DynamicControlParameter Class

.NET Framework (current version)

Represents a parameter that is used for master-detail filters in which a data source gets information from another data control.

Namespace: System.Web.DynamicData
Assembly: System.Web.DynamicData (in System.Web.DynamicData.dll)

Inheritance Hierarchy

System::Object
System.Web.UI.WebControls::Parameter
System.Web.DynamicData::DynamicControlParameter

Syntax

C++

public ref class DynamicControlParameter : Parameter, IWhereParametersProvider

Constructors

	Name	Description
	DynamicControlParameter()	Initializes a new instance of the DynamicControlParameter class.
	DynamicControlParameter(String^)	Initializes a new instance of the DynamicControlParameter class, bound to the specified control.

Properties

	Name	Description
	ControlId	Gets or sets the unique identifier of the control that the DynamicControlParameter object binds to.
	ConvertEmptyStringToNull	Gets or sets a value indicating whether the value that the Parameter object is bound to should be converted to null if it is String::Empty.(Inherited from Parameter.)
	DbType	Gets or sets the database type of the parameter.(Inherited from Parameter.)
	DefaultValue	Specifies a default value for the parameter, should the value that the parameter is bound to be uninitialized when the Evaluate method is called.(Inherited from Parameter.)
	Direction	Indicates whether the Parameter object is used to bind a value to a control, or the control can be used to change the value.(Inherited from Parameter.)
	IsTrackingViewState	Gets a value indicating whether the Parameter object is saving changes to its view state.(Inherited from Parameter.)
	Name	Gets or sets the name of the parameter.(Inherited from Parameter.)
	Size	Gets or sets the size of the parameter.(Inherited from Parameter.)
	Type	Gets or sets the type of the parameter.(Inherited from Parameter.)
	ViewState	Gets a dictionary of state information that allows you to save and restore the view state of a Parameter object across multiple requests for the same page.(Inherited from Parameter.)

Methods

	Name	Description
	Clone()	Returns a duplicate of the current Parameter instance.(Inherited from Parameter.)
	Equals(Object^)	Determines whether the specified object is equal to the current object.(Inherited from Object.)
	Evaluate(HttpContext^, Control^)	Throws an System::InvalidOperationException exception to indicate that the DynamicDataManager control is missing.(Overrides Parameter::Evaluate(HttpContext^, Control^).)
	Finalize()	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
	GetDatabaseType()	Gets the DbType value that is equivalent to the CLR type of the current Parameter instance.(Inherited from Parameter.)
	GetHashCode()	Serves as the default hash function. (Inherited from Object.)
	GetType()	Gets the Type of the current instance.(Inherited from Object.)
	GetWhereParameters(IDynamicDataSource^)	Returns the collection of parameters that are used to create a Where clause for when the data source is queried.
	LoadViewState(Object^)	Restores the data source view's previously saved view state.(Inherited from Parameter.)
	MemberwiseClone()	Creates a shallow copy of the current Object.(Inherited from Object.)
	OnParameterChanged()	Calls the OnParametersChanged method of the ParameterCollection collection that contains the Parameter object.(Inherited from Parameter.)
	SaveViewState()	Saves the changes to the Parameter object's view state since the time the page was posted back to the server.(Inherited from Parameter.)
	SetDirty()	Marks the Parameter object so its state will be recorded in view state.(Inherited from Parameter.)
	ToString()	Converts the value of this instance to its equivalent string representation.(Inherited from Parameter.)
	TrackViewState()	Causes the Parameter object to track changes to its view state so they can be stored in the control's ViewState object and persisted across requests for the same page.(Inherited from Parameter.)

Explicit Interface Implementations

	Name	Description
	ICloneable::Clone()	Returns a duplicate of the current Parameter instance.(Inherited from Parameter.)
	IStateManager::LoadViewState(Object^)	This API supports the product infrastructure and is not intended to be used directly from your code. Restores the data source view's previously saved view state.(Inherited from Parameter.)
	IStateManager::SaveViewState()	This API supports the product infrastructure and is not intended to be used directly from your code. Saves the changes to the Parameter object's view state since the time the page was posted back to the server.(Inherited from Parameter.)
	IStateManager::TrackViewState()	This API supports the product infrastructure and is not intended to be used directly from your code. Causes the Parameter object to track changes to its view state so they can be stored in the control's ViewState object and persisted across requests for the same page.(Inherited from Parameter.)
	IStateManager::IsTrackingViewState	This API supports the product infrastructure and is not intended to be used directly from your code. Gets a value indicating whether the Parameter object is saving changes to its view state.(Inherited from Parameter.)

The DynamicControlParameter object is used in the Where parameters collection of the data source control's query. The parameter object automatically filters by primary key or foreign keys between the two controls and supports multi-part keys automatically.

Version Information

.NET Framework
Available since 3.5

Thread Safety

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.