Variable.EvaluateAsExpression Property
Definition
Important
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Gets or sets a Boolean that indicates whether the variable contains an expression.
public:
property bool EvaluateAsExpression { bool get(); void set(bool value); };
[Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "EvaluateAsExpressionDesc")]
public bool EvaluateAsExpression { get; set; }
[<Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "EvaluateAsExpressionDesc")>]
member this.EvaluateAsExpression : bool with get, set
Public Property EvaluateAsExpression As Boolean
Property Value
true if the variable contains an expression; otherwise, false.
- Attributes
Examples
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");
else
Console.WriteLine("Value was not 11");
}
Shared Sub Main(ByVal args() As String)
Dim p As Package = New Package()
p.Variables.Add("x", False, "", 1)
Dim v As Variable = p.Variables.Add("y",False,"",1)
v.Expression = "@x + 10"
v.EvaluateAsExpression = True
If v.Value.ToString() = "11" Then
Console.WriteLine("Value was 11")
Else
Console.WriteLine("Value was not 11")
End If
End Sub
Sample Output:
Value was 11
Remarks
Expressions and variables can be used to control the flow of a package. For more information, see Add Expressions to Precedence Constraints.