Switch<T> Constructors

Definition

Namespace:

System.Activities.Statements

Assembly:

System.Activities.dll

Creates a new instance of the Switch<T> class.

Overloads

Switch<T>()	Creates a new instance of the Switch<T> class.
Switch<T>(Activity<T>)	Creates a new instance of the Switch<T> class with the specified expression.
Switch<T>(InArgument<T>)	Creates a new instance of the Switch<T> class with the specified expression.
Switch<T>(Expression<Func<ActivityContext,T>>)	Creates a new instance of the Switch<T> class with the specified expression.

Examples

The following code sample demonstrates creating a Switch<T> activity.

C#

// check if the number is ok...
new Switch<int>()
{
    DisplayName = "Verify Value from User",
    Expression = ExpressionServices.Convert<int>( env => numberFromUser.Get(env).CompareTo(numberToGuess.Get(env)) ),
    Cases =
    {
        { 0, new Assign<bool>()
            {
                To = new OutArgument<bool>(finished),
                Value = true
            }
        },
        {  1, new WriteLine() { Text = "    Try a lower number number..." } },
        { -1, new WriteLine() { Text = "    Try a higher number" } }
    }
}

Switch<T>()

Creates a new instance of the Switch<T> class.

C#

public Switch();

Examples

The following code sample demonstrates creating a Switch<T> activity.

C#

// check if the number is ok...
new Switch<int>()
{
    DisplayName = "Verify Value from User",
    Expression = ExpressionServices.Convert<int>( env => numberFromUser.Get(env).CompareTo(numberToGuess.Get(env)) ),
    Cases =
    {
        { 0, new Assign<bool>()
            {
                To = new OutArgument<bool>(finished),
                Value = true
            }
        },
        {  1, new WriteLine() { Text = "    Try a lower number number..." } },
        { -1, new WriteLine() { Text = "    Try a higher number" } }
    }
}

Switch<T>(Activity<T>)

Creates a new instance of the Switch<T> class with the specified expression.

C#

public Switch(System.Activities.Activity<T> expression);

Parameters

expression

Activity<T>

The expression to evaluate and compare against the values in the Cases dictionary.

Switch<T>(InArgument<T>)

Creates a new instance of the Switch<T> class with the specified expression.

C#

public Switch(System.Activities.InArgument<T> expression);

Parameters

expression

InArgument<T>

The expression to evaluate and compare against the values in the Cases dictionary.

Switch<T>(Expression<Func<ActivityContext,T>>)

Creates a new instance of the Switch<T> class with the specified expression.

C#

public Switch(System.Linq.Expressions.Expression<Func<System.Activities.ActivityContext,T>> expression);

Parameters

expression

Expression<Func<ActivityContext,T>>

The expression to evaluate and compare against the values in the Cases dictionary.