ExtendedProperties.Contains(Object) 方法
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
返回一个布尔值,该值指示是否可以使用索引访问集合中的项,而不引发异常。
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
要在集合中找到的名称、标识、ID 或索引。
返回
一个布尔值,指示是否可以按名称、说明、ID 或索引访问集合。 true 值指示可以使用语法 ExtendedProperties[index] 访问集合。 false 值指示索引不能用于从 ExtendedProperties 集合中检索项;使用此属性引发异常。
示例
下面的代码示例使用 Contains 方法来确定给定的 GUID 的扩展属性是否在集合中。 该方法返回一个 Boolean
.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
namespace ExtendedProperties_Testing
{
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);
// Get the extended properties collection from the package.
ExtendedProperties myExtProps = pkg.ExtendedProperties;
// Use the ID.
Boolean hasGUID = myExtProps.Contains("{F3B7314E-DB1E-4CCA-A856-2E617A1B3265}");
Console.WriteLine("The extended property contains that GUID? {0}", hasGUID);
Console.WriteLine();
}
}
}
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Namespace ExtendedProperties_Testing
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)
' Get the extended properties collection from the package.
Dim myExtProps As ExtendedProperties = pkg.ExtendedProperties
' Use the ID.
Dim hasGUID As Boolean = myExtProps.Contains("{F3B7314E-DB1E-4CCA-A856-2E617A1B3265}")
Console.WriteLine("The extended property contains that GUID? {0}", hasGUID)
Console.WriteLine()
End Sub
End Class
End Namespace
示例输出:
扩展属性包含该 GUID? True