Exportar (0) Imprimir
Expandir Tudo

Propriedade do RDL Parameters

Define o valor de uma expressão de filtro.

Namespace:  Microsoft.ServiceBus.Messaging
Assembly:  Microsoft.ServiceBus (em Microsoft.ServiceBus.dll)

public IDictionary<string, Object> Parameters { get; }

You can use the Parameters property to define a parameterized expression that indirectly sets the value of a filter expression, rather than specifying the value as part of the filter expression itself. This is very similar to parameterized SQL.

A benefit to using parameterized filter expressions is that you do not have to escape the string as part of the filter expression grammar. This makes it easier, for example, to construct the filter expression based on user input. Additionally, the parameter enables you to use constant literals that are not part of the grammar, such as DateTime, DateTimeOffset, TimeSpan, Guid, and so on, since they can now appear directly as part of the Parameters property.

A valid parameter name always starts with the @ symbol, and the first character must be any Unicode character that is categorized as a Unicode letter. The second and subsequent characters can be any Unicode character that is categorized as a Unicode letter or a Unicode digit.

The following filter is identical to “MyProperty = 'SomeString'” but uses a parameter instead.

Filter filter = new SqlFilter("MyProperty = @myProperty")
    Parameters =
        { "@myProperty", "SomeString" },

Contribuições da comunidade

A Microsoft está realizando uma pesquisa online para saber sua opinião sobre o site do MSDN. Se você optar por participar, a pesquisa online lhe será apresentada quando você sair do site do MSDN.

Deseja participar?
© 2014 Microsoft