包成功生成。但派生列显示错误波纹管 - 验证错误。这是一个编程的 DataFlowTask 派生列 [2]：尝试解析表达式“Empid”失败并返回错误代码 0xC00470A2。无法解析表达式。它可能包含无效元素或格式不正确。也可能存在内存不足错误。MyProgrammedDataflowTaskWithDerivedColumn.dtsx
下面是我的代码-
// 创建一个应用程序 Application app = new Application(); // 创建一个包 Package pkg = new Package(); //设置一些属性 pkg.Name = @"MyProgrammedDataflowTaskWithDerivedColumn"; //添加到数据库的连接 AdventureWorksLT2008R2 ConnectionManager ConnMgrAdvent = pkg.Connections.Add("OLEDB"); ConnMgrAdvent.ConnectionString = "数据源=412-1682；初始目录=Empdb；提供者=SQLNCLI11.1；集成安全=SSPI；自动翻译=False；"; ConnMgrAdvent.Name = @"AdventureWorks2008R2"; ConnMgrAdvent.Description = @"OLEDB 源的 SSIS 连接管理器"; //添加到数据库的连接 Import_DB ConnectionManager ConnMgrImport_DB = pkg.Connections.Add("OLEDB"); ConnMgrImport_DB.ConnectionString = "数据源=412-1682；初始目录=stgEmpdb；提供者=SQLNCLI11.1；集成安全=SSPI；自动翻译=False；"; ConnMgrImport_DB.Name = @"Import_DB"; ConnMgrImport_DB.Description = @"OLEDB 源的 SSIS 连接管理器";
//Adding the dataflow task to the package
Executable exe = pkg.Executables.Add("STOCK:PipelineTask");
TaskHost TKHSQLHost = (TaskHost)exe;
TKHSQLHost.Name = "This is a programmed DataFlowTask";
MainPipe dataFlowTask = (MainPipe)TKHSQLHost.InnerObject;
// Create the source component.
IDTSComponentMetaData100 source =
dataFlowTask.ComponentMetaDataCollection.New();
source.ComponentClassID = "DTSAdapter.OleDbSource.3";
CManagedComponentWrapper srcDesignTime = source.Instantiate();
srcDesignTime.ProvideComponentProperties();
// Assign the connection manager.
if (source.RuntimeConnectionCollection.Count > 0)
{
source.RuntimeConnectionCollection[0].ConnectionManager =DtsConvert.GetExtendedInterface(ConnMgrAdvent);
source.RuntimeConnectionCollection[0].ConnectionManagerID =
pkg.Connections["AdventureWorks2008R2"].ID;
}
// Set the custom properties of the source.
srcDesignTime.SetComponentProperty("AccessMode", 0);
srcDesignTime.SetComponentProperty("OpenRowset", "[dbo].[emp1]");
// Connect to the data source, and then update the metadata for the source.
srcDesignTime.AcquireConnections(null);
srcDesignTime.ReinitializeMetaData();
srcDesignTime.ReleaseConnections();
// Create the destination component.
IDTSComponentMetaData100 destination =
dataFlowTask.ComponentMetaDataCollection.New();
destination.ComponentClassID = "DTSAdapter.OleDbDestination.3";
CManagedComponentWrapper destDesignTime = destination.Instantiate();
destDesignTime.ProvideComponentProperties();
// Assign the connection manager.
destination.RuntimeConnectionCollection[0].ConnectionManager =
DtsConvert.GetExtendedInterface(ConnMgrImport_DB);
if (destination.RuntimeConnectionCollection.Count > 0)
{
destination.RuntimeConnectionCollection[0].ConnectionManager =
DtsConvert.GetExtendedInterface(ConnMgrImport_DB);
destination.RuntimeConnectionCollection[0].ConnectionManagerID =
pkg.Connections["Import_DB"].ID;
}
// Set the custom properties of the destination
destDesignTime.SetComponentProperty("AccessMode", 0);
destDesignTime.SetComponentProperty("OpenRowset", "[dbo].[emp1]");
// Connect to the data source, and then update the metadata for the source.
destDesignTime.AcquireConnections(null);
destDesignTime.ReinitializeMetaData();
destDesignTime.ReleaseConnections();
//Derived Column
IDTSComponentMetaData100 derived =
dataFlowTask.ComponentMetaDataCollection.New();
derived.Name = "Derived Column Component";
derived.ComponentClassID = "DTSTransform.DerivedColumn.3";
CManagedComponentWrapper DesignDerivedColumns = derived.Instantiate();
DesignDerivedColumns.ProvideComponentProperties(); //design time
derived.InputCollection[0].ExternalMetadataColumnCollection.IsUsed = false;
derived.InputCollection[0].HasSideEffects = false;
//update the metadata for the derived columns
DesignDerivedColumns.AcquireConnections(null);
DesignDerivedColumns.ReinitializeMetaData();
DesignDerivedColumns.ReleaseConnections();
//Create the path from source to derived columns
IDTSPath100 SourceToDerivedPath = dataFlowTask.PathCollection.New();
SourceToDerivedPath.AttachPathAndPropagateNotifications(source.OutputCollection[0],derived.InputCollection[0]);
//Create the path from derived to desitination
IDTSPath100 DerivedToDestinationPath = dataFlowTask.PathCollection.New();
DerivedToDestinationPath.AttachPathAndPropagateNotifications(derived.OutputCollection[0], destination.InputCollection[0]);
// derivedColumns.SetUsageType(dInput.ID, vdInput, vColumn.LineageID, DTSUsageType.UT_READONLY);
//Give me an output column
IDTSInput100 dInput;
IDTSVirtualInput100 vdInput;
//Get this components default input and virtual input
dInput = derived.InputCollection[0];
vdInput = dInput.GetVirtualInput();
IDTSOutputColumn100 myCol = derived.OutputCollection[0].OutputColumnCollection.New();
myCol.Name = "RowKey";
myCol.SetDataTypeProperties(Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType.DT_I4, 0, 0, 0, 0);
myCol.ExternalMetadataColumnID = 0;
myCol.ErrorRowDisposition = DTSRowDisposition.RD_FailComponent;
myCol.TruncationRowDisposition = DTSRowDisposition.RD_FailComponent;
IDTSCustomProperty100 myProp = myCol.CustomPropertyCollection.New();
myProp.Name = "Expression";
myProp.Value = "Empid";// + vColumn.LineageID;
myProp = myCol.CustomPropertyCollection.New();
myProp.Name = "FriendlyExpression";
myProp.Value = "Empid";
//Create the input columns for the transformation component
IDTSInput100 input = derived.InputCollection[0];
IDTSVirtualInput100 derivedInputVirtual = input.GetVirtualInput();
input.ErrorRowDisposition = DTSRowDisposition.RD_NotUsed;
input.ErrorOrTruncationOperation = "";
DesignDerivedColumns.ReleaseConnections();
// Get the destination's default input and virtual input.
IDTSInput100 destinationinput = destination.InputCollection[0];
int destinationInputID = input.ID;
IDTSVirtualInput100 vdestinationinput = destinationinput.GetVirtualInput();
//Iterate through the virtual input column collection.
foreach (IDTSVirtualInputColumn100 vColumn in vdestinationinput.VirtualInputColumnCollection)
{
IDTSInputColumn100 vCol = destDesignTime.SetUsageType(destinationinput.ID, vdestinationinput, vColumn.LineageID, DTSUsageType.UT_READWRITE);
destDesignTime.MapInputColumn(destinationinput.ID, vCol.ID, destinationinput.ExternalMetadataColumnCollection[vColumn.Name].ID);
}
app.SaveToXml(String.Format(@"D:\{0}.dtsx", pkg.Name), pkg, null);