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Variable.EvaluateAsExpression Property

Gets or sets a Boolean that indicates that the variable contains an expression.

Namespace:  Microsoft.SqlServer.Dts.Runtime
Assembly:  Microsoft.SqlServer.ManagedDTS (in Microsoft.SqlServer.ManagedDTS.dll)

public bool EvaluateAsExpression { get; set; }

Property Value

Type: System.Boolean
A Boolean that indicates if the variable contains an expression.

Expressions and variables can be used to control the flow of a package. For more information, see Adding Expressions to Precedence Constraints.

The following example sets the EvaluateAsExpression flag to show that the variable contains an expression, and then can use the Expression property.

static void Main(string[] args)
        Package p = new Package();
        p.Variables.Add("x", false, "", 1);
        Variable v = p.Variables.Add("y", false, "", 1);
        v.Expression = "@x + 10";
        v.EvaluateAsExpression = true;
        if (v.Value.ToString() == "11")
            Console.WriteLine("Value was 11");
            Console.WriteLine("Value was not 11");

Sample Output:

Value was 11