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Row duplication
The RowDuplication simply creates duplicates of the incoming rows. You can specify how many copies you want or if you want to create a copy only if a predicate evaluates to true.
Overview
Sometimes you want to duplicate the rows of your input data. This can be easily done with the RowDuplication transformation - it will give you one or more duplicates of your data. If you want only to duplicate particular rows, you can pass a Predicate expression that define which rows can be clones and which not.
Buffer
The RowDuplication is a non blocking transformation. It has one input buffer.
Code snippet
Here a simple example for creating three duplicates of each row:
var source = new DbSource<InputType>("SourceTable");
RowDuplication<InputType> duplication = new RowDuplication<InputType>(3);
var dest = new CsvDestination<InputType>("output.csv");
source.LinkTo(duplication).LinkTo(dest);Example
Let’s have a look at an example for data duplication:
public class MyRow
{
public string Value { get; set; }
}
public static void Main()
{
var source = new MemorySource<MyRow>();
source.DataAsList.Add(new MyRow() { Value = "A" });
source.DataAsList.Add(new MyRow() { Value = "B" });
var duplication = new RowDuplication<MyRow>();
duplication.NumberOfDuplicates = 2;
var dest = new MemoryDestination<MyRow>();
source.LinkTo(duplication).LinkTo(dest);
Network.Execute(source);
foreach (var row in dest.Data)
Console.WriteLine($"Value:{row.Value}");
//Output
/* Value:A
Value:A
Value:A
Value:B
Value:B
Value:B
*/
}The default value for the RowDuplication is one, which means that every row creates one copy.
You can set up a predicate that only creates a copy of the row if it evaluates to true. If we set the CanDuplicate property in the example above:
var duplication = new RowDuplication<MyRow>();
duplication.NumberOfDuplicates = 2;
duplication.CanDuplicate = row => row.Value == "A";
);This would change the output to this:
//Output
/* Value:A
Value:A
Value:A
Value:B
*/