMutableAnnotatable, String, String)	Gets the existing annotation with a given key, or adds a new annotation if one does not exist.
SetOrRemoveAnnotation(IMutableAnnotatable, String, Object)	Sets the annotation stored under the given name. Overwrites the existing annotation if an annotation with the specified name already exists. Removes the existing annotation if `null` is supplied.

Applies to

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