Switch<T>.Expression Property

Reference

Definition

Namespace:: System.Activities.Statements

Assembly:: System.Activities.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

InArgument<T>

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

Attributes: RequiredArgumentAttribute

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

Dela via