LogProviders.Contains(Object) 方法

定义

命名空间:

Microsoft.SqlServer.Dts.Runtime

程序集:

Microsoft.SqlServer.ManagedDTS.dll

指定是否可以通过索引从集合中检索 LogProviders 某个项而不抛出异常。

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

包含集合中对象的数值索引或身份的对象。

返回

Boolean

一个布尔值，表示是否可以通过索引检索到项。 值为真表示语法 LogProviders[x] 可以不抛出异常地使用。 值为false表示索引无法用于从集合中检索项目 LogProviders 。

示例

以下代码示例使用 Contains 的方法来判断集合中是否存在名为“SSIS文本文件日志提供者”的日志提供者。 该方法返回一个 Boolean。

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

namespace LogProviders_Tests  
{  
    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\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx";  

            // Create the Application, and load the sample.  
            Application app = new Application();  
            Package pkg = app.LoadPackage(mySample, null);  
            LogProviders logProvs = pkg.LogProviders;  

            // Search for the "SSIS log provider for Text files"  
            // in the collection  
            if (logProvs.Contains("SSIS log provider for Text files"))  
                Console.WriteLine("The collection contains {0} provider", logProvs[0].CreationName);  
            else  
                Console.WriteLine("The collection does not contain the SSIS log provider for Text files");  
        }  
    }  
}  

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

Namespace LogProviders_Tests  
    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\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx"   

            ' Create the Application, and load the sample.  
            Dim app As Application =  New Application()   
            Dim pkg As Package =  app.LoadPackage(mySample,Nothing)   
            Dim logProvs As LogProviders =  pkg.LogProviders   

            ' Search for the "SSIS log provider for Text files"  
            ' in the collection  
            If logProvs.Contains("SSIS log provider for Text files") Then  
                Console.WriteLine("The collection contains {0} provider", logProvs(0).CreationName)  
            Else   
                Console.WriteLine("The collection does not contain the SSIS log provider for Text files")  
            End If  
         End Sub  
    End Class  
End Namespace  

示例输出：

该收藏包含DTS。LogProviderTextFile.1 提供者

注解

如果通过该 Add 方法添加日志提供者，该日志提供者的默认 Name 为GUID。