Datagrid

Question

hello, I'm using an Xml-file to fill my dataset and I place the dataset in my datagrid. My problem is that when I click a row in the datagrid, I want the data in text and/or checkboxes that are placed below the datagrid. Then I want to change the data in the text and checkboxes and then the row that was selected in the datagrid has to be replaced with what has changed in the textboxes Is this possible or to difficult? thx in advance!