ForEachEnumeratorInfos.Contains 方法
Specifies whether an item can be retrieved from the ForEachEnumeratorInfos collection 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 ForEachEnumeratorInfos
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, ID, or index of the object to return from the collection.
返回值
类型：System.Boolean
A Boolean that indicates whether items can be retrieved using indexing. A value of true indicates that the syntax ForEachEnumeratorInfos[x] can be used without throwing an exception. A value of false indicates that indexing cannot be used to retrieve items from the ForEachEnumeratorInfos collection.
示例
The following code sample uses the Contains method to determine if an enumerator with the name "For Each File Enumerator" is in the collection. The method returns a Boolean.
.gif "注意") 注意 |
|---|
To use the following code sample with a locale other than English, change the string, "For Each File Enumerator", to the localized name of the enumerator. |
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Runtime.Enumerators.Item;
namespace ForEachEnums
{
class Program
{
static void Main(string[] args)
{
Application app = new Application();
ForEachEnumeratorInfos feInfos = app.ForEachEnumeratorInfos;
// Search the collection by name.
if (feInfos.Contains("For Each File Enumerator"))
Console.WriteLine("The collection contains {0} enumerator", feInfos[0].Name);
else
Console.WriteLine("The collection does not contain {0} enumerator", feInfos[0].Name);
}
}
}
Sample Output:
The collection contains For Each File Enumerator enumerator