Variable.EvaluateAsExpression Property

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

네임스페이스: Microsoft.SqlServer.Dts.Runtime
어셈블리: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

구문

‘선언
Public Property EvaluateAsExpression As Boolean

public bool EvaluateAsExpression { get; set; }

public:
property bool EvaluateAsExpression {
    bool get ();
    void set (bool value);
}

/** @property */
public boolean get_EvaluateAsExpression ()

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

public function get EvaluateAsExpression () : boolean

public function set EvaluateAsExpression (value : boolean)

속성 값

A Boolean that indicates if the variable contains an expression.

주의

Expressions and variables can be used to control the flow of a package. For more information, see 선행 제약 조건에 식 추가.

예

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

스레드 보안

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.

플랫폼

개발 플랫폼

지원되는 플랫폼 목록은 SQL Server 2005 설치를 위한 하드웨어 및 소프트웨어 요구 사항을 참조하십시오.

대상 플랫폼

지원되는 플랫폼 목록은 SQL Server 2005 설치를 위한 하드웨어 및 소프트웨어 요구 사항을 참조하십시오.

참고 항목

참조

Variable Class
Variable Members
Microsoft.SqlServer.Dts.Runtime Namespace