VariableDispenser.GetVariables Method
Locks the variables that are in the read-only list and the read/write list.
Namespace: Microsoft.SqlServer.Dts.Runtime
Assembly: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)
Syntax
'Declaration
Public Sub GetVariables ( _
ByRef variables As Variables _
)
public void GetVariables (
ref Variables variables
)
public:
void GetVariables (
Variables^% variables
)
public void GetVariables (
/** @ref */ Variables variables
)
JScript does not support passing value-type arguments by reference.
Parameters
- variables
The collection that contains all the variables found in the read-only list and the read/write list.
Remarks
Updated sample code:17 July 2006
Call this method to lock all the variables previously added to the read-only list or the read/write list.
If the call succeeds, the lists are freed and the requested variables are combined into a single collection, with each variable locked for the access specified. To unlock the variables, release the variable collection using Unlock on the Variables collection.
If the call fails, the lists remain, but the variables are not locked.
Note
It is desirable to maintain a lock on the variable for the minimum amount of time required. This allows other components and tasks to acquire locks and facilitates sharing of the variables.
Example
The following code example creates a VariableDispenser and adds two system variables to the list that is locked for reading. Then the GetVariables is called to lock both variables in the collection, and the lists are freed and made available for new variables.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace Microsoft.SqlServer.SSIS.Sample
{
class Program
{
static void Main(string[] args)
{
Package pkg = new Package();
Variables vars = null;
VariableDispenser variableDispenser = pkg.VariableDispenser;
variableDispenser.LockForRead("System::PackageName");
variableDispenser.LockForRead("System::OfflineMode");
variableDispenser.GetVariables(ref vars);
// Verify that the variable is locked before unlocking.
Console.WriteLine("Variables are locked? {0}", vars.Locked);
foreach (Variable myVar in vars)
{
Console.WriteLine("Name {0}", myVar.Name);
Console.WriteLine("Description {0}", myVar.Description);
Console.WriteLine();
}
// Use Contains to determine whether indexing can be used.
Boolean pkgName = variableDispenser.Contains("PackageName");
String qName = variableDispenser.GetQualifiedName("PackageName");
Console.WriteLine("Contains is valid? {0}", pkgName);
Console.WriteLine("Fully qualified name is: {0}", qName);
vars.Unlock();
Console.WriteLine("Variables are locked? {0}", vars.Locked);
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Namespace Microsoft.SqlServer.SSIS.Sample
Class Program
Shared Sub Main(ByVal args() As String)
Dim pkg As Package = New Package()
Dim vars As Variables = Nothing
Dim variableDispenser As VariableDispenser = pkg.VariableDispenser
variableDispenser.LockForRead("System::PackageName")
variableDispenser.LockForRead("System::OfflineMode")
variableDispenser.GetVariables( vars)
' Verify that the variable is locked before unlocking.
Console.WriteLine("Variables are locked? {0}", vars.Locked)
Dim myVar As Variable
For Each myVar In vars
Console.WriteLine("Name {0}", myVar.Name)
Console.WriteLine("Description {0}", myVar.Description)
Console.WriteLine()
Next
' Use Contains to determine whether indexing can be used.
Dim pkgName As Boolean = variableDispenser.Contains("PackageName")
Dim qName As String = variableDispenser.GetQualifiedName("PackageName")
Console.WriteLine("Contains is valid? {0}", pkgName)
Console.WriteLine("Fully qualified name is: {0}", qName)
vars.Unlock()
Console.WriteLine("Variables are locked? {0}", vars.Locked)
End Sub
End Class
End Namespace
Sample Output:
Variables are locked? True
Name OfflineMode
Description The offline mode currently set for the package
Name PackageName
Description The package name
Contains is valid? True
Fully qualified name is: System::PackageName
Variables are locked? False
Thread Safety
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.
Platforms
Development Platforms
For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.
Target Platforms
For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.
See Also
Reference
VariableDispenser Class
VariableDispenser Members
Microsoft.SqlServer.Dts.Runtime Namespace
Change History
Release |
History |
17 July 2006 |
Changed content:
|