title: Change a DataGridCell's background from the codebehind in Silverlight 4
body: <p>I am writing a silverlight app that lets you parse copied text via entered delimiters. After the data is parsed and dropped into the grid, the user has the ability to "Scrub" the data. This compares the current value of a cell to the allowed values for the column, picks its best guess and rebinds the data to the grid via the ItemsSource property.</p>
  
  <p>My problem is that I know the coordinates of each cell that has been "Scrubbed", and I would like to highlight this cell or change its background color. As far as I can see, you can set a DataGridCell's background individually, but I have no way to access the DataGridCell. I have access to the Grid's columns and rows, but these also do not appear to give access to the DataGridCell as I had hoped. Does anyone have a way to access a DataGridCell after the ItemsSource has been set? </p>