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 */
public boolean get_EvaluateAsExpression ()

/** @property */
public void set_EvaluateAsExpression (boolean value)

public function get EvaluateAsExpression () : boolean

public function set EvaluateAsExpression (value : boolean)

Property Value

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

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms