Connections.Contains 方法
Indicates whether the ConnectionManager items in the collection can be accessed by using indexing without throwing an exception.
命名空间： Microsoft.SqlServer.Dts.Runtime
程序集： Microsoft.SqlServer.ManagedDTS（在 Microsoft.SqlServer.ManagedDTS.dll 中）
语法
声明
Public Function Contains ( _
index As Object _
) As Boolean
用法
Dim instance As Connections
Dim index As Object
Dim returnValue As Boolean
returnValue = instance.Contains(index)
public bool Contains(
Object index
)
public:
bool Contains(
Object^ index
)
member Contains :
index:Object -> bool
public function Contains(
index : Object
) : boolean
参数
- index
类型：System.Object
The name, description, ID, or index to locate in the collection.
返回值
类型：System.Boolean
true if the collection can be accessed by using the syntax Connections[index]. If true, the collection can be accessed by name, description, or index. false if indexing cannot be used to retrieve items from the Connections collection.
示例
The following code sample removes a newly-added ADO.NET connection manager from the collection. It then uses the Contains method to make sure that the connection manager is removed.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace Connections_Collection
{
class Program
{
static void Main(string[] args)
{
// The package is one of the SSIS Samples.
string mySample = @"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\ExecuteProcess Sample\ExecuteProcess\UsingExecuteProcess.dtsx";
// Create an application and load the sample.
Application app = new Application();
Package pkg = app.LoadPackage(mySample, null);
Connections myConns = pkg.Connections;
// Show how many connections are in the package.
int myConnsCount = myConns.Count;
Console.WriteLine("The number of connections is: {0}", myConnsCount);
// Add an OLEDB connection manager.
ConnectionManager myConn = pkg.Connections.Add("OLEDB");
myConn.Name = "My OLEDB ConnectionManager";
myConn.ConnectionString = "Data Source=.;Initial Catalog=AdventureWorks;Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Auto Translate=False;";
// Verify the addition of one connection manager.
myConnsCount = myConns.Count;
Console.WriteLine("The number of connections now is: {0}", myConnsCount);
// Write out the names of the connection managers.
foreach (ConnectionManager myCMgrs in myConns)
{
Console.WriteLine("Name: {0}", myCMgrs.Name);
Console.WriteLine("ID: {0}", myCMgrs.ID);
Console.WriteLine("--------------------------------------------");
}
// Remove the connection manager by name.
pkg.Connections.Remove("My OLEDB ConnectionManager");
// Verify the removal of the connection manager.
myConnsCount = myConns.Count;
Console.WriteLine("The number of connections is finally: {0}", myConnsCount);
// Using the Contains method, verify if the connection is in the collection.
Boolean connRemoved = myConns.Contains("My OLEDB ConnectionManager");
Console.WriteLine("The connection is still in the collection? {0}", connRemoved);
Console.WriteLine();
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Namespace Connections_Collection
Class Program
Shared Sub Main(ByVal args() As String)
' The package is one of the SSIS Samples.
Dim mySample As String = "C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\ExecuteProcess Sample\ExecuteProcess\UsingExecuteProcess.dtsx"
' Create an application and load the sample.
Dim app As Application = New Application()
Dim pkg As Package = app.LoadPackage(mySample,Nothing)
Dim myConns As Connections = pkg.Connections
' Show how many connections are in the package.
Dim myConnsCount As Integer = myConns.Count
Console.WriteLine("The number of connections is: {0}", myConnsCount)
' Add an OLEDB connection manager.
Dim myConn As ConnectionManager = pkg.Connections.Add("OLEDB")
myConn.Name = "My OLEDB ConnectionManager"
myConn.ConnectionString = "Data Source=.;Initial Catalog=AdventureWorks;Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Auto Translate=False;"
' Verify the addition of one connection manager.
myConnsCount = myConns.Count
Console.WriteLine("The number of connections now is: {0}", myConnsCount)
' Write out the names of the connection managers.
Dim myCMgrs As ConnectionManager
For Each myCMgrs In myConns
Console.WriteLine("Name: {0}", myCMgrs.Name)
Console.WriteLine("ID: {0}", myCMgrs.ID)
Console.WriteLine("--------------------------------------------")
Next
' Remove the connection manager by name.
pkg.Connections.Remove("My OLEDB ConnectionManager")
' Verify the removal of the connection manager.
myConnsCount = myConns.Count
Console.WriteLine("The number of connections is finally: {0}", myConnsCount)
' Using the Contains method, verify if the connection is in the collection.
Dim connRemoved As Boolean = myConns.Contains("My OLEDB ConnectionManager")
Console.WriteLine("The connection is still in the collection? {0}", connRemoved)
Console.WriteLine()
End Sub
End Class
End Namespace
Sample Output:
The number of connections is: 3
The number of connections now is: 4
Name: Create_Execute_Process_Dest.sql
ID: {B52C0D78-5402-4544-BFEC-2BE203900C91}
--------------------------------------------
Name: customers
ID: {4F945623-B43F-470F-9D1E-D2A0B09177AE}
--------------------------------------------
Name: localhost.AdventureWorks
ID: {47179DDF-BD08-4E29-87C4-3A3D77105C2B}
--------------------------------------------
Name: My OLEDB ConnectionManager
ID: {90DF568E-ECB1-46D2-8DCB-3E2C67391E64}
--------------------------------------------
The number of connections is finally: 3
The connection is still in the collection? False