DtsEventHandlers.Contains(Object) 方法

参考

定义

命名空间:: Microsoft.SqlServer.Dts.Runtime

程序集:: Microsoft.SqlServer.ManagedDTS.dll

重要

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指示是否可以通过使用名称、索引或 ID 作为索引访问集合中的项。

public:
 bool Contains(System::Object ^ index);

public bool Contains (object index);

member this.Contains : obj -> bool

Public Function Contains (index As Object) As Boolean

参数

index: Object

要从集合中查找的对象的名称、索引或 ID。

Boolean

一个布尔值，指示是否可以按名称、索引或 ID 访问集合。 true 值指示可以使用语法 DtsEventHandlers[index] 访问集合。 false 值指示索引不能用于从 DtsEventHandlers 集合中检索项。

示例

下面的代码示例检索 DtsEventHandlers 集合，然后用于 Contains 查看项语法 [x] 是否可用于该集合。

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

namespace Microsoft.SqlServer.SSIS.Samples  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Package pkg = new Package();  

            // Set up a DtsEventHandler for the OnError event of the package.  
            DtsEventHandler dtsEHOE = (DtsEventHandler)pkg.EventHandlers.Add("OnError");  
            DtsEventHandler dtsEHW = (DtsEventHandler)pkg.EventHandlers.Add("OnWarning");  

            // Create the DtsEventHandlers collection.  
            DtsEventHandlers dtsEHColls = pkg.EventHandlers;  

            // Use the Contains method to see if the item[x] syntax can be used.  
            Boolean dtsContains = dtsEHColls.Contains(0);  
            Console.WriteLine("Item syntax can be used?  {0}", dtsContains);  

            //Using the Item method syntax of [x], obtain the first entry and a name.  
            DtsEventHandler dtsEHFirstEntry = dtsEHColls[0];  
            String nameOfFirstItem = dtsEHColls[0].Name;  

            //Print the name of the log provider object located at position [0].  
            Console.WriteLine("The ID of the first event handler is: {0}", dtsEHFirstEntry.ID);  
            Console.WriteLine("The Name of the first event handler is: {0}", nameOfFirstItem);  
        }  
    }  
}

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

Namespace Microsoft.SqlServer.SSIS.Samples  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim pkg As Package =  New Package()   

            ' Set up a DtsEventHandler for the OnError event of the package.  
            Dim dtsEHOE As DtsEventHandler = CType(pkg.EventHandlers.Add("OnError"), DtsEventHandler)  
            Dim dtsEHW As DtsEventHandler = CType(pkg.EventHandlers.Add("OnWarning"), DtsEventHandler)  

            ' Create the DtsEventHandlers collection.  
            Dim dtsEHColls As DtsEventHandlers =  pkg.EventHandlers   

            ' Use the Contains method to see if the item[x] syntax can be used.  
            Dim dtsContains As Boolean =  dtsEHColls.Contains(0)   
            Console.WriteLine("Item syntax can be used?  {0}", dtsContains)  

            'Using the Item method syntax of [x], obtain the first entry and a name.  
            Dim dtsEHFirstEnTry As DtsEventHandler =  dtsEHColls(0)   
            Dim nameOfFirstItem As String =  dtsEHColls(0).Name   

            'Print the name of the log provider object located at position [0].  
            Console.WriteLine("The ID of the first event handler is: {0}", dtsEHFirstEnTry.ID)  
            Console.WriteLine("The Name of the first event handler is: {0}", nameOfFirstItem)  
        End Sub  
    End Class  
End Namespace

示例输出：

可以使用项语法？ True

第一个事件处理程序的 ID 为：{4B9E438E-BA17-4A51-8235-3072AFF92F99}

第一个事件处理程序的名称为：OnError

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DtsEventHandlers.Contains(Object) 方法

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