Variable.SystemVariable Eigenschaft

Definition

Namespace:

Microsoft.SqlServer.Dts.Runtime

Assembly:

Microsoft.SqlServer.ManagedDTS.dll

Erhält einen Booleschen, der angibt, ob die Variable eine Systemvariable ist. Diese Eigenschaft ist schreibgeschützt.

public:
 property bool SystemVariable { bool get(); };

[Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "SystemVariableDesc")]
public bool SystemVariable { get; }

[<Microsoft.SqlServer.Dts.Runtime.Localization.LocalizablePropertyDescription(typeof(Microsoft.SqlServer.Dts.Runtime.Localized), "SystemVariableDesc")>]
member this.SystemVariable : bool

Public ReadOnly Property SystemVariable As Boolean

Eigenschaftswert

Boolean

Ein Boolean, der angibt, ob die Variable eine Systemvariable ist. Ein Wert von wahr zeigt an, dass es sich um eine Systemvariable handelt. Ein Wert von false zeigt an, dass es sich um einen Benutzer oder eine benutzerdefinierte Variable handelt, die nicht im Systemnamensraum enthalten ist.

Attribute

LocalizablePropertyDescriptionAttribute

Beispiele

Das folgende Beispiel erstellt ein Paket, fügt ein ForEachLoophinzu, und fügt der Sammlung der Menge eine ForEachLoopVariable hinzu.Variables Anschließend ruft es die Eigenschaften der Variablen ab, setzt sie und zeigt sie zur Ansicht an, einschließlich der SystemVariable.

static void Main(string[] args)  
        {  
            Package p = new Package();  
            // Add a sequence to the package executables collection  
            Sequence seq = (Sequence)p.Executables.Add("STOCK:SEQUENCE");  
            // Add a ForEachLoop to the Sequence  
            ForEachLoop feLoop = (ForEachLoop)seq.Executables.Add("STOCK:FOREACHLOOP");  

            // Add a variable, v, to the variable collection  
           // of the ForEach loop.  
            Variable v = feLoop.Variables.Add("v", false, "global", 100);  

//  Get and set different variable properties  

            // Creation Name (read-only)  
            String createName = v.CreationName;  

            // Description (read/write)  
            v.Description = "my new v Description";  
            String vDesc = v.Description;  

            // ID (read-only)  
            String vID = v.ID;  

            // Name (read/write)  
            String oldName = v.Name;  
            v.Name = "my_new_V_name";  
            String newName = v.Name;  

            // Namespace (read/write)  
            String oldNamespace = v.Namespace;  
            v.Namespace = "my_new_v_Namespace";  
            String newNamespace = v.Namespace;  

            // Properties (read-only)  
            int pmCount = v.Properties.Count;  

            // Qualified Name (read-only)  
            String QName = v.QualifiedName;  

            // RaiseChangedEvent (read/write)  
            Boolean oldraiseChEvt = v.RaiseChangedEvent;  
            v.RaiseChangedEvent = true;  
            Boolean raiseChangedEvent = v.RaiseChangedEvent;  

            // Read-only (read/write)  
            Boolean vReadOnly = v.ReadOnly;  
            v.ReadOnly = true;  
            Boolean newVReadOnly = v.ReadOnly;  

            // System Variable (read-only)  
            Boolean sysVar = v.SystemVariable;  

            // Type (read-only)  
            TypeCode type = v.DataType;  

            // Value (read/write)  
            Object vValue = v.Value;  

            Console.WriteLine("The variable properties are: ");  
            Console.WriteLine("Creation Name   = {0}", createName);  
            Console.WriteLine("Description        = {0}", vDesc);  
            Console.WriteLine("ID                     = {0}", vID);  
            Console.WriteLine("Old name, new name = {0}, {1}", oldName, newName);  
            Console.WriteLine("Old namespace, new namespace = {0}, {1}", oldNamespace, newNamespace);  
            Console.WriteLine("Properties count   = {0}", pmCount);  
            Console.WriteLine("Qualified Name     = {0}", QName);  
            Console.WriteLine("old RaiseEvent, new RaiseEvent = {0}, {1}", oldraiseChEvt, raiseChangedEvent);  
            Console.WriteLine("old read-only, new read-only = {0}, {1}", vReadOnly, newVReadOnly);  
            Console.WriteLine("System Variable    = {0}", sysVar);  
            Console.WriteLine("Type               = {0}", type);  
        }  

Shared Sub Main(ByVal args() As String)   
    Dim p As New Package()  
    ' Add a sequence to the package executables collection  
    Dim seq As Sequence = CType(p.Executables.Add("STOCK:SEQUENCE"), Sequence)  
    ' Add a ForEachLoop to the Sequence  
    Dim feLoop As ForEachLoop = CType(seq.Executables.Add("STOCK:FOREACHLOOP"), ForEachLoop)  

    ' Add a variable, v, to the variable collection  
    ' of the ForEach loop.  
    Dim v As Variable = feLoop.Variables.Add("v", False, "global", 100)  

    '  Get and set different variable properties  
    ' Creation Name (read-only)  
    Dim createName As String = v.CreationName  

    ' Description (read/write)  
    v.Description = "my new v Description"  
    Dim vDesc As String = v.Description  

    ' ID (read-only)  
    Dim vID As String = v.ID  

    ' Name (read/write)  
    Dim oldName As String = v.Name  
    v.Name = "my_new_V_name"  
    Dim newName As String = v.Name  

    ' Namespace (read/write)  
    Dim oldNamespace As String = v.Namespace  
    v.Namespace = "my_new_v_Namespace"  
    Dim newNamespace As String = v.Namespace  

    ' Properties (read-only)  
    Dim pmCount As Integer = v.Properties.Count  

    ' Qualified Name (read-only)  
    Dim QName As String = v.QualifiedName  

    ' RaiseChangedEvent (read/write)  
    Dim oldraiseChEvt As [Boolean] = v.RaiseChangedEvent  
    v.RaiseChangedEvent = True  
    Dim raiseChangedEvent As [Boolean] = v.RaiseChangedEvent  

    ' Read-only (read/write)  
    Dim vReadOnly As [Boolean] = v.ReadOnly  
    v.ReadOnly = True  
    Dim newVReadOnly As [Boolean] = v.ReadOnly  

    ' System Variable (read-only)  
    Dim sysVar As [Boolean] = v.SystemVariable  

    ' Type (read-only)  
    Dim type As TypeCode = v.DataType  

    ' Value (read/write)  
    Dim vValue As [Object] = v.Value  

    Console.WriteLine("The variable properties are: ")  
    Console.WriteLine("Creation Name   = {0}", createName)  
    Console.WriteLine("Description        = {0}", vDesc)  
    Console.WriteLine("ID                     = {0}", vID)  
    Console.WriteLine("Old name, new name = {0}, {1}", oldName, newName)  
    Console.WriteLine("Old namespace, new namespace = {0}, {1}", oldNamespace, newNamespace)  
    Console.WriteLine("Properties count   = {0}", pmCount)  
    Console.WriteLine("Qualified Name     = {0}", QName)  
    Console.WriteLine("old RaiseEvent, new RaiseEvent = {0}, {1}", oldraiseChEvt, raiseChangedEvent)  
    Console.WriteLine("old read-only, new read-only = {0}, {1}", vReadOnly, newVReadOnly)  
    Console.WriteLine("System Variable    = {0}", sysVar)  
    Console.WriteLine("Type               = {0}", type)  
End Sub   

Beispielausgabe:

Die variablen Eigenschaften sind:

Schöpfungsname =

Beschreibung = mein neues v Beschreibung

ID = {622CF328-55D7-4E81-9385-9C1F8450511E}

Alter Name, neuer Name = v, my_new_V_name

Alter Namensraum, neuer Namensraum = global, my_new_v_Namespace

Eigenschaftenanzahl = 12

Qualifizierter Name = my_new_v_Namespace::my_new_V_name

altes RaiseEvent, neues RaiseEvent = Falsch, True

alte Nur-Lese, Neue Nur-Lese-= Falsch, Wahr

Systemvariable = Falsch

Typ = Int32

Hinweise

Eine Systemvariable ist eine Variable, die im Namensraum System enthalten ist und von einem Paket, Container oder einer Aufgabe generiert wird. System Variablen sind während der Ausführung nicht bearbeitbar.