问题
This is an SSIS related issue
I have a variable that is set to type object. One Dataflow imports some filtered rows into a recordset and this recordset is stored in the object variable.
In a completely seperate dataflow i need to use that recordset as the source. So i created a script component and told it it would be a data source.
I set it up to have the three output columns that i need. My problem is, how do i get every row in the recordset to create a new row in the script component?
I passed in the recordset variable as a readonly variable, when i try to foreach the variable to get to each row i cannot do it because the variable doesn't define a get enumerator method.
Therefore i cant print each row out into those columns and cannot use my script component as a data source.
Has anyone else faced a similar situation? Am i doing something stupid or did you do it in another alternative way?
As a note i am using C# in the script and Visual studio 2008
回答1:
So i looked around a bit and found a VB solution to my issue, i translated it over into C# and this now compiles and behaves as expected. The code i used was this:
DataTable datatable = new DataTable();
System.Data.OleDb.OleDbDataAdapter oAdapter = new System.Data.OleDb.OleDbDataAdapter();
oAdapter.Fill(datatable,ReadOnlyVariables["User::XXXXX"]);
foreach (DataRow row in datatable.Rows)
{
Output0Buffer.AddRow();
Output0Buffer.CoverAmount = Convert.ToInt32(row["XXXX"].ToString());
}
for any others who face a similar issue!
Thanks to all for the help
回答2:
I do something similar based on an older versio of Andy Leonard's Incremental Load framework. Our child packages populate a recordset indicating how many new, changed, unchanged, etc row counts we had. In the parent package we test that object to ensure it's been populated before we use it. I need to skip to a meeting so pardon this code as it doesn't quite solve your specific need but hopefully provides a solid shove in the right direction until I can come back in and tailor for your case. I have pseudocode in there for where you'll want to do stuff.
public void Main()
{
bool debug = Convert.ToBoolean(Dts.Variables["Debug"].Value);
string taskName = string.Empty;
string packageName = string.Empty;
string sourceName = string.Empty;
bool fireAgain = false;
taskName = Convert.ToString(Dts.Variables["TaskName"].Value);
packageName = Convert.ToString(Dts.Variables["PackageName"].Value);
// Fix this by defining and passing in params
sourceName = Convert.ToString(Dts.Variables["TaskName"].Value);
System.Data.OleDb.OleDbDataAdapter adapater = null;
System.Data.DataTable table = null;
System.Data.DataColumn column = null;
System.Data.DataRow row = null;
string message = string.Empty;
object rowCounts = null;
rowCounts = Dts.Variables["RowCounts"].Value;
table = new DataTable();
try
{
// Get us out of this crazy thing - should only be an issue
// first pass through
if (rowCounts == null)
{
Dts.TaskResult = (int)ScriptResults.Success;
return;
}
}
catch (Exception ex)
{
throw new Exception("Failed here");
}
adapater = new System.Data.OleDb.OleDbDataAdapter();
try
{
// This works if we pass in a dataset
//adapater.Fill(table, Dts.Variables["RowCounts"].Value);
adapater.Fill(table, rowCounts);
// TODO: Enumerate through adapter
// Call Output0Buffer.AddRow();
// and Output0Buffer.MyColumn.Value = adapter[i].value // possibly casting to strong type
}
catch (Exception ex)
{
try
{
// This works if we use a datatable
System.Data.DataSet ds = null;
//ds = (DataSet)Dts.Variables["RowCounts"].Value;
ds = (DataSet)rowCounts;
table = ds.Tables[0];
// TODO: Enumerate through datatable as we do with adapter
}
catch (Exception innerException)
{
// continue to swallow exceptions
}
Dts.Variables["ValidCounts"].Value = false;
// trap "Object is not an ADODB.RecordSet or an ADODB.Record
// parse ex.Message
if (ex.Message.Contains("System.ArgumentException: "))
{
System.Text.StringBuilder exceptionMessage = null;
exceptionMessage = new System.Text.StringBuilder();
exceptionMessage.Append(ex.Message);
exceptionMessage.Replace("\nParameter name: adodb", string.Empty);
exceptionMessage.Replace("System.ArgumentException: ", string.Empty);
if (exceptionMessage.ToString() != "Object is not an ADODB.RecordSet")
{
Dts.Events.FireInformation(0, string.Format("{0}.{1}", packageName, taskName), exceptionMessage.ToString(), string.Empty, 0, ref fireAgain);
}
}
}
Dts.Variables["ValidCounts"].Value = false;
if (table.Rows.Count > 0)
{
Dts.Variables["ValidCounts"].Value = true;
}
if (debug)
{
message = string.Format("SourceName: {0}\nValidCounts: {1}", sourceName, false);
//System.Windows.Forms.MessageBox msgBox = null;
//msgBox = new MessageBox();
System.Windows.Forms.MessageBox.Show(message, string.Format("{0}.{1}", packageName, taskName));
//MessageBox(message, string.Format("{0}.{1}", packageName, taskName));
}
Dts.TaskResult = (int)ScriptResults.Success;
}
回答3:
I'm working on the same problem as OP. In my case, I assumed that it was an object, and I spent a lot of time trying to convert it to a datatable. What I discovered was that the object was already a datatable, so from an SSIS Script Task Component, I was able to write this:
DataTable dt = (DataTable)ReadOnlyVariables["User::FTP_DataPath_File_Metadata"].Value;
foreach (DataRow row in dt.Rows)
{
CustomOutputBuffer.AddRow();
CustomOutputBuffer.FileName = row.ItemArray[0].ToString();
CustomOutputBuffer.FileLastModified = Convert.ToDateTime(row.ItemArray[1]);
CustomOutputBuffer.FileSize = Convert.ToInt32(row.ItemArray[2]);
}
This successfully converted my "object variable" to a dataflow, using the Script Component as a Source.
This example was made to accommodate the Task Factory Secure FTP Component, which saves the results of "Get file list with metadata" to an object variable.
来源：https://stackoverflow.com/questions/14585623/enumerating-recordset-in-dataflow-script-component-as-data-source