UPDATE:好的答案下面好像它在这方面是不相关的(尽管在某种意义上仍然是有用的,所以我会离开它)。我没有考虑到Flat File ConnectionManager具有可用的列,而不必通过具有输出/输入列的源/目标组件
Columns属性的值(GetValue)应该转换为IDTSConnectionManagerFlatFileColumns100(如果使用SQL Server 2005 API,则为90)
或者,将您的配置管理器的InnerObject强制转换为公开Columns属性的IDTSConnectionManagerFlatFile100。
(这些接口可以Microsoft.SqlServer.Dts.Runtime.Wrapper找到)
不知道如何相关,这是你的情况下,如果你仍然需要这一点,但我只是做了一件相似的,所以我想我会分享:
下面的代码将列出Excel 2007文件的所有列,通过构建一个即时的SSIS包(您需要引用Microsoft.SqlServer.DTSPipelineWrap,Microsoft .SqlServer.DTSRuntimeWrap,Microsoft.SQLServer.ManagedDTS和Microsoft.SqlServer.PipelineHost)。
据我所见,唯一的区别是你必须intergate你的加载包,以获得DataFlow任务和相关的平面文件目标组件与其连接管理器(在我的情况下,我自己创建相关的对象)并获取其输入列而不是输出列。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
namespace SSISListColumns
{
class Program
{
static void Main(string[] args)
{
// Create package
Package package = new Package();
// Create excel connection manager and set connection string
string fileName = "sampledata.xlsx";
ConnectionManager connection = package.Connections.Add("EXCEL");
connection.Properties["ConnectionString"].SetValue(connection, string.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=YES""", fileName));
// Add Data Flow task
Executable e = package.Executables.Add("STOCK:PipelineTask");
TaskHost thMainPipe = e as TaskHost;
MainPipe dataFlowTask = thMainPipe.InnerObject as MainPipe;
// Add Excel Source component
IDTSComponentMetaData100 component = dataFlowTask.ComponentMetaDataCollection.New();
component.Name = "ExcelSource";
component.ComponentClassID = "DTSAdapter.ExcelSource.2";
// Set Excel Source properties (connection manager, access mode and sheet/rowset)
CManagedComponentWrapper instance = component.Instantiate();
instance.ProvideComponentProperties();
if (component.RuntimeConnectionCollection.Count > 0)
{
component.RuntimeConnectionCollection[0].ConnectionManager = DtsConvert.GetExtendedInterface(package.Connections[0]);
component.RuntimeConnectionCollection[0].ConnectionManagerID = package.Connections[0].ID;
}
instance.SetComponentProperty("AccessMode", 0);
instance.SetComponentProperty("OpenRowset", "Sheet1$");
// Activate
instance.AcquireConnections(null);
instance.ReinitializeMetaData();
instance.ReleaseConnections();
// List output columns
var output = component.OutputCollection[0];
foreach (IDTSOutputColumn100 column in output.OutputColumnCollection)
{
Console.WriteLine(column.Name);
}
Console.ReadKey();
}
}
}
哇,说说直观的铸造和对象名称! – ProfK 2010-01-20 18:10:52