Variable.Expression Properti

Definisi

Ruang nama:

Microsoft.SqlServer.Dts.Runtime

Rakitan:

Microsoft.SqlServer.ManagedDTS.dll

Mendapatkan atau mengatur ekspresi yang terkandung dalam variabel.

public:
 property System::String ^ Expression { System::String ^ get(); void set(System::String ^ value); };

[Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "ExpressionDesc")]
public string Expression { get; set; }

[<Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "ExpressionDesc")>]
member this.Expression : string with get, set

Public Property Expression As String

Nilai Properti

String

String yang berisi ekspresi.

Atribut

LocalizablePropertyDescriptionAttribute

Contoh

Contoh berikut mengatur EvaluateAsExpression bendera untuk menunjukkan bahwa variabel berisi ekspresi, lalu dapat menggunakan Expression properti .

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  

Contoh Output:

Nilainya adalah 11

Keterangan

Metode Expression mengembalikan ekspresi yang dimasukkan dalam properti nilai hanya ketika EvaluateAsExpression properti diatur ke true; jika tidak, string kosong dikembalikan jika false.