ssis - 从 SSIS 包中提取映射列

Question

我正在使用 .NET 从 SSIS 包中提取元数据。

有没有办法从 OLEDB 源（没有用于语句的变量）和它的目的地中提取映射信息？

Answer 1

是的，尽管您必须深入了解IDTSPipeline100和相关接口的杂草才能这样做：

using System;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;

namespace CSharpConsoleApp
{
    class PackageDemo
    {
        public void CountColumns(string packagePath, string dataFlowName)
        {
            Application app = new Application();
            Package package = app.LoadPackage(packagePath, null);

            TaskHost th = package.Executables[dataFlowName] as TaskHost;
            MainPipe mp = th.InnerObject as MainPipe;
            foreach (IDTSComponentMetaData100 md in mp.ComponentMetaDataCollection)
            {
                foreach (IDTSOutput100 output in md.OutputCollection)
                {
                    Console.WriteLine("Component {0} output {1} has {2} columns", 
                        md.Name, output.Name, output.OutputColumnCollection.Count);
                    foreach (IDTSOutputColumn100 column in output.OutputColumnCollection)
                    {
                        Console.WriteLine("\tcolumn {0} ({1}) is of type {2}", 
                            column.ID, column.Name, column.DataType);
                    }
                }
            }
        }
    }
}

请注意，您需要引用Microsoft.SqlServer.ManagedDTS、Microsoft.SqlServer.DtsPipelineWrap和Microsoft.SqlServer.DtsRuntimeWrapDLL 才能编译此代码。