Dynamic report

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C#

Good afternoon Friends,
I would create a report that was all set up by the customer, for example, the client can enter any field or database.
That is, create templates for your documents as you wish. what they really need is something like a mail merge.
Where would

 <logo_empresa>
declare that <nome_cliente> course <Nome_Curso> be concluded in the period up to <data_inicio_curso> <data_final_curso>.
att <nome_diretor_Curso>

Where does this between the <> would take the data from the database, and the customer if he could ride the way he wanted

Update from OP: I need to create a dynamic report, where the customer chooses the fields you want displayed from the database