Saving gridview data in sql table

Hi,

I have a gridview with blank rows and i can add rows to the gridview at button clickevent. How do i save the data entered in this gridview to the sql table? here is the source for the gridview:I am dynamically creating rows in the gridview

                                CssClass="GridViewStyle" ShowFooter="True" UseAccessibleHeader="False"
                                Width="500px">
                               
                                   
                                   
                                       
                                                                                            Width="90px">
                                       
                                   
                                   
                                       
                                           
                                       
                                   
                                   
                                       
                                           
                                       
                                   
                                   
                                       
                                                                                            CssClass="GridItemStyle" />
                                       
                                       
                                       
                                                                                            ImageUrl="~/ImagesFiles/add_button.png" OnClick="imgadd_click"
                                                ToolTip="add another contact" Width="20px" />
                                       
                                   
                               
                                                                    BorderWidth="2px" Font-Bold="True" ForeColor="#666666" Height="15px" />