I want to return all the rows that contains a specific string to a textbox. I tried a lot of things but didn't get the result i was looking for.
foreach(DataRowView drTesla in dgdArtikel.ItemsSource)
{
if (dgdArtikel.Items.Contains("Tesla"))
{
// do something
}
}
Description of image, overview datatable and the wanted result
Since I am pretty sure your datagrid view has rows of concrete type which you forgot to mention the correct way to do what you need is:
dgdArtikel.ItemsSource.Cast<Artikel>().Where(i => i.Code == "Tesla")