and so many , you can do this by handling event like RowCreated and implementing event handler for it OnRowCreated.
<asp:GridView ID="ctlGridView" runat="server" OnRowCreated="OnRowCreated" />
And in your code behind you can add
protected void OnRowCreated(object sender, GridViewRowEventArgs e)
if (e.Row.RowType == DataControlRowType.DataRow)
string Comments = (String)DataBinder.Eval(e.Row.DataItem, "Comment");
if (Comments != null)
if (Comments.Length > 30)
Comments = Comments.Substring(0, 40) + "...";
e.Row.ForeColor = System.Drawing.Color.red;
in that on "Comment" filed , i just simply minimize the string uptp 40 character and make it as a "RED" color.
like that you can add more feature as u want.