我创建了一个SSIS自定义数据流组件，它执行将日期从COBOL主机日期类型（格式为CYYMMDD）转换为SQL Server支持的YYYYMMDD格式的简单任务。存在错误行，因为传入的COBOL格式化日期可能是无效日期（即，2-29-2015，4-31-2016，9-31-2010等）。这些错误的日期来自用户派生的输入字段，这些输入字段上没有日期掩码，我无法添加日期掩码，因为该应用程序属于第三方数据供应商。
我的问题：
自定义组件不会重定向错误行。我在MSDN上发现了一个解释如何重定向错误行的帖子：
https://msdn.microsoft.com/en-us/library/ms136009.aspx
我使用此代码作为指南并对其进行了修改，以满足我对能够执行多个选定输入列的需求（MS的示例仅考虑一个输入列）。当我执行该过程时，我得到以下两个错误：
[ConvertCobolDates [2]]错误：System.ArgumentException：值不在预期范围内。 在Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSBuffer100.DirectErrorRow（Int32 hRow，Int32 lOutputID，Int32 lErrorCode，Int32 lErrorColumn） 在Microsoft.SqlServer.Dts.Pipeline.PipelineBuffer.DirectErrorRow（Int32 outputID，Int32 errorCode，Int32 errorColumn） 在SSIS.Convert.CobolDate.DataFlow.ConvertCobolDateDataFlow.ProcessInput（Int32 inputID，PipelineBuffer buffer） 在Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput（IDTSManagedComponentWrapper100包装器，Int32 inputID，IDTSBuffer100 pDTSBuffer，IntPtr bufferWirePacket） [SSIS.Pipeline]错误：SSIS错误代码DTS_E_PROCESSINPUTFAILED。组件“ConvertCobolDates”（2）上的ProcessInput方法在处理输入“Input”（4）时失败，错误代码为0x80070057。标识的组件从ProcessInput方法返回错误。该错误特定于组件，但错误是致命的，将导致数据流任务停止运行。在此之前可能会发布错误消息，其中包含有关失败的更多信息。
另外，我不知道是否缺少专门重定向输出的代码，或者错误处理是否错误处理 - 它没有出现在Configure Error Output屏幕中。非常感谢任何帮助！ enter image description here
注意：我怀疑错误位于以下某个位置：ProvideComponentProperties或ProcessInput。
public override void ProvideComponentProperties()
{
try
{
// Perform the base class' method
base.ProvideComponentProperties();
// Start out clean, remove anything put on by the base class
base.RemoveAllInputsOutputsAndCustomProperties();
// Set component information
ComponentMetaData.Name = "ConvertCobolDates";
ComponentMetaData.Description = "Data Flow task that converts COBOL date types into SQL Server Date types for each row flowing through the component.";
ComponentMetaData.ContactInfo = "Contact Info.";
ComponentMetaData.UsesDispositions = true; // As a rule, components should support error dispositions - they make it easier to troubleshoot problems with the data
// Create input objects. This allows the custom component to have a 'Success' input data flow line
IDTSInput100 input = ComponentMetaData.InputCollection.New();
input.Name = "Input";
input.ErrorRowDisposition = DTSRowDisposition.RD_RedirectRow; // Use RD_RedirectRow is ComponentMetaData.UsesDispositions = true. Otherwise, use RD_NotUsed
input.ErrorOrTruncationOperation = "Either a bad date has been detected or an input column(s) has been selected that does not contain dates.";
// Create output objects. This allows the custom component to have a 'Success' output data flow line
IDTSOutput100 output = ComponentMetaData.OutputCollection.New();
output.Name = "Output";
output.SynchronousInputID = input.ID; //Synchronous transformation
output.ExclusionGroup = 1;
// Create output objects. This allows the custom component to have a 'Error' output data flow line
IDTSOutput100 errorOutput = ComponentMetaData.OutputCollection.New();
errorOutput.IsErrorOut = true;
errorOutput.Name = "ErrorOutput";
errorOutput.SynchronousInputID = input.ID;
errorOutput.ExclusionGroup = 1;
}
catch (Exception ex)
{
bool bolCancel = false;
ComponentMetaData.FireError(0, ComponentMetaData.Name, ex.Message, "", 0, out bolCancel);
throw;
}
}
public override void ProcessInput(int inputID, PipelineBuffer buffer)
{
IDTSInput100 input = ComponentMetaData.InputCollection.GetObjectByID(inputID);
// This code assumes the component has two outputs, one the default,
// the other the error output. If the intErrorOutputIndex returned from GetErrorOutputInfo
// is 0, then the default output is the second output in the collection.
int intDefaultOutputID = -1;
int intErrorOutputID = -1;
int intErrorOutputIndex = -1;
int intErrorColumnIndex = -1;
bool bolValidDate = false;
GetErrorOutputInfo(ref intErrorOutputID, ref intErrorOutputIndex);
if (intErrorOutputIndex == 0)
intDefaultOutputID = ComponentMetaData.OutputCollection[1].ID;
else
intDefaultOutputID = ComponentMetaData.OutputCollection[0].ID;
// Process each incoming row
while (buffer.NextRow())
{
try
{
for (int i = 0; i < inputBufferColumnIndex.Length; i++)
{
if (!buffer.IsNull(inputBufferColumnIndex[i]))
{
// Get the name of the current column that is being processed
string strColName = this.ComponentMetaData.InputCollection[0].InputColumnCollection[i].Name;
// Get the current row number that is being processed
int intCurRow = buffer.CurrentRow + 2; // Buffer.CurrentRow is zero bounded and the first row is a header row, which is skipped. Adjust by two to account for this
// Ideally, your code should detect potential exceptions before they occur, rather
// than having a generic try/catch block such as this. However, because the error or truncation implementation is specific to each component,
// this sample focuses on actually directing the row, and not a single error or truncation.
// Get the ID of the PipelineBuffer column that may cause an error. This is required for redirecting error rows
intErrorColumnIndex = this.ComponentMetaData.InputCollection[0].InputColumnCollection[i].ID;
string strCobolDate = buffer.GetString(inputBufferColumnIndex[i]);
string strConvertedCobolDate = ConvertCobolDate(strCobolDate, strColName, intCurRow);
DateTime dtConvertedSQLDate;
// Validate that the date is correct. This detects bad dates (e.g., 2-30-2016, 4-31-2015, etc.) that are inputted from the user
// Throw an error if the date is bad
bolValidDate = DateTime.TryParse(strConvertedCobolDate, out dtConvertedSQLDate);
if (!bolValidDate)
{
// Validation failed, throw an exception and redirect the error row
throw new Exception();
}
else if (bolValidDate)
{
// validation passed. Direct the column back to its corresponding row within the pipeline buffer
buffer[inputBufferColumnIndex[i]] = dtConvertedSQLDate.ToShortDateString();
}
}
}
// Unless an exception occurs, direct the row to the default
buffer.DirectRow(intDefaultOutputID);
}
catch(Exception)
{
// Has the user specified to redirect the row?
if (input.ErrorRowDisposition == DTSRowDisposition.RD_RedirectRow)
{
// Yes, direct the row to the error output.
buffer.DirectErrorRow(intErrorOutputID, 0, intErrorColumnIndex);
}
else if (input.ErrorRowDisposition == DTSRowDisposition.RD_FailComponent || input.ErrorRowDisposition == DTSRowDisposition.RD_NotUsed)
{
// No, the user specified to fail the component, or the error row disposition was not set.
throw new Exception("An error occurred, and the DTSRowDisposition is either not set, or is set to fail component.");
}
else
{
// No, the user specified to ignore the failure so direct the row to the default output.
buffer.DirectRow(intDefaultOutputID);
}
}
}
}
答案 0 :(得分：2)
经过一些痛苦的研究和朋友的帮助后，问题已经确定 - 错误代码为0（在MSDN文章中我预先发布），它被传递到DirectErrorRow函数是不正确的[它实际上是一个负数（在这种情况下：-1071628258）]。这是一个难以修复的错误，因为编译器输出了一个通用的越界错误，而没有指定超出范围的参数和值（见下文）。
我认为编译器错误指的是它无法转换的实际错误日期，所以我把所有时间都花在了msError文章列出的intErrorColumnIndex上：
我认为Microsoft提供的errorCode为0是正确的。在预感，我的朋友说尝试检索实际的错误代码，这是有效的！因此，errorCode可能在负无穷大到-1之间。有关引导错误行的Microsoft MSDN文章需要更正。
我：1
Microsoft：0
解决方案如下：catch块：
catch(Exception)
{
// Has the user specified to redirect the row?
if (input.ErrorRowDisposition == DTSRowDisposition.RD_RedirectRow)
{
// Yes, get the error code
int DTS_E_ERRORTRIGGEREDREDIRECTION = -1;
unchecked
{
DTS_E_ERRORTRIGGEREDREDIRECTION = (int)0xC020401E;
}
// Direct the row to the error output
buffer.DirectErrorRow(intErrorOutputID, DTS_E_ERRORTRIGGEREDREDIRECTION, intErrorColumnIndex);
}
else if (input.ErrorRowDisposition == DTSRowDisposition.RD_FailComponent || input.ErrorRowDisposition == DTSRowDisposition.RD_NotUsed)
{
// No, the user specified to fail the component, or the error row disposition was not set
throw new Exception("An error occurred, and the DTSRowDisposition is either not set or is set to fail component.");
}
else
{
// No, the user specified to ignore the failure so direct the row to the default output
buffer.DirectRow(intDefaultOutputID);
}
}