XPathMessageFilterTable<TFilterData>.TryGetValue Method

Definition

Namespace:

System.ServiceModel.Dispatcher

Assembly:

System.ServiceModel.dll

Checks whether a filter is stored in the filter table.

public:
 virtual bool TryGetValue(System::ServiceModel::Dispatcher::MessageFilter ^ filter, [Runtime::InteropServices::Out] TFilterData % data);

public bool TryGetValue (System.ServiceModel.Dispatcher.MessageFilter filter, out TFilterData data);

abstract member TryGetValue : System.ServiceModel.Dispatcher.MessageFilter * 'FilterData -> bool
override this.TryGetValue : System.ServiceModel.Dispatcher.MessageFilter * 'FilterData -> bool

Public Function TryGetValue (filter As MessageFilter, ByRef data As TFilterData) As Boolean

Parameters

filter

MessageFilter

A key to retrieve the data.

data

TFilterData

The data associated with the filter when this method returns true; otherwise, the default value for the type of the data parameter.

Returns

Boolean

true if the filter is present in the filter table; false otherwise.

Remarks

This method is an efficient way to check whether a filter is in the filter table because when the filter is not present it returns false instead of throwing an exception. If you try to retrieve the filter from the table using its Item property (the indexer in C#) and it is not there, an exception is thrown.