GridView1_SelectedIndexChanged

I have a gridview which is being populated with no problems.

I want to be able to reference the data from the cells in the row but
having followed an example on MSDN cannot get any data to be displayed
in a text box
no matter which cell index I provide.

I tried a row of code that successfully displays the rowindex of the
selected row.

The code with comments is below:

protected void GridView1_SelectedIndexChanged(object sender,
EventArgs e)
{
// Get the currently selected row using the SelectedRow
property.
GridViewRow row = GridView1.SelectedRow;

//This row doesn't put anything in the text box (code copied
from MSDN)
TextBox2.Text = row.Cells[2].Text;

//This row (when not commented out and line above commented
out) puts the row index in the text box
//TextBox2.Text = GridView1.SelectedRow.RowIndex.ToString();
}