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Switch<T>.Expression Property

Definition

Gets the object to compare to the keys in the Cases collection.

public:
 property System::Activities::InArgument<T> ^ Expression { System::Activities::InArgument<T> ^ get(); void set(System::Activities::InArgument<T> ^ value); };
[System.Activities.RequiredArgument]
public System.Activities.InArgument<T> Expression { get; set; }
[<System.Activities.RequiredArgument>]
member this.Expression : System.Activities.InArgument<'T> with get, set
Public Property Expression As InArgument(Of T)

Property Value

The object to compare to the keys in the Cases collection.

Attributes

Examples

The following code sample demonstrates setting the Expression property of a Switch<T> activity.

// 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" } }
    }
}

Remarks

The comparison occurs after the expression is evaluated.

Applies to