Свойство Variable.EvaluateAsExpression
Gets or sets a Boolean that indicates whether the variable contains an expression.
Пространство имен: Microsoft.SqlServer.Dts.Runtime
Сборка: Microsoft.SqlServer.ManagedDTS (в Microsoft.SqlServer.ManagedDTS.dll)
Синтаксис
'Декларация
Public Property EvaluateAsExpression As Boolean
Get
Set
'Применение
Dim instance As Variable
Dim value As Boolean
value = instance.EvaluateAsExpression
instance.EvaluateAsExpression = value
public bool EvaluateAsExpression { get; set; }
public:
property bool EvaluateAsExpression {
bool get ();
void set (bool value);
}
member EvaluateAsExpression : bool with get, set
function get EvaluateAsExpression () : boolean
function set EvaluateAsExpression (value : boolean)
Значение свойства
Тип: System.Boolean
true if the variable contains an expression; otherwise, false.
Замечания
Expressions and variables can be used to control the flow of a package. For more information, see Добавление выражений к элементам управления очередностью.
Примеры
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