ConnectionInfoEnumerator.Current Property

Reference

Definition

Namespace:: Microsoft.SqlServer.Dts.Runtime

Assembly:: Microsoft.SqlServer.ManagedDTS.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the current element in the collection.

public:
 property Microsoft::SqlServer::Dts::Runtime::ConnectionInfo ^ Current { Microsoft::SqlServer::Dts::Runtime::ConnectionInfo ^ get(); };

public Microsoft.SqlServer.Dts.Runtime.ConnectionInfo Current { get; }

member this.Current : Microsoft.SqlServer.Dts.Runtime.ConnectionInfo

Public ReadOnly Property Current As ConnectionInfo

Property Value

ConnectionInfo

The current element in the collection.

Examples

The following code sample creates an enumerator, and then uses the Current, MoveNext, and Reset methods to navigate over the collection.

using System;  
using System.Collections.Generic;  
using System.Text;  
using Microsoft.SqlServer.Dts.Runtime;  

namespace ConnInfos_Current  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Application dtsApplication = new Application();  
            ConnectionInfos connectionInfos = dtsApplication.ConnectionInfos;  

            //Create the Enumerator.  
            ConnectionInfoEnumerator ConnInfoEnum = connectionInfos.GetEnumerator();  
            Console.WriteLine("The collection contains the following values:");  
            int i = 0;  
            while ((ConnInfoEnum.MoveNext()) && (ConnInfoEnum.Current != null))  
                Console.WriteLine("[{0}] {1}", i++, ConnInfoEnum.Current.Name);  
        }  
    }  
}

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports Microsoft.SqlServer.Dts.Runtime  

Namespace ConnInfos_Current  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim dtsApplication As Application =  New Application()   
            Dim connectionInfos As ConnectionInfos =  dtsApplication.ConnectionInfos   

            'Create the Enumerator.  
            Dim ConnInfoEnum As ConnectionInfoEnumerator =  connectionInfos.GetEnumerator()   
            Console.WriteLine("The collection contains the following values:")  
            Dim i As Integer =  0   
            While (ConnInfoEnum.MoveNext()) &&(ConnInfoEnum.Current <> Nothing)  
            Console.WriteLine("[{0}] {1}",i = Console.WriteLine("[{0}] {1}",i + 1  
            End While  
        End Sub  
    End Class  
End Namespace

Sample Output:

The collection contains the following values:

[0] Connection Manager for Files

[1] Connection Manager for SQL Server Compact

[2] Connection Manager for Multiple Flat Files

Remarks

After an enumerator is created, or after a call to the Reset method, the MoveNext method must be called to advance the enumerator to the first element of the collection before reading the value of the Current property; otherwise, Current is undefined and throws an exception.

Current also throws an exception if the last call to MoveNext returned false, which indicates the end of the collection.

Current does not move the position of the enumerator, and consecutive calls to the Current return the same object until either MoveNext or Reset is called.

An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is invalidated and becomes irrecoverable; thus, the next call to MoveNext or Reset throws an InvalidOperationException. If the collection is modified between calls to MoveNext and Current, Current returns the element that it is set to, even if the enumerator has been invalidated.

Applies to

共用方式為