我用.NET在写网站的时候用GridView控件的问题!~急呀!~

对dataset进行操作.然后更新数据库

TextBox customerID = Gridview1.FooterRow.FindControl("CustomerIDTextBox") as TextBox;
TextBox companyName = Gridview1.FooterRow.FindControl("CompanyNameTextBox") as TextBox;
DropDownList ContactTitle = Gridview1.FooterRow.FindControl("ContactTitleDropDownList") as DropDownList;
SqlDataSource1.InsertParameters["CustomerID"].DefaultValue = customerID.Text;
SqlDataSource1.InsertParameters["CompanyName"].DefaultValue = companyName.Text;
SqlDataSource1.InsertParameters["ContactTitle"].DefaultValue=ContactTitle.SelectedValue;
SqlDataSource1.Insert();