how to add images in grid view in c#

string selectSQL = "SELECT description,url FROM imgTable";
        SqlConnection cnn = new SqlConnection(connectionString);
        SqlDataAdapter adp = new SqlDataAdapter(selectSQL, cnn);
        DataSet ds = new DataSet();
        adp.Fill(ds);
        dgv1.DataSource = ds;
        dgv1.DataBind();

<itemtemplate>
                <asp:imagebutton id="Image1" runat="server" height="120px" xmlns:asp="#unknown">
                    ImageUrl=' <%#Eval("url")%>' Width="180px" CommandName="select" CommandArgument='<%#Eval("url") %>'/>
                <br />
                Description : <%#Eval("Description")%> 
               
            </asp:imagebutton></itemtemplate>