tDotNETRow properties - 6.1

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Component family




tDotNETRow sends data to and from libraries and classes within .NET or other custom DLL files.


tDotNETRow helps you facilitate data transform by utilizing custom or built-in .NET classes.

 Basic settings

Schema and Edit schema

A schema is a row description, it defines the number of fields to be processed and passed on to the next component. The schema is either built-in or remotely stored in the Repository.

Since version 5.6, both the Built-In mode and the Repository mode are available in any of the Talend solutions.



Built-in: No property data stored centrally.



Repository: Select the Repository file where properties are stored. The following fields are pre-filled in using fetched data

  Use a static method

Select this check box to invoke a static method in .NET and this will disable Use an existing instance check box.

  Propagate a data to output

Select this check box to propagate a transformed data to output.

  Use an existing instance

Select this check box to reuse an existing instance of a .NET object from the Existing instance to use list.

Existing instance to use: Select an existing instance of .NET objects created by the other .NET components from the list.


This check box will be disabled if you have selected Use a static method and selecting this check box will disable Dll to load, Fully qualified class name(i.e. ClassLibrary1.NameSpace2.Class1) and Value(s) to pass to the constructor.


Dll to load

Type in the path, or browse to the DLL library containing the class(es) of interest or enter the assembly's name to be used. For example, System.Data, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089 for an OleDb assembly.


 Fully qualified class name(i.e. ClassLibrary1.NameSpace2.Class1)

Enter a fully qualified name for the class of interest.


 Method name

Fill this field with the name of the method to be invoked in .NET.

  Value(s) to pass to the constructor

Click the plus button to add one or more lines for values to be passed to the constructor for the object. Or, leave this table empty to call a default constructor for the object.

The valid value(s) should be the parameters required by the class to be used.

  Method Parameters

Click the plus button to add one or more lines for parameters to be passed to the method.

  Output value target column

Select a column in the output row from the list to put value into it.

 Advanced settings Create a new instance at each row

Select this check box to create a new instance at each row that passes through the component.

  Method doesn't return a value

Select this check box to invoke a method without returning a value as a result of the processing.

  Returns an instance of a .NET Object

Select this check box to return an instance of a .NET object as a result of a invoked method.

  Store the returned value for later use

Select this check box to store the returned value of a method for later reuse in another tDotNETRow component.


tStatCatcher Statistics

Select this check box to collect log data at the component level.

Global Variables

NB_LINE: the number of rows processed. This is an After variable and it returns an integer.

ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio User Guide.


This component is utilized to integrate with .NET objects.

To use this component, you must first install the runtime DLLs, for example janet-win32.dll for Windows 32-bit version and janet-win64.dll for Windows 64-bit version, from the corresponding Microsoft Visual C++ Redistributable Package. This allows you to avoid errors like the UnsatisfiedLinkError on dependent DLL.

So ensure that the runtime and all of the other DLLs which the DLL to be called depends on are installed and their versions are consistent among one another.


The required DLLs can be installed in the System32 folder or in the bin folder of the Java runtime to be used.

If you need to export a Job using this component to run it outside the Studio, you have to specify the runtime container of interest by setting the -Djava.library.path argument accordingly.