DbUpdateCommandTree Class

Reference

Definition

Namespace:: System.Data.Entity.Core.Common.CommandTrees

Assembly:: EntityFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Represents a single-row update operation expressed as a command tree. This class cannot be inherited.

public sealed class DbUpdateCommandTree : System.Data.Entity.Core.Common.CommandTrees.DbModificationCommandTree

type DbUpdateCommandTree = class
    inherit DbModificationCommandTree

Public NotInheritable Class DbUpdateCommandTree
Inherits DbModificationCommandTree

Inheritance: Object

DbCommandTree

DbModificationCommandTree
DbUpdateCommandTree

Remarks

Represents a single-row update operation expressed as a canonical command tree. When the Returning property is set, the command returns a reader; otherwise, it returns a scalar indicating the number of rows affected.

Constructors

DbUpdateCommandTree(MetadataWorkspace, DataSpace, DbExpressionBinding, DbExpression, ReadOnlyCollection<DbModificationClause>, DbExpression)

Initializes a new instance of the DbUpdateCommandTree class.

Properties

CommandTreeKind	Gets the kind of this command tree.
DataSpace	Gets the data space in which metadata used by this command tree must reside. (Inherited from DbCommandTree)
MetadataWorkspace	Gets the metadata workspace used by this command tree. (Inherited from DbCommandTree)
Parameters	Gets the name and corresponding type of each parameter that can be referenced within this DbCommandTree . (Inherited from DbCommandTree)
Predicate	Gets an DbExpression that specifies the predicate used to determine which members of the target collection should be updated.
Returning	Gets an DbExpression that specifies a projection of results to be returned, based on the modified rows.
SetClauses	Gets the list of update set clauses that define the update operation.
Target	Gets the DbExpressionBinding that specifies the target table for the data manipulation language (DML) operation. (Inherited from DbModificationCommandTree)
UseDatabaseNullSemantics	Gets a value indicating whether database null semantics are exhibited when comparing two operands, both of which are potentially nullable. The default value is true. For example (operand1 == operand2) will be translated as: (operand1 = operand2) if UseDatabaseNullSemantics is true, respectively (((operand1 = operand2) AND (NOT (operand1 IS NULL OR operand2 IS NULL))) OR ((operand1 IS NULL) AND (operand2 IS NULL))) if UseDatabaseNullSemantics is false. (Inherited from DbCommandTree)

Methods

ToString()

Returns a String that represents this command.

(Inherited from DbCommandTree)

Applies to

Share via