Table of Contents

Class ObjectQueryBase<TQuery, TObject>

Namespace
CMS.DataEngine
Assembly
CMS.DataEngine.dll

Predefined query returning given object type. Uses the .generalselect query internally.

public abstract class ObjectQueryBase<TQuery, TObject> : DataQueryBase<TQuery>, ICMSQueryable<TObject>, ICMSQueryable, IObjectQuery<TQuery, TObject>, IDataQuery<TQuery>, IDataQuerySettings<TQuery>, IWhereCondition<TQuery>, IQueryParameters<TQuery>, IObjectQuery, IDataQuery, IDataQuerySettings, IWhereCondition, IQueryParameters, IQueryObjectWithValue, IQueryObject where TQuery : ObjectQueryBase<TQuery, TObject>, new() where TObject : BaseInfo

Type Parameters

TQuery
TObject
Inheritance
object
ObjectQueryBase<TQuery, TObject>
Implements
ICMSQueryable<TObject>
IObjectQuery<TQuery, TObject>
IDataQuery<TQuery>
Derived
ObjectQuery<TObject>
Inherited Members
Extension Methods

Constructors

ObjectQueryBase(string)

Constructor

protected ObjectQueryBase(string objectType)

Parameters

objectType string

Object type

Properties

ElementType

Returns the element type.

public Type ElementType { get; }

Property Value

Type

Expression

Query expression

public Expression Expression { get; }

Property Value

Expression

IsOffline

Returns true if the given collection is offline (disconnected from the database)

public bool IsOffline { get; }

Property Value

bool

Name

Object name, empty by default

public override string Name { get; }

Property Value

string

Object

Object instance of the specified type.

protected BaseInfo Object { get; set; }

Property Value

BaseInfo

ObjectType

Returns the object type of the objects stored within the collection.

public virtual string ObjectType { get; set; }

Property Value

string

Provider

Query provider

public IQueryProvider Provider { get; }

Property Value

IQueryProvider

TypeInfo

Type info of the specified type

public ObjectTypeInfo TypeInfo { get; }

Property Value

ObjectTypeInfo

TypedResult

Gets InfoDataSet<TInfo> representing the result of this query.

public virtual InfoDataSet<TObject> TypedResult { get; }

Property Value

InfoDataSet<TObject>

UseObjectTypeCondition

If true, the query uses the object type condition.

public virtual bool UseObjectTypeCondition { get; set; }

Property Value

bool

Methods

AsNested()

Creates a nested query from the given query

public virtual ObjectQuery<TObject> AsNested()

Returns

ObjectQuery<TObject>

CopyPropertiesTo(IQueryObject)

Creates the clone of the collection.

public override void CopyPropertiesTo(IQueryObject target)

Parameters

target IQueryObject

Target class

CreateChild(IDataQuerySettings)

Creates the child collection based on the given provider

public ICMSQueryable<TObject> CreateChild(IDataQuerySettings settings)

Parameters

settings IDataQuerySettings

Query parameters

Returns

ICMSQueryable<TObject>

ForEachObject(Action<TObject>, int)

Executes the given action for each item (TObject) in the result. Processes the items in batches of the given size.

public virtual void ForEachObject(Action<TObject> objAction, int batchSize = -1)

Parameters

objAction Action<TObject>

Object action

batchSize int

Batch size. 0 means no batch processing. By default uses current paging settings.

GetClassName()

Gets the class name for current query

protected override string GetClassName()

Returns

string

GetClassStructureInfo()

Gets the class structure info for this query

protected override ClassStructureInfo GetClassStructureInfo()

Returns

ClassStructureInfo

GetData()

Gets data set returned by object query or custom data set. Data set can be modified by calling ObjectEvents.GetData event.

protected override DataSet GetData()

Returns

DataSet

GetDataSourceName()

Gets the unique query source ID

protected override string GetDataSourceName()

Returns

string

GetDefaultOrderBy()

Gets the default order by columns

protected override string GetDefaultOrderBy()

Returns

string

GetEnumerableTypedResult(CommandBehavior, bool)

Gets enumerable collection of TObject representing the result of this query.

public virtual IEnumerable<TObject> GetEnumerableTypedResult(CommandBehavior commandBehavior = CommandBehavior.Default, bool newConnection = false)

Parameters

commandBehavior CommandBehavior

Command behavior for the underlying reader.

newConnection bool

If true, the underlying reader will be executed using its own dedicated connection.

Returns

IEnumerable<TObject>

Returns the enumeration resulting from query execution.

Exceptions

NotSupportedException

Thrown when the query does not support reader.

GetEnumerableTypedResultAsync(CommandBehavior, bool, CancellationToken?)

Asynchronously gets enumerable collection of TObject representing the result of this query.

public virtual Task<IEnumerable<TObject>> GetEnumerableTypedResultAsync(CommandBehavior commandBehavior = CommandBehavior.Default, bool newConnection = false, CancellationToken? cancellationToken = null)

Parameters

commandBehavior CommandBehavior

Command behavior for the underlying reader.

newConnection bool

If true, the underlying reader will be executed using its own dedicated connection.

cancellationToken CancellationToken?

The cancellation instruction.

Returns

Task<IEnumerable<TObject>>

Returns a task returning the enumeration resulting from query execution.

Exceptions

NotSupportedException

Thrown when the query does not support reader.

GetEnumerator()

Returns an enumerator that iterates through the query results.

public virtual IEnumerator<TObject> GetEnumerator()

Returns

IEnumerator<TObject>

GetExecutingQuery(DataQuerySettings)

Gets the query to execute against database

public override IDataQuery GetExecutingQuery(DataQuerySettings settings = null)

Parameters

settings DataQuerySettings

Parameters for the query

Returns

IDataQuery

GetIDColumn()

Gets the ID column for this query

protected override string GetIDColumn()

Returns

string

GetResults(IDataQuery, ref int)

Gets results from executing query

protected override DataSet GetResults(IDataQuery query, ref int totalRecords)

Parameters

query IDataQuery

Executing query

totalRecords int

Returns the total records number

Returns

DataSet

InitFromType<T>()

Initializes the query from the given type

protected void InitFromType<T>() where T : BaseInfo

Type Parameters

T

InitIDQuery(string)

Initializes the ID query

protected void InitIDQuery(string resultColumn)

Parameters

resultColumn string

Resulting column

InitTypedResult(InfoDataSet<TObject>)

Initializes the typed result

protected virtual void InitTypedResult(InfoDataSet<TObject> typedResult)

Parameters

typedResult InfoDataSet<TObject>

Result

NewEmptyQuery()

Creates a new empty query

protected override TQuery NewEmptyQuery()

Returns

TQuery

ToString(bool)

Returns the string representation of the expression, with possibility of expanding parameters

public override string ToString(bool expand)

Parameters

expand bool

If true, the result is expanded with parameters so it can act as standalone value.

Returns

string

TypeUpdated()

Updates the query class name based on the current status

protected virtual void TypeUpdated()

WithCodeName(string)

Sets the where condition for a specific object code name

public virtual TQuery WithCodeName(string codeName)

Parameters

codeName string

Code name

Returns

TQuery

WithGuid(Guid)

Sets the where condition for a specific object GUID

public virtual TQuery WithGuid(Guid guid)

Parameters

guid Guid

Object GUID

Returns

TQuery

WithID(int)

Sets the where condition for a specific object ID

public virtual TQuery WithID(int objectId)

Parameters

objectId int

Object ID

Returns

TQuery

WithObjectType(string)

Changes the query to use the given object type. Applies the object type condition to the query. The new object type must have the same class name as the original one.

public virtual TQuery WithObjectType(string objectType)

Parameters

objectType string

Object type for the query

Returns

TQuery

WithSource(params TObject[])

Sets the given DataSet as the source of the data query

[Obsolete("Method was not intended for public use and will be removed.")]
public virtual TQuery WithSource(params TObject[] items)

Parameters

items TObject[]

Source items

Returns

TQuery

Operators

explicit operator InfoDataSet<TObject>(ObjectQueryBase<TQuery, TObject>)

Implicit operator for conversion from DataQuery class to DataSet

public static explicit operator InfoDataSet<TObject>(ObjectQueryBase<TQuery, TObject> query)

Parameters

query ObjectQueryBase<TQuery, TObject>

Query object

Returns

InfoDataSet<TObject>