My current DataGridView looks like this:

[![enter image description here](https://i.stack.imgur.com/n9d17.png)](https://i.stack.imgur.com/n9d17.png)

I'd like to achieve that each (column) "Fachanwendung" is grouping the data by displaying it as a Header. I've tried it with the DataGridViewGrouper like here: <https://10tec.com/articles/datagridview-grouping-two-recipes.aspx>

<https://www.codeproject.com/Tips/995958/DataGridViewGrouper>

Unfortunately, my DataSource and DataMembers are either null or "". Therefore I can't call it like this:

```
DataGridViewGrouper grouper = new DataGridViewGrouper(dataGridView);
grouper.SetGroupOn("Fachanwendung");
//grouper.SetGroupOn(this.dataGridView.Columns["fachanwendung"]);

```

Is there any other way to display (at least a text) over a specific row?