Gets the current PipelineComponentInfo element from the collection.
命名空間: Microsoft.SqlServer.Dts.Runtime
組件: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)
語法
'宣告
Public ReadOnly Property Current As PipelineComponentInfo
public PipelineComponentInfo Current { get; }
public:
property PipelineComponentInfo^ Current {
PipelineComponentInfo^ get ();
}
/** @property */
public PipelineComponentInfo get_Current ()
public function get Current () : PipelineComponentInfo
屬性值
The current PipelineComponentInfo element in the collection.
備註
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 the enumerator can read the value of the Current property; otherwise, Current is undefined and an exception is thrown.
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 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. However, 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.
範例
The following code sample creates an enumerator, and then uses the Current and MoveNext methods to navigate over the collection.
[C#]
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace TaskInfos_Item
{
class Program
{
static void Main(string[] args)
{
Application app = new Application();
PipelineComponentInfos pInfos = app.PipelineComponentInfos;
//Create the Enumerator.
PipelineComponentInfoEnumerator myEnumerator= pInfos.GetEnumerator();
Console.WriteLine("The collection contains the following values:");
int i = 0;
while ((myEnuemrator.MoveNext()) && (myEnuemrator.Current != null))
Console.WriteLine("[{0}] {1}", i++, myEnuemrator.Current.Name);
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Namespace TaskInfos_Item
Class Program
Shared Sub Main(ByVal args() As String)
Dim app As Application = New Application()
Dim pInfos As PipelineComponentInfos = app.PipelineComponentInfos
'Create the Enumerator.
Dim myEnumeratorAs PipelineComponentInfoEnumerator = pInfos.GetEnumerator()
Console.WriteLine("The collection contains the following values:")
Dim i As Integer = 0
While (myEnuemrator.MoveNext()) &&(myEnuemrator.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] Merge
[1] Merge Join
[2] Lookup
[3] Audit
[4] Row Sampling
[5] Dimension Processing
[6] Term Extraction
[7] Data Mining Model Training
[8] OLE DB Source
[9] Character Map
[10] Fuzzy Grouping
執行緒安全性
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.
平台
開發平台
如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。
目標平台
如需受支援的平台清單，請參閱＜安裝 SQL Server 2005 的硬體和軟體需求＞。
請參閱
參考
PipelineComponentInfoEnumerator Class
PipelineComponentInfoEnumerator Members
Microsoft.SqlServer.Dts.Runtime Namespace